日本臨床スポーツ医学会

日本臨床バイオメカニクス学会

日本整形外科スポーツ医学会

日本関節鏡・膝・スポーツ整形外科学会

日本肘関節学会

日本脊椎脊髄病学会

東日本整形災害外科学会

日本整形外科学会

東北整形災害外科学会

Knee Stability and Graft Function after Anterior Cruciate Ligament Reconstruction

Yuji Yamamoto, Wei-Hsiu Hsu, Savio L-Y. Woo, Andrew H. Van Scyoc, Yoshiyuki Takakura, Richard E. Debski

The American Journal of Sports Medicine   32 ( 8 )   1825 - 1832   2004.12

Possible Roles of CTGF/Hcs24 in the Initiation and Development of Ossification of the Posterior Longitudinal Ligament

Yuji Yamamoto, Ken-Ichi Furukawa, Kazumasa Ueyama, Tohru Nakanishi, Masaharu Takigawa, Seiko Harata

Spine   27 ( 17 )   1852 - 1857   2002.9

Prevalence of Segond fractures associated with anterior cruciate ligament injuries and their influence on knee joint stability; A case-control study.

Kumahara R, Kimura Y, Sasaki S, Sasaki E, Maeda S, Tsukada H, Yamamoto Y, Tsuda E, Ishibashi Y

BMC musculoskeletal disorders   23 ( 1 )   180   2022.2

Bone marrow lesion severity was associated with proximal tibial inclination in early knee osteoarthritis.

Ishibashi K, Sasaki E, Ota S, Oyama T, Chiba D, Yamamoto Y, Tsuda E, Uemura N, Sawada K, Ishibashi Y

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   30 ( 2 )   668 - 679   2022.2

Central Sensitization and Postoperative Improvement of Quality of Life in Total Knee and Total Hip Arthroplasty: A Prospective Observational Study

Sasaki Eiji, Kasai Takayuki, Araki Ryo, Sasaki Tomoyuki, Wakai Yuji, Akaishi Koichi, Chiba Daisuke, Kimura Yuka, Yamamoto Yuji, Tsuda Eiichi, Ishibashi Yasuyuki

Progress in Rehabilitation Medicine   7 ( 0 )   n/a   2022

Effect of a simple core muscle training program on trunk muscle strength and neuromuscular control among pediatric soccer players

Ryotaro Kumahara, Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of Experimental Orthopaedics   8 ( 1 )   36   2021.12

Meniscus Allograft Transplantation Obtained From Adult Patients Undergoing Total Knee Arthroplasty May be Used for Younger Patients After Lateral Discoid Meniscus Meniscectomy.

Kimura Y, Yamamoto Y, Sasaki S, Sasaki E, Sasaki T, Tsuda E, Ishibashi Y

Arthroscopy, sports medicine, and rehabilitation   3 ( 6 )   e1679 - e1685   2021.12

Radiographic assessment of radiolucent lines around a highly porous titanium cup (Tritanium) using digital tomosynthesis, after total hip arthroplasty

Kazuki Oishi, Yuji Yamamoto, Yoshifumi Harada, Ryo Inoue, Eiji Sasaki, Yasuyuki Ishibashi

Journal of Orthopaedic Surgery and Research   16 ( 1 )   266   2021.12

Relationship between abnormalities detected by magnetic resonance imaging and knee symptoms in early knee osteoarthritis

Seiya Ota, Eiji Sasaki, Shizuka Sasaki, Daisuke Chiba, Yuka Kimura, Yuji Yamamoto, Mika Kumagai, Masataka Ando, Eiichi Tsuda, Yasuyuki Ishibashi

Scientific Reports   11 ( 1 )   15179   2021.12

Reduced serum levels of anti-Mullerian hormone is a putative biomarker of early knee osteoarthritis in middle-aged females at menopausal transition

Eiji Sasaki, Daisuke Chiba, Seiya Ota, Yuka Kimura, Shizuka Sasaki, Yuji Yamamoto, Maika Oishi, Kaori Iino, Masataka Ando, Eiichi Tsuda, Yasuyuki Ishibashi

Scientific Reports   11 ( 1 )   4931   2021.12

Clinical Outcomes and Postoperative Complications After All-Epiphyseal Double-Bundle ACL Reconstruction for Skeletally Immature Patients.

Sasaki S, Sasaki E, Kimura Y, Yamamoto Y, Tsuda E, Ishibashi Y

Orthopaedic journal of sports medicine   9 ( 11 )   23259671211051308   2021.11

Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty.

Sasaki S, Sasaki E, Kimura Y, Tsukada H, Otsuka H, Yamamoto Y, Tsuda E, Ishibashi Y

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   29 ( 10 )   3418 - 3425   2021.10

Assessment of Early Biological Fixation of Cementless Tapered-Wedge Stems Using Digital Tomosynthesis

Kazuki Oishi, Ryo Inoue, Yuji Yamamoto, Yoshifumi Harada, Eiji Sasaki, Yasuyuki Ishibashi

The Journal of Arthroplasty   36 ( 9 )   3209 - 3213   2021.9

Association Between Central Sensitization and Increasing Prevalence of Nocturnal Knee Pain in the General Population with Osteoarthritis from the Iwaki Cohort Study

Eiji Sasaki, Seiya Ota, Daisuke Chiba, Yuka Kimura, Shizuka Sasaki, Masataka Ando, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of Pain Research   Volume 14   2449 - 2458   2021.8

Laterally shifted tibial tunnel can be the risk of residual knee laxity for double-bundle anterior cruciate ligament reconstruction

Daisuke Chiba, Yuji Yamamoto, Yuka Kimura, Shizuka Sasaki, Eiji Sasaki, Shohei Yamauchi, Eiichi Tsuda, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   30 ( 1 )   319 - 327   2021.4

Association Between Osteochondritis Dissecans of the Humeral Capitellum and Medial Epicondyle Lesion in Baseball Players

Keita Kamei, Norihiro Sasaki, Eiji Sasaki, Shizuka Sasaki, Yuka Kimura, Shugo Maeda, Yuji Yamamoto, Yasuyuki Ishibashi

Orthopaedic Journal of Sports Medicine   9 ( 4 )   232596712110077 - 232596712110077   2021.4

Reduced serum levels of anti-Mullerian hormone is a putative biomarker of early knee osteoarthritis in middle-aged females at menopausal transition.

Eiji Sasaki, Daisuke Chiba, Seiya Ota, Yuka Kimura, Shizuka Sasaki, Yuji Yamamoto, Maika Oishi, Kaori Iino, Masataka Ando, Eiichi Tsuda, Yasuyuki Ishibashi

Scientific reports   11 ( 1 )   4931 - 4931   2021.3

Ulnar collateral ligament dysfunction increases stress on the humeral capitellum: a finite element analysis.

Keita Kamei, Eiji Sasaki, Kazuhiro Fujisaki, Yoshifumi Harada, Yuji Yamamoto, Yasuyuki Ishibashi

JSES international   5 ( 2 )   307 - 313   2021.3

Combination of anterior tibial and femoral tunnels makes the signal intensity of antero-medial graft higher in double-bundle anterior cruciate ligament reconstruction

Daisuke Chiba, Yuji Yamamoto, Yuka Kimura, Shizuka Sasaki, Eiichi Tsuda, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   29 ( 3 )   783 - 792   2021.3

Biomechanical analysis of bioabsorbable suture anchors for rotator cuff repair using osteoporotic and normal bone models.

Shohei Yamauchi, Harehiko Tsukada, Eiji Sasaki, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   2021.1

Bone marrow lesion severity was associated with proximal tibial inclination in early knee osteoarthritis.

Kyota Ishibashi, Eiji Sasaki, Seiya Ota, Tetsushi Oyama, Daisuke Chiba, Yuji Yamamoto, Eiichi Tsuda, Nozomi Uemura, Kaori Sawada, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   2021.1

Early Return to Sports to Continue the Season after Anterior Cruciate Ligament Injury Is Not Recommended for Student Athletes

Iio Kohei, Kimura Yuka, Sasaki Eiji, Sasaki Shizuka, Yamamoto Yuji, Tsuda Eiichi, Ishibashi Yasuyuki

Progress in Rehabilitation Medicine   6 ( 0 )   n/a   2021

Treatment Efficacy of Single Topical NSAID (S-Flurbiprofen Plaster) for Knee Symptoms and Locomotive Dysfunction in Knee Osteoarthritis Patients

Sasaki Shizuka, Sasaki Eiji, Kimura Yuka, Naraoka Takuya, Yamamoto Yuji, Tsuda Eiichi, Ishibashi Yasuyuki

Progress in Rehabilitation Medicine   6 ( 0 )   n/a - n/a   2021

Incidence and Risk Factors of Subsequent Meniscal Surgery After Successful Anterior Cruciate Ligament Reconstruction: A Retrospective Study With a Minimum 2-Year Follow-up.

Yuka Kimura, Eiji Sasaki, Yuji Yamamoto, Shizuka Sasaki, Eiichi Tsuda, Yasuyuki Ishibashi

The American journal of sports medicine   48 ( 14 )   3525 - 3533   2020.12

All-Epiphyseal Double-Bundle Anterior Cruciate Ligament Reconstruction for Skeletally Immature Patients.

Yasuyuki Ishibashi, Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda

Arthroscopy techniques   9 ( 12 )   e1993 - e2000   2020.12

Acute primary repair of extraarticular ligaments and staged surgery in multiple ligament knee injuries

Yasuyuki Ishibashi, Yuka Kimura, Eiji Sasaki, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda

Journal of Orthopaedics and Traumatology   21 ( 1 )   18 - 18   2020.12

Incidence and Risk Factors of Subsequent Meniscal Surgery After Successful Anterior Cruciate Ligament Reconstruction: A Retrospective Study With a Minimum 2-Year Follow-up.

Yuka Kimura, Eiji Sasaki, Yuji Yamamoto, Shizuka Sasaki, Eiichi Tsuda, Yasuyuki Ishibashi

The American journal of sports medicine   48 ( 14 )   3525 - 3533   2020.12

Detection of synovitis in early knee osteoarthritis by MRI and serum biomarkers in Japanese general population

Kyota Ishibashi, Eiji Sasaki, Seiya Ota, Daisuke Chiba, Yuji Yamamoto, Eiichi Tsuda, Sugimura Yoshikuni, Kazushige Ihara, Yasuyuki Ishibashi

Scientific Reports   10 ( 1 )   12310 - 12310   2020.12

All-Epiphyseal Double-Bundle Anterior Cruciate Ligament Reconstruction for Skeletally Immature Patients

Yasuyuki Ishibashi, Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda

Arthroscopy Techniques   9 ( 12 )   e1993 - e2000   2020.12

Ultraviolet irradiation improves the hydrophilicity and osteo-conduction of hydroxyapatite

Sho Kaneko, Yuji Yamamoto, Kanichiro Wada, Gentaro Kumagai, Yoshifumi Harada, Ryota Yamauchi, Yasuyuki Ishibashi

Journal of Orthopaedic Surgery and Research   15 ( 1 )   425   2020.12

若年スポーツ選手に発生した大腿骨疲労骨折の発生部位の検討

若本 諒, 木村 由佳, 佐々木 静, 佐々木 英嗣, 山本 祐司, 津田 英一, 石橋 恭之, 塚田 晴彦

青森県スポーツ医学研究会誌   29   13 - 15   2020.12

Effects of the tibial tunnel position on knee joint stability and meniscal contact pressure after double-bundle anterior cruciate ligament reconstruction.

Yukiko Sakamoto, Harehiko Tsukada, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   25 ( 6 )   1040 - 1046   2020.11

Effects of the tibial tunnel position on knee joint stability and meniscal contact pressure after double-bundle anterior cruciate ligament reconstruction

Yukiko Sakamoto, Harehiko Tsukada, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of Orthopaedic Science   25 ( 6 )   1040 - 1046   2020.11

骨粗鬆症と骨粗鬆症関連骨折に対する診断と治療 Ⅰ.診断と評価 早期変形性膝関節症における骨髄病変と骨代謝の関連

太田 聖也, 千葉 大輔, 佐々木 英嗣, 山本 祐司, 津田 英一, 石橋 恭之

別冊整形外科   1 ( 78 )   39 - 43   2020.10

Acute primary repair of extraarticular ligaments and staged surgery in multiple ligament knee injuries.

Yasuyuki Ishibashi, Yuka Kimura, Eiji Sasaki, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda

Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology   21 ( 1 )   18 - 18   2020.10

Posterior clearance increases the knee extension angle in cruciate retaining type total knee arthroplasty: Intraoperative evaluation using a navigation system.

Eiji Sasaki, Hironori Otsuka, Norihiro Sasaki, Kyota Ishibashi, Yuji Yamamoto, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   25 ( 5 )   861 - 867   2020.9

Ultraviolet irradiation improves the hydrophilicity and osteo-conduction of hydroxyapatite.

Sho Kaneko, Yuji Yamamoto, Kanichiro Wada, Gentaro Kumagai, Yoshifumi Harada, Ryota Yamauchi, Yasuyuki Ishibashi

Journal of orthopaedic surgery and research   15 ( 1 )   425 - 425   2020.9

膝蓋大腿関節症に対するmicrofractureの治療成績

大山 哲司, 木村 由佳, 佐々木 静, 山本 祐司, 津田 英一, 石橋 恭之

東北膝関節研究会会誌   29 ( 0 )   19 - 22   2020.9

Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty.

Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Harehiko Tsukada, Hironori Otsuka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   2020.9

Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty

Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Harehiko Tsukada, Hironori Otsuka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   2020.9

Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty.

Shizuka Sasaki, Eiji Sasaki, Yuka Kimura, Harehiko Tsukada, Hironori Otsuka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   2020.9

Posterior clearance increases the knee extension angle in cruciate retaining type total knee arthroplasty: Intraoperative evaluation using a navigation system

Eiji Sasaki, Hironori Otsuka, Norihiro Sasaki, Kyota Ishibashi, Yuji Yamamoto, Yasuyuki Ishibashi

Journal of Orthopaedic Science   25 ( 5 )   861 - 867   2020.9

Medial Patellofemoral Ligament Reconstruction Using FiberTape and Knotless SwiveLock Anchors.

Yasuyuki Ishibashi, Yuka Kimura, Eiji Sasaki, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda

Arthroscopy techniques   9 ( 8 )   e1197 - e1202   2020.8

Medial Patellofemoral Ligament Reconstruction Using FiberTape and Knotless SwiveLock Anchors.

Yasuyuki Ishibashi, Yuka Kimura, Eiji Sasaki, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda

Arthroscopy techniques   9 ( 8 )   e1197-e1202 - e1202   2020.8

青森県における乳児股関節健診の実態調査

山本 祐司, 原田 義史, 青木 恵, 福田 陽, 石橋 恭之

日本小児整形外科学会雑誌   29 ( 1 )   11 - 14   2020.7

Detection of synovitis in early knee osteoarthritis by MRI and serum biomarkers in Japanese general population.

Kyota Ishibashi, Eiji Sasaki, Seiya Ota, Daisuke Chiba, Yuji Yamamoto, Eiichi Tsuda, Sugimura Yoshikuni, Kazushige Ihara, Yasuyuki Ishibashi

Scientific reports   10 ( 1 )   12310 - 12310   2020.7

Valgus Correctability and Meniscal Extrusion Were Associated With Alignment After Unicompartmental Knee Arthroplasty

Kyota Ishibashi, Eiji Sasaki, Hironori Otsuka, Koyama Kazushige, Yuji Yamamoto, Yasuyuki Ishibashi

Clinical Orthopaedics & Related Research   478 ( 7 )   1636 - 1644   2020.7

運動器スポーツ傷害に対するリハビリテーション医療

津田 英一, 三浦 和知, 木村 由佳, 佐々木 英嗣, 山本 祐司, 石橋 恭之

The Japanese Journal of Rehabilitation Medicine   57 ( 特別号 )   S358 - S358   2020.7

Patellofemoral Contact Pressure for Medial Patellofemoral Ligament Reconstruction Using Suture Tape Varies With the Knee Flexion Angle: A Biomechanical Evaluation.

Yukiko Sakamoto, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association   36 ( 5 )   1390 - 1395   2020.5

Patellofemoral Contact Pressure for Medial Patellofemoral Ligament Reconstruction Using Suture Tape Varies With the Knee Flexion Angle: A Biomechanical Evaluation

Yukiko Sakamoto, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Arthroscopy: The Journal of Arthroscopic & Related Surgery   36 ( 5 )   1390 - 1395   2020.5

学会を聞く 第45回日本整形外科スポーツ医学会

山本 祐司

整形外科   71 ( 4 )   391 - 393   2020.4

Early knee osteoarthritis prevalence is highest among middle-aged adult females with obesity based on new set of diagnostic criteria from a large sample cohort study in the Japanese general population.

Eiji Sasaki, Seiya Ota, Daisuke Chiba, Yuka Kimura, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda, Shigeyuki Nakaji, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   28 ( 3 )   984 - 994   2020.3

Early knee osteoarthritis prevalence is highest among middle-aged adult females with obesity based on new set of diagnostic criteria from a large sample cohort study in the Japanese general population

Eiji Sasaki, Seiya Ota, Daisuke Chiba, Yuka Kimura, Shizuka Sasaki, Yuji Yamamoto, Eiichi Tsuda, Shigeyuki Nakaji, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   28 ( 3 )   984 - 994   2020.3

Medial stabilizing technique preserves anatomical joint line and increases range of motion compared with the gap-balancing technique in navigated total knee arthroplasty

Kyota Ishibashi, Eiji Sasaki, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Yasuyuki Ishibashi

The Knee   27 ( 2 )   558 - 564   2020.3

Medial stabilizing technique preserves anatomical joint line and increases range of motion compared with the gap-balancing technique in navigated total knee arthroplasty.

Kyota Ishibashi, Eiji Sasaki, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Yasuyuki Ishibashi

The Knee   2020.2

Tibial eminence fracture with midsubstance anterior cruciate ligament tear in a 10-year-old boy: A case report.

Shohei Yamauchi, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

International journal of surgery case reports   67   13 - 17   2020.1

Tibial eminence fracture with midsubstance anterior cruciate ligament tear in a 10-year-old boy: A case report

Shohei Yamauchi, Shizuka Sasaki, Yuka Kimura, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

International Journal of Surgery Case Reports   67   13 - 17   2020

解剖学的2重束膝前十字靱帯再建術における骨孔位置と術後1年における移植腱のMRI信号変化の関連

千葉 大輔, 山本 祐司, 前田 周吾, 木村 由佳, 佐々木 静, 津田 英一, 石橋 恭之

スポーツ傷害   25   3 - 3   2020

膝前十字靱帯損傷に合併した外側半月板損傷と同靱帯再建術後に残存するpivot shiftの関連 コホート研究

山内 翔平, 千葉 大輔, 山本 祐司, 木村 由佳, 佐々木 静, 津田 英一, 石橋 恭之

スポーツ傷害   25   41 - 41   2020

踵骨前方突起疲労骨折の1例

附田 愛美, 木村 由佳, 佐々木 英嗣, 山本 祐司, 津田 英一, 石橋 恭之

青森県スポーツ医学研究会誌   28   17 - 20   2019.12

Symptomatic bone marrow lesions induced by reduced bone mineral density in middle-aged women: a cross-sectional Japanese population study

Seiya Ota, Daisuke Chiba, Eiji Sasaki, Gentaro Kumagai, Yuji Yamamoto, Shigeyuki Nakaji, Eiichi Tsuda, Yasuyuki Ishibashi

Arthritis Research & Therapy   21 ( 1 )   113 - 113   2019.12

ACL再損傷予防をサイエンスする ACL再損傷の危険因子

木村 由佳, 佐々木 静, 佐々木 英嗣, 山本 祐司, 津田 英一, 石橋 恭之

日本臨床スポーツ医学会誌   27 ( 4 )   S121 - S121   2019.11

スポーツによる外傷・障害とリハビリテーション

津田 英一, 三浦 和知, 古川 正和, 石橋 恭之, 山本 祐司, 木村 由佳

The Japanese Journal of Rehabilitation Medicine   56 ( 秋季特別号 )   S147 - S147   2019.10

Core-Muscle Training and Neuromuscular Control of the Lower Limb and Trunk

Shizuka Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yuka Kimura, Yuki Fujita, Yasuyuki Ishibashi

Journal of Athletic Training   54 ( 9 )   959 - 969   2019.9

Core-Muscle Training and Neuromuscular Control of the Lower Limb and Trunk.

Shizuka Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yuka Kimura, Yuki Fujita, Yasuyuki Ishibashi

Journal of athletic training   54 ( 9 )   959 - 969   2019.9

Suture passerを用いたall-inside法による外側半月板修復術の短期成績

石橋 恭太, 木村 由佳, 佐々木 静, 山本 祐司, 津田 英一, 石橋 恭之

東北膝関節研究会会誌   28 ( 0 )   21 - 24   2019.7

Biomechanical analysis of medial patellofemoral ligament reconstruction: FiberTape® with knotless anchors versus a semitendinosus tendon autograft with soft anchors.

Takahiro Tsushima, Harehiko Tsukada, Shizuka Sasaki, Takuya Naraoka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   24 ( 4 )   663 - 667   2019.7

Biomechanical analysis of medial patellofemoral ligament reconstruction: FiberTape® with knotless anchors versus a semitendinosus tendon autograft with soft anchors

Takahiro Tsushima, Harehiko Tsukada, Shizuka Sasaki, Takuya Naraoka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi

Journal of Orthopaedic Science   24 ( 4 )   663 - 667   2019.7

Symptomatic bone marrow lesions induced by reduced bone mineral density in middle-aged women: a cross-sectional Japanese population study.

Seiya Ota, Daisuke Chiba, Eiji Sasaki, Gentaro Kumagai, Yuji Yamamoto, Shigeyuki Nakaji, Eiichi Tsuda, Yasuyuki Ishibashi

Arthritis research & therapy   21 ( 1 )   113 - 113   2019.5

連載 X線診断Q & A X線診断Q&A

山本 祐司

整形外科   70 ( 4 )   359 - 360   2019.4

Apophysitis of the greater trochanter in adolescent athletes: A report of 4 cases

Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yasuyuki Ishibashi

Journal of Orthopaedic Science   24 ( 2 )   373 - 376   2019.3

The coincidence of preoperative planning for stem size in total hip arthroplasty: comparison between two-dimensional planning and three-dimensional planning

ISHIBASHI Kyota, HARADA Yoshifumi, YAMAMOTO Yuji, ISHIBASHI Yasuyuki

Journal of the Eastern Japan Association of Orthopaedics and Traumatology   31 ( 2 )   151 - 154   2019

Greater Laxity in the Anterior Cruciate Ligament-Injured Knee Carries a Higher Risk of Postreconstruction Pivot Shift: Intraoperative Measurements With a Navigation System.

Yuji Yamamoto, Eiichi Tsuda, Shugo Maeda, Takuya Naraoka, Yuka Kimura, Daisuke Chiba, Yasuyuki Ishibashi

The American journal of sports medicine   46 ( 12 )   2859 - 2864   2018.10

Does Remnant Preservation Influence Tibial Tunnel Enlargement or Graft-to-Bone Integration After Double-Bundle Anterior Cruciate Ligament Reconstruction Using Hamstring Autografts and Suspensory Fixation? A Computed Tomography and Magnetic Resonance Imaging Evaluation

Takuya Naraoka, Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Yasuyuki Ishibashi

Orthopaedic Journal of Sports Medicine   6 ( 8 )   232596711879023 - 232596711879023   2018.8

Does Remnant Preservation Influence Tibial Tunnel Enlargement or Graft-to-Bone Integration After Double-Bundle Anterior Cruciate Ligament Reconstruction Using Hamstring Autografts and Suspensory Fixation? A Computed Tomography and Magnetic Resonance Imaging Evaluation.

Takuya Naraoka, Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Yasuyuki Ishibashi

Orthopaedic journal of sports medicine   6 ( 8 )   2325967118790238 - 2325967118790238   2018.8

青森県における若年者変形性膝関節症の発生について

太田 聖也, 千葉 大輔, 佐々木 英嗣, 佐々木 静, 木村 由佳, 山本 祐司, 石橋 恭之, 津田 英一

東北膝関節研究会会誌   27 ( 0 )   57 - 57   2018.7

片脚スクワット動作のキネマティクス評価における3次元電磁気センサーの有用性

佐々木 静, 千葉 大輔, 木村 由佳, 山本 祐司, 津田 英一, 石橋 恭之

JOSKAS   43 ( 4 )   533 - 533   2018.5

Age-related reduction of trunk muscle torque and prevalence of trunk sarcopenia in community-dwelling elderly: Validity of a portable trunk muscle torque measurement instrument and its application to a large sample cohort study

Eiji Sasaki, Shizuka Sasaki, Daisuke Chiba, Yuji Yamamoto, Atsushi Nawata, Eiichi Tsuda, Shigeyuki Nakaji, Yasuyuki Ishibashi

PLOS ONE   13 ( 2 )   e0192687 - e0192687   2018.2

Age-related reduction of trunk muscle torque and prevalence of trunk sarcopenia in community-dwelling elderly: Validity of a portable trunk muscle torque measurement instrument and its application to a large sample cohort study.

Eiji Sasaki, Shizuka Sasaki, Daisuke Chiba, Yuji Yamamoto, Atsushi Nawata, Eiichi Tsuda, Shigeyuki Nakaji, Yasuyuki Ishibashi

PloS one   13 ( 2 )   e0192687 - e0192687   2018.2

中手骨疲労骨折の治療経験

西川 かれん, 木村 由佳, 佐々木 静, 山本 祐司, 津田 英一, 石橋 恭之, 西川 真史

青森県スポーツ医学研究会誌   26   5 - 9   2018.1

Open reduction and Salter innominate osteotomy for developmental dysplasia of the hip diagnosed at 3 years and 6 months: A case report

KARITA Yukiko, YAMAMOTO Yuji, INOUE Ryo, HARADA Yoshifumi, SAISU Takashi, ISHIBASHI Yasuyuki

Journal of the Eastern Japan Association of Orthopaedics and Traumatology   30 ( 4 )   605 - 608   2018

Atypical femoral fracture after receiving antiresorptive drugs in breast cancer patients with bone metastasis.

Seiya Ota, Ryo Inoue, Takashi Shiozaki, Yuji Yamamoto, Naoki Hashimoto, On Takeda, Kei Yoshikawa, Junji Ito, Yasuyuki Ishibashi

Breast cancer (Tokyo, Japan)   24 ( 4 )   601 - 607   2017.7

Atypical femoral fracture after receiving antiresorptive drugs in breast cancer patients with bone metastasis

Seiya Ota, Ryo Inoue, Takashi Shiozaki, Yuji Yamamoto, Naoki Hashimoto, On Takeda, Kei Yoshikawa, Junji Ito, Yasuyuki Ishibashi

Breast Cancer   24 ( 4 )   601 - 607   2017.7

バスケットボールによる膝前十字靱帯損傷の受傷状況調査

森 未聖, 山本 祐司, 奈良岡 琢哉, 木村 由佳, 佐々木 静, 石橋 恭之, 津田 英一

東北整形災害外科学会雑誌   60 ( 1 )   182 - 182   2017.6

Is Remnant Preservation Truly Beneficial to Anterior Cruciate Ligament Reconstruction Healing? Clinical and Magnetic Resonance Imaging Evaluations of Remnant-Preserved Reconstruction.

Takuya Naraoka, Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Yasuyuki Ishibashi

The American journal of sports medicine   45 ( 5 )   1049 - 1058   2017.4

Characteristics of elongated and ruptured anterior cruciate ligament grafts: An analysis of 21 consecutive revision cases.

Kohei Iio, Eiichi Tsuda, Harehiko Tsukada, Yuji Yamamoto, Shugo Maeda, Takuya Naraoka, Yuka Kimura, Yasuyuki Ishibashi

Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology   8   1 - 7   2017.4

Characteristics of elongated and ruptured anterior cruciate ligament grafts: An analysis of 21 consecutive revision cases

Kohei Iio, Eiichi Tsuda, Harehiko Tsukada, Yuji Yamamoto, Shugo Maeda, Takuya Naraoka, Yuka Kimura, Yasuyuki Ishibashi

Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology   8   1 - 7   2017.4

Is Remnant Preservation Truly Beneficial to Anterior Cruciate Ligament Reconstruction Healing? Clinical and Magnetic Resonance Imaging Evaluations of Remnant-Preserved Reconstruction

Takuya Naraoka, Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Yasuyuki Ishibashi

The American Journal of Sports Medicine   45 ( 5 )   1049 - 1058   2017.4

Association of clinical and radiographic signs of femoroacetabular impingement in the general population.

Ryota Yamauchi, Ryo Inoue, Daisuke Chiba, Yuji Yamamoto, Yoshifumi Harada, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   22 ( 1 )   94 - 98   2017.1

All-physeal sparing法による二重束前十字靱帯再建術後に大腿骨側ボタンが関節内に脱落した3例

木村 由佳, 山本 祐司, 奈良岡 琢哉, 津田 英一, 石橋 恭之

スポーツ傷害   22   6 - 8   2017.1

Association of clinical and radiographic signs of femoroacetabular impingement in the general population

Ryota Yamauchi, Ryo Inoue, Daisuke Chiba, Yuji Yamamoto, Yoshifumi Harada, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

Journal of Orthopaedic Science   22 ( 1 )   94 - 98   2017.1

Apophysitis of the greater trochanter in adolescent athletes: A report of 4 cases.

Yuka Kimura, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   2016.12

Quantification of the pivot-shift test using a navigation system with non-invasive surface markers.

Shugo Maeda, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yuka Kimura, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   24 ( 11 )   3612 - 3618   2016.11

Quantification of the pivot-shift test using a navigation system with non-invasive surface markers

Shugo Maeda, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yuka Kimura, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   24 ( 11 )   3612 - 3618   2016.11

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system.

Yuki Fujita, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yuka Kimura, Shizuka Sasaki, Yasuyuki Ishibashi

The Knee   23 ( 4 )   604 - 609   2016.8

Quantitative analysis of dynamic patellar tracking in patients with lateral patellar instability using a simple video system

Yuki Fujita, Eiichi Tsuda, Yuji Yamamoto, Takuya Naraoka, Yuka Kimura, Shizuka Sasaki, Yasuyuki Ishibashi

The Knee   23 ( 4 )   604 - 609   2016.8

論究 新しく開発した簡易型脛骨前方移動量測定装置の有用性

木村 由佳, 津田 英一, 平賀 康晴, 山本 祐司, 奈良岡 琢哉, 石橋 恭之

整形･災害外科   59 ( 7 )   985 - 989   2016.6

大腿骨転子間彎曲内反骨切り術後に人工股関節置換術を施行した1例

新戸部 陽士郎, 山本 祐司, 田中 大, 黒瀬 理恵, 井上 亮, 石橋 恭之

東北整形災害外科学会雑誌   59 ( 1 )   216 - 217   2016.6

Hyaluronic acid induces the release of growth factors from platelet-rich plasma

Iio K, Furukawa K, Tsuda E, Yamamoto Y, Maeda S, Naraoka T, Kimura Y, Ishibashi Y

Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology   2016.4

Hyaluronic acid induces the release of growth factors from platelet-rich plasma

Kohei Iio, Ken-Ichi Furukawa, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Takuya Naraoka, Yuka Kimura, Yasuyuki Ishibashi

Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology   4   27 - 32   2016.4

Prospective Randomized Study of Objective and Subjective Clinical Results Between Double-Bundle and Single-Bundle Anterior Cruciate Ligament Reconstruction

Shizuka Sasaki, Eiichi Tsuda, Yasuharu Hiraga, Yuji Yamamoto, Shugo Maeda, Eiji Sasaki, Yasuyuki Ishibashi

The American Journal of Sports Medicine   44 ( 4 )   855 - 864   2016.4

Prospective Randomized Study of Objective and Subjective Clinical Results Between Double-Bundle and Single-Bundle Anterior Cruciate Ligament Reconstruction.

Shizuka Sasaki, Eiichi Tsuda, Yasuharu Hiraga, Yuji Yamamoto, Shugo Maeda, Eiji Sasaki, Yasuyuki Ishibashi

The American journal of sports medicine   2016.2

The Knee injury and Osteoarthritis Outcome Score reflects the severity of knee osteoarthritis better than the revised Knee Society Score in a general Japanese population.

Kazuki Oishi, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Eiji Sasaki, Daisuke Chiba, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

The Knee   23 ( 1 )   35 - 42   2016.1

The Knee injury and Osteoarthritis Outcome Score reflects the severity of knee osteoarthritis better than the revised Knee Society Score in a general Japanese population

Kazuki Oishi, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Eiji Sasaki, Daisuke Chiba, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

The Knee   23 ( 1 )   35 - 42   2016.1

関節外矯正骨切りを併用したナビゲーション人工膝関節置換術の3例

太田 聖也, 津田 英一, 山本 祐司, 奈良岡 琢哉, 木村 由佳, 石橋 恭之

東北膝関節研究会会誌   25 ( 0 )   45 - 49   2016

Serum hyaluronic acid concentration predicts the progression of joint space narrowing in normal knees and established knee osteoarthritis – a five-year prospective cohort study

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Ryo Inoue, Daisuke Chiba, Hiroshi Fujita, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji, Yasuyuki Ishibashi

Arthritis Research & Therapy   17 ( 1 )   283 - 283   2015.12

Serum hyaluronic acid concentration predicts the progression of joint space narrowing in normal knees and established knee osteoarthritis - a five-year prospective cohort study.

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Ryo Inoue, Daisuke Chiba, Hiroshi Fujita, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji, Yasuyuki Ishibashi

Arthritis research & therapy   17   283 - 283   2015.10

Intraoperative laxity measurements using a navigation system in anatomical double-bundle posterior cruciate ligament reconstruction.

Yuka Kimura, Eiichi Tsuda, Yasuharu Hiraga, Yuji Yamamoto, Shugo Maeda, Yasuyuki Ishibashi

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   23 ( 10 )   3085 - 3093   2015.10

Intraoperative laxity measurements using a navigation system in anatomical double-bundle posterior cruciate ligament reconstruction

Yuka Kimura, Eiichi Tsuda, Yasuharu Hiraga, Yuji Yamamoto, Shugo Maeda, Yasuyuki Ishibashi

Knee Surgery, Sports Traumatology, Arthroscopy   23 ( 10 )   3085 - 3093   2015.10

膝蓋骨疲労骨折の4例

奈良岡 琢哉, 津田 英一, 山本 祐司, 前田 周吾, 木村 由佳, 石橋 恭之

東北膝関節研究会会誌   24 ( 0 )   35 - 38   2015.7

Histological evaluation of low-intensity pulsed ultrasound on osteochondritis dissecans of the humeral capitellum

Maeda S, Tsuda E, Mizukami H, Yamamoto Y, Inaba W, Sasaki N, Ishibashi Y

Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology   02 ( 02 )   56 - 62   2015.4

Histological evaluation of low-intensity pulsed ultrasound on osteochondritis dissecans of the humeral capitellum

Shugo Maeda, Eiichi Tsuda, Hiroki Mizukami, Yuji Yamamoto, Wataru Inaba, Norihiro Sasaki, Yasuyuki Ishibashi

Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology   2 ( 2 )   56 - 62   2015.4

Ellis-van Creveld症候群に伴う膝蓋骨脱臼に対する手術経験

藤田 有紀, 津田 英一, 山本 祐司, 前田 周吾, 奈良岡 琢哉, 木村 由佳, 石橋 恭之

東北膝関節研究会会誌   24 ( 0 )   47 - 51   2015

Severe valgus knee deformity caused by chondronecrosis after using a radiofrequency device

Norihiro Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yasuyuki Ishibashi

Journal of Orthopaedic Science   19 ( 6 )   1046 - 1050   2014.11

思春期児童におけるジャンプ着地動作中の下肢アライメントと体幹・下肢筋力の関連

佐々木 静, 津田 英一, 山本 祐司, 前田 周吾, 奈良岡 琢哉, 木村 由佳, 藤田 有紀, 石橋 恭之

日本臨床スポーツ医学会誌   22 ( 4 )   S124 - S124   2014.10

外側円板状半月手術後に生じた大腿骨外顆骨軟骨病変に関するMRI画像の検討

木村 由佳, 津田 英一, 山本 祐司, 前田 周吾, 奈良岡 琢哉, 藤田 有紀, 石橋 恭之

東日本整形災害外科学会雑誌   26 ( 3 )   258 - 258   2014.8

Nocturnal knee pain increases with the severity of knee osteoarthritis, disturbing patient sleep quality.

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Ryo Inoue, Daisuke Chiba, Noriyuki Okubo, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

Arthritis care & research   66 ( 7 )   1027 - 1032   2014.7

Nocturnal Knee Pain Increases With the Severity of Knee Osteoarthritis, Disturbing Patient Sleep Quality

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Ryo Inoue, Daisuke Chiba, Noriyuki Okubo, Ippei Takahashi, Shigeyuki Nakaji, Yasuyuki Ishibashi

Arthritis Care & Research   66 ( 7 )   1027 - 1032   2014.7

Relationship between patient-based outcome score and conventional objective outcome scales in post-operative total knee arthroplasty patients.

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Meada, Hironori Otsuka, Yasuyuki Ishibashi

International orthopaedics   38 ( 2 )   373 - 378   2014.2

Relationship between patient-based outcome score and conventional objective outcome scales in post-operative total knee arthroplasty patients

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Meada, Hironori Otsuka, Yasuyuki Ishibashi

International Orthopaedics   38 ( 2 )   373 - 378   2014.2

スポーツ選手の離断性骨軟骨炎に対する吸収ピンによる骨軟骨片固定術の臨床成績

大石 和生, 津田 英一, 平賀 康晴, 山本 祐司, 前田 周吾, 石橋 恭之

東北膝関節研究会会誌   23 ( 0 )   55 - 58   2014

Change with increasing age in control of the lower limbs during jump-landing in adolescents: a 5-year prospective study.

Shizuka Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yoshimitsu Hayashi, Yuka Kimura, Eiji Sasaki, Yuki Fujita, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   18 ( 5 )   774 - 781   2013.9

Change with increasing age in control of the lower limbs during jump–landing in adolescents: a 5-year prospective study

Shizuka Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yoshimitsu Hayashi, Yuka Kimura, Eiji Sasaki, Yuki Fujita, Yasuyuki Ishibashi, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji

Journal of Orthopaedic Science   18 ( 5 )   774 - 781   2013.9

Severe valgus knee deformity caused by chondronecrosis after using a radiofrequency device.

Norihiro Sasaki, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Yasuyuki Ishibashi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   2013.5

Accuracy of image-free computer navigated total knee arthroplasty is not compromised in severely deformed varus knees.

Keiichiro Maniwa, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Ryo Inoue, Hironori Otsuka

The Journal of arthroplasty   28 ( 5 )   802 - 806   2013.5

Serum hyaluronan levels increase with the total number of osteoarthritic joints and are strongly associated with the presence of knee and finger osteoarthritis.

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Koei Iwasaki, Ryo Inoue, Ippei Takahashi, Kaori Sawada, Hiroshi Fujita, Takashi Umeda, Shigeyuki Nakaji, Yasuyuki Ishibashi

International orthopaedics   37 ( 5 )   925 - 930   2013.5

Accuracy of Image-Free Computer Navigated Total Knee Arthroplasty Is Not Compromised in Severely Deformed Varus Knees

Keiichiro Maniwa, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Ryo Inoue, Hironori Otsuka

The Journal of Arthroplasty   28 ( 5 )   802 - 806   2013.5

Serum hyaluronan levels increase with the total number of osteoarthritic joints and are strongly associated with the presence of knee and finger osteoarthritis

Eiji Sasaki, Eiichi Tsuda, Yuji Yamamoto, Koei Iwasaki, Ryo Inoue, Ippei Takahashi, Kaori Sawada, Hiroshi Fujita, Takashi Umeda, Shigeyuki Nakaji, Yasuyuki Ishibashi

International Orthopaedics   37 ( 5 )   925 - 930   2013.5

Periodic knee injections of collagen tripeptide delay cartilage degeneration in rabbit experimental osteoarthritis.

Takuya Naraoka, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Tomomi Kusumi, Satoshi Toh

Arthritis research & therapy   15 ( 1 )   R32 - R32   2013.2

Evaluation of locomotive disability using loco-check: a cross-sectional study in the Japanese general population.

Eiji Sasaki, Yasuyuki Ishibashi, Eiichi Tsuda, Atsushi Ono, Yuji Yamamoto, Ryo Inoue, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association   18 ( 1 )   121 - 129   2013.1

Evaluation of locomotive disability using loco-check: a cross-sectional study in the Japanese general population

Eiji Sasaki, Yasuyuki Ishibashi, Eiichi Tsuda, Atsushi Ono, Yuji Yamamoto, Ryo Inoue, Ippei Takahashi, Takashi Umeda, Shigeyuki Nakaji

Journal of Orthopaedic Science   18 ( 1 )   121 - 129   2013.1

Periodic knee injections of collagen tripeptide delay cartilage degeneration in rabbit experimental osteoarthritis

Takuya Naraoka, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Tomomi Kusumi, Satoshi Toh

Arthritis Research & Therapy   15 ( 1 )   R32 - R32   2013

思春期における着地動作中の動的下肢アライメントの経時的変化

佐々木 静, 澤田 英一, 山本 祐司

日本臨床バイオメカニクス学会誌   11   325 - 3   2013

Relationship between Serum Hyaluronan Levels and Knee Symptoms in Osteoarthritis Patients –A Three-year Prospective Study–

SASAKI Eiji

Japanese Journal of Joint Diseases   32 ( 4 )   441 - 448   2013

コアマッスルトレーニングが片脚スクワットにおける下肢体幹の神経筋コントロールに及ぼす効果

佐々木 静, 澤田 英一, 山本 祐司

日本臨床スポーツ医学会誌   21   756 - 62   2013

Biomechanical comparison between single-bundle and double-bundle anterior cruciate ligament reconstruction with hamstring tendon under cyclic loading condition

Shuya Nohmi, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Harehiko Tsukada, Satoshi Toh

Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology   4 ( 1 )   23 - 23   2012.12

アスリートの半月板損傷に対する治療　部分切除術vs縫合術

山本祐司、津田英一、石橋恭之

臨床スポーツ医学   29 ( 10 )   1021 - 1025   2012.10

Incidence and radiologic predictor of postoperative patellar instability after Fulkerson procedure of the tibial tuberosity for recurrent patellar dislocation.

Eiichi Tsuda, Yasuyuki Ishibashi, Yuji Yamamoto, Shugo Maeda

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA   20 ( 10 )   2062 - 2070   2012.10

Time-dependent gene expression and immunohistochemical analysis of the injured anterior cruciate ligament.

T Naraoka, Y Ishibashi, E Tsuda, Y Yamamoto, T Kusumi, I Kakizaki, S Toh

Bone & joint research   1 ( 10 )   238 - 244   2012.10

Incidence and radiologic predictor of postoperative patellar instability after Fulkerson procedure of the tibial tuberosity for recurrent patellar dislocation

Eiichi Tsuda, Yasuyuki Ishibashi, Yuji Yamamoto, Shugo Maeda

Knee Surgery, Sports Traumatology, Arthroscopy   20 ( 10 )   2062 - 2070   2012.10

Time-dependent gene expression and immunohistochemical analysis of the injured anterior cruciate ligament

T. Naraoka, Y. Ishibashi, E. Tsuda, Y. Yamamoto, T. Kusumi, I. Kakizaki, S. Toh

Bone & Joint Research   1 ( 10 )   238 - 244   2012.10

The femoral insertion of the anterior cruciate ligament: discrepancy between macroscopic and histological observations.

Norihiro Sasaki, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Hiroki Mizukami, Satoshi Toh, Soroku Yagihashi, Yoshikazu Tonosaki

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association   28 ( 8 )   1135 - 1146   2012.8

The Femoral Insertion of the Anterior Cruciate Ligament: Discrepancy Between Macroscopic and Histological Observations

Norihiro Sasaki, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Shugo Maeda, Hiroki Mizukami, Satoshi Toh, Soroku Yagihashi, Yoshikazu Tonosaki

Arthroscopy: The Journal of Arthroscopic & Related Surgery   28 ( 8 )   1135 - 1146   2012.8

Biomechanical comparison between single-bundle and double-bundle anterior cruciate ligament reconstruction with hamstring tendon under cyclic loading condition.

Shuya Nohmi, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Harehiko Tsukada, Satoshi Toh

Sports medicine, arthroscopy, rehabilitation, therapy & technology : SMARTT   4 ( 1 )   23 - 23   2012.7

Post injury changes in the properties of mesenchymal stem cells derived from human anterior cruciate ligaments.

Shuya Nohmi, Yuji Yamamoto, Hiroki Mizukami, Yasuyuki Ishibashi, Eiichi Tsuda, Keiichiro Maniwa, Soroku Yagihashi, Shigeru Motomura, Satoshi Toh, Ken-Ichi Furukawa

International orthopaedics   36 ( 7 )   1515 - 1522   2012.7

Post injury changes in the properties of mesenchymal stem cells derived from human anterior cruciate ligaments

Shuya Nohmi, Yuji Yamamoto, Hiroki Mizukami, Yasuyuki Ishibashi, Eiichi Tsuda, Keiichiro Maniwa, Soroku Yagihashi, Shigeru Motomura, Satoshi Toh, Ken-Ichi Furukawa

International Orthopaedics   36 ( 7 )   1515 - 1522   2012.7

Investigation of anterior cruciate ligament injury mechanism in basketball using a self-completed questionnaire

SASAKI Shizuka, ISHIBASHI Yasuyuki, TSUDA Eiichi, YAMAMOTO Yuji, MAEDA Shugo, KIMURA Yuka, TOH Satoshi

37 ( 3 )   637 - 642   2012.6

Relationship between knee osteoarthritis and varus alignment in the Japanese general population

SASAKI Eiji, ISHIBASHI Yasuyuki, TSUDA Eiichi, YAMAMOTO Yuji, INOUE Ryo, TOH Satoshi

37 ( 3 )   542 - 547   2012.6

反復性膝蓋骨脱臼に対する脛骨粗面前内方移行術

山本祐司、石橋恭之、津田英一

関節外科   31 ( 3 )   74 - 80   2012.3

Increased knee valgus alignment and moment during single-leg landing after overhead stroke as a potential risk factor of anterior cruciate ligament injury in badminton

Yuka Kimura, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Yoshimitsu Hayashi, Shuichi Sato

British Journal of Sports Medicine   46 ( 3 )   207 - 213   2012.3

Biomechanical evaluation of an anatomic double-bundle posterior cruciate ligament reconstruction.

Harehiko Tsukada, Yasuyuki Ishibashi, Eiichi Tsuda, Akira Fukuda, Yuji Yamamoto, Satoshi Toh

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association   28 ( 2 )   264 - 271   2012.2

Biomechanical Evaluation of an Anatomic Double-Bundle Posterior Cruciate Ligament Reconstruction

Harehiko Tsukada, Yasuyuki Ishibashi, Eiichi Tsuda, Akira Fukuda, Yuji Yamamoto, Satoshi Toh

Arthroscopy: The Journal of Arthroscopic & Related Surgery   28 ( 2 )   264 - 271   2012.2

外反膝に対するTKA/HTOからのconversion TKA　外反膝および高位脛骨骨切り術後膝に対するナビゲーションTKA

山本祐司, 石橋恭之, 津田英一, 前田周吾, 間庭敬一郎, 大塚博徳, 藤哲

日本人工関節学会誌   40   20 - 21   2011.12

Medical problems and risk factors of metabolic syndrome among radiographic knee osteoarthritis patients in the Japanese general population

Inoue R, Ishibashi Y, Tsuda E, Yamamoto Y, Matsuzaka M, Takahashi I, Danjo K, Umeda T, Nakaji S, Toh S

Journal of orthopaedic science   16 ( 6 )   704 - 709   2011.11

Medical problems and risk factors of metabolic syndrome among radiographic knee osteoarthritis patients in the Japanese general population

Ryo Inoue, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Satoshi Toh, Masashi Matsuzaka, Ippei Takahashi, Kazuma Danjo, Takashi Umeda, Shigeyuki Nakaji

Journal of Orthopaedic Science   16 ( 6 )   704 - 709   2011.11

Osteochondral Autograft Transplantation for Advanced Stage Freiberg Disease in Adolescent Athletes

Eiichi Tsuda, Yasuyuki Ishibashi, Yuji Yamamoto, Shugo Maeda, Yuka Kimura, Hideki Sato

The American Journal of Sports Medicine   39 ( 11 )   2470 - 2475   2011.11

後十字靱帯温存型人工膝関節置換術のナビゲーションによる関節ギャップ評価　大腿骨骨切り前後の比較

山本祐司, 石橋恭之, 津田英一, 前田周吾, 大塚博徳

臨床バイオメカニクス   32   323 - 327   2011.10

後十字靱帯温存型人工膝関節置換術の関節ギャップ計測　膝蓋大腿関節整復の影響

山本祐司, 石橋恭之, 津田英一, 大塚博徳, 藤哲

臨床バイオメカニクス   32   335 - 338   2011.10

私が薦めるACL損傷からの競技復帰プラン ACL再建術後における中高生スポーツ選手の復帰と問題点

石橋 恭之, 津田 英一, 山本 祐司, 木村 由佳, 塚本 利昭, 伊藤 郁恵, 瓜田 一貴, 藤 哲

日本臨床スポーツ医学会誌   19 ( 4 )   S87 - S87   2011.10

Intraoperative navigation evaluation of tibial translation after resection of anterior cruciate ligament remnants.

Maeda S, Ishibashi Y, Tsuda E, Yamamoto Y, Toh S.

Arthroscopy   27 ( 9 )   1203 - 1210   2011.9

Intraoperative navigation evaluation of tibial translation after resection of anterior cruciate ligament remnants.

Shugo Maeda, Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Satoshi Toh

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association   27 ( 9 )   1203 - 10   2011.9

Comparison between Evaluations of the Glenoid Concavity by Double Oblique Axial MR Arthrography and Clinical Results in Arthroscopic Bankart Repair

46 ( 5 )   455 - 461   2011.5

Comparison of conservative treatment and surgical treatment for posterior cruciate ligament tears

SASAKI Norihiro, ISHIBASHI Yasuyuki, TSUDA Eiichi, YAMAMOTO Yuji, MAEDA Shugo, TOH Satoshi

23 ( 1 )   49 - 57   2011.3

前十字靱帯再再建術のup to date 二重束前十字靱帯再建術後に再再建術に至った要因の検討

津田 英一, 石橋 恭之, 山本 祐司, 前田 周吾, 木村 由佳, 佐々木 静, 藤 哲

日本整形外科学会雑誌   85 ( 2 )   S226 - S226   2011.2

Stress fractures in sports

NOHMI S., ISHIBASHI Y., TSUDA E., YAMAMOTO Y., TSUKADA H., TOH S.

Japanese journal of clinical sports medicine   19 ( 1 )   43 - 49   2011.1

Knee osteoarthritis, knee joint pain and aging in relation to increasing serum hyaluronan level in the Japanese population

Inoue R, Ishibashi Y, Tsuda E, Yamamoto Y, Matsuzaka M, Takahashi I, Danjo K, Umeda T, Nakaji S, Toh S

Osteoarthritis and cartilage   19 ( 1 )   51 - 57   2011.1

再手術を要した上腕骨小頭離断性骨軟骨炎の一例

山本祐司, 石橋恭之, 津田英一, 前田周吾, 藤哲

スポーツ傷害   16   23 - 25   2011.1

Knee osteoarthritis, knee joint pain and aging in relation to increasing serum hyaluronan level in the Japanese population

R. Inoue, Y. Ishibashi, E. Tsuda, Y. Yamamoto, M. Matsuzaka, I. Takahashi, K. Danjo, T. Umeda, S. Nakaji, S. Toh

Osteoarthritis and Cartilage   19 ( 1 )   51 - 57   2011.1

Comparison between the effect of collagen tripeptide and sodium hyaluronan to prevent knee osteoarthritis: a preliminary in vivo study

Naraoka Takuya, Ishibashi Yasuyuki, Tsuda Eiichi, Yamamoto Yuji, Kusumi Tomomi, Toh Satoshi

Hirosaki Medical Journal   62 ( 2-4 )   107 - 116   2011

縫合術併用形成的部分切除術の治療成績

間庭 敬一郎, 石橋 恭之, 津田 英一, 山本 祐司, 前田 周吾

東北膝関節研究会会誌   21 ( 0 )   29 - 32   2011

小中学生の腰痛\スポーツ活動との関連

山本 祐司, 石橋 恭之, 澤田 英一, 前田 周吾, 井上 亮

青森スポ研誌   19   1 - 8   2011

Mechanisms for anterior cruciate ligament injuries in badminton

Y. Kimura, Y. Ishibashi, E. Tsuda, Y. Yamamoto, H. Tsukada, S. Toh

British Journal of Sports Medicine   44 ( 15 )   1124 - 1127   2010.12

肩甲部痛を主訴とした第1肋骨疲労骨折の2例

佐々木規博, 石橋恭之, 津田英一, 山本祐司, 前田周吾, 藤哲

青森県スポーツ医学研究会誌   19   23 - 26   2010.12

テニス選手に発生した第2中手骨疲労骨折の1例

木村由佳, 石橋恭之, 津田英一, 山本祐司, 前田周吾, 藤哲

青森県スポーツ医学研究会誌   19   27 - 29   2010.12

小中学生の腰痛　スポーツ活動との関連

山本祐司, 石橋恭之, 津田英一, 前田周吾, 井上亮, 高橋一平, 檀上和真, 梅田孝, 中路重之, 藤哲

青森県スポーツ医学研究会誌   19   1 - 4   2010.12

Mechanisms for anterior cruciate ligament injuries in badminton

Kimura Y, Ishibashi Y, Tsuda E, Yamamoto Y, Tsukada H, Toh S

British journal of sports medicine   44 ( 15 )   1124 - 1127   2010.12

Comparison between clinical grading and navigation data of knee laxity in ACL-deficient knees

Yuji Yamamoto, Yasuyuki Ishibashi, Eiichi Tsuda, Harehiko Tsukada, Shugo Maeda, Satoshi Toh

Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology   2   27 - 27   2010.11

Windswept deformityに対しTKAとHTOを同時に施行した2例

塩崎 崇, 大塚 博徳, 竹内 和成, 山本 祐司

東北膝関節研究会会誌   20 ( 0 )   15 - 19   2010.7

形成的部分切除を行った内側円板状半月の1例

千葉 大輔, 石橋 恭之, 津田 英一, 山本 祐司, 佐々木 知行

東北膝関節研究会会誌   20 ( 0 )   53 - 56   2010.7

Opening wedge高位脛骨骨切り術の短期治療成績と成績関連因子

山本祐司，石橋恭之，津田英一，木村由佳，井上亮，藤哲

東日本整形災害外科学会雑誌   22 ( 2 )   136 - 141   2010.6

Tunnel position and relationship to postoperative knee laxity after double-bundle anterior cruciate ligament reconstruction with a transtibial technique

Tsuda E, Ishibashi Y, Fukuda A, Yamamoto Y, Tsukada H, Ono S

The American journal of sports medicine   38 ( 4 )   698 - 706   2010.4

Tunnel Position and Relationship to Postoperative Knee Laxity after Double-Bundle Anterior Cruciate Ligament Reconstruction with a Transtibial Technique

Eiichi Tsuda, Yasuyuki Ishibashi, Akira Fukuda, Yuji Yamamoto, Harehiko Tsukada, Shuichi Ono

The American Journal of Sports Medicine   38 ( 4 )   698 - 706   2010.4

同側の上腕骨小頭と滑車に発生した離断性骨軟骨炎の1例

木村由佳, 石橋恭之, 津田英一, 山本祐司, 塚田晴彦, 藤哲

東日本整形災害外科学会雑誌   22 ( 1 )   72 - 75   2010.3

投球障害肩と野球肘における投球フォームの比較

塚本利昭, 伊藤郁恵, 瓜田一貴, 石橋恭之, 津田英一, 山本祐司, 対馬栄輝, 佐藤英樹

青森県スポーツ医学研究会誌   18   5 - 10   2009.12

下肢伸展挙上テスト陽性を認めた成長期スポーツ選手の腰椎疲労骨折

浅利享, 石橋恭之, 津田英一, 小野睦, 山本祐司, 藤哲

青森県スポーツ医学研究会誌   18   15 - 19   2009.12

特集 CT・MRIアトラス Update-正常解剖と読影のポイント 骨軟部 各論 肩関節の疾患

佐々木 泰輔, 山本 祐司

medicina   46 ( 12 )   390 - 395   2009.11

中高年者における移動能力の低下と変形性膝関節症・肥満の関係

井上亮, 梅田孝, 小枝周平, 澄川幸志, 岩間孝暢, 塚本利昭, 山本祐司, 津田英一, 石橋恭之, 藤哲, 中路重之

体力・栄養・免疫学雑誌   19 ( 2 )   149 - 151   2009.11

PCL温存型人工膝関節置換術の屈曲ギャップ計測―ナビゲーションによる術中評価

山本祐司，石橋恭之，津田英一，塚田晴彦，大塚博徳，藤哲

臨床バイオメカニクス   30   357 - 361   2009.9

当科における膝前十字靱帯損傷予防の試み―動的下肢アライメント評価と予防トレーニングの効果

津田英一，石橋恭之，山本祐司，塚田晴彦，林充慶，木村由佳，藤哲，佐藤秀一

日本臨床スポーツ医学会誌   17 ( 3 )   429 - 434   2009.8

上腕骨小頭と滑車に発生した離断性骨軟骨炎の1例

木村 由佳, 石橋 恭之, 津田 英一, 山本 祐司, 塚田 晴彦, 藤 哲

東日本整形災害外科学会雑誌   21 ( 3 )   366 - 366   2009.8

脛骨プラトーに発生した離断性骨軟骨炎の一例

岩崎 宏貴, 石橋 恭之, 津田 英一, 山本 祐司, 塚田 晴彦, 藤 哲

東北膝関節研究会会誌   19 ( 0 )   37 - 40   2009.7

脛骨プラトーに発生した離断性骨軟骨炎の一例

岩崎宏貴, 石橋恭之, 津田英一, 山本祐司, 塚田晴彦, 藤哲

東北膝関節研究会会誌   19   37 - 40   2009.7

劇症型A群連鎖球菌感染症に陥った化膿性膝関節炎の1例

井上亮，山本祐司，佐々木斉

東北整形災害外科学会雑誌   53 ( 1 )   167 - 170   2009.6

人工膝関節置換術後に過伸展を呈した1例－Navigationを用いたrevision術中評価－

山本祐司，佐々木斉，井上亮

東北整形災害外科学会雑誌   53 ( 1 )   137 - 141   2009.6

Navigation Evaluation of the Pivot-Shift Phenomenon During Double-Bundle Anterior Cruciate Ligament Reconstruction: Is the Posterolateral Bundle More Important?

Ishibashi Y, Tsuda E, Yamamoto Y, Tsukada H, Toh S

Arthroscopy   25 ( 5 )   488 - 495   2009.5

Navigation Evaluation of the Pivot-Shift Phenomenon During Double-Bundle Anterior Cruciate Ligament Reconstruction: Is the Posterolateral Bundle More Important?

Yasuyuki Ishibashi, Eiichi Tsuda, Yuji Yamamoto, Harehiko Tsukada, Satoshi Toh

Arthroscopy: The Journal of Arthroscopic & Related Surgery   25 ( 5 )   488 - 495   2009.5

大腿骨髄内釘固定術後にナビゲーションによる人工膝関節置換術を行った1例

山本祐司，大塚博徳，中田善博，塩崎崇

膝   33 ( 2 )   411 - 414   2009.4

Lower Limb Valgus Alignment Compared With Two- and Three- Dimensional Motion Analysis During a Drop Jump Test

Hayashi Y, Ishibashi Y, Tsuda E, Yamamoto Y, Tsukada H, Kimura Y, Toh S

弘前医学   60 ( 1-4 )   77 - 85   2009.3

2次元および3次元動作解析法を用いたジャンプ着地動作中の下肢外反アライメントの比較(LOWER LIMB VALGUS ALIGNMENT COMPARED WITH TWO-AND THREE-DIMENSIONAL MOTION ANALYSIS DURING A DROP JUMP TEST)

林 慶充, 石橋 恭之, 津田 英一, 山本 祐司, 塚田 晴彦, 木村 由佳, 藤 哲

弘前医学   60 ( 1-4 )   77 - 85   2009.3

Lower limb valgus alignment compared with two- and three-dimensional motion analysis during a drop jump test

Hayashi Yoshimitsu, Ishibashi Yasuyuki, Tsuda Eiichi, Yamamoto Yuji, Tsukada Harehiko, Kimura Yuka, Toh Satoshi

Hirosaki Medical Journal   60 ( 1-4 )   77 - 85   2009

Validation of computer-assisted open-wedge high tibial osteotomy using three-dimensional navigation.

Yamamoto Y, Ishibashi Y, Tsuda E, Tsukada H, Kimura Y, Toh S

Orthopedics   31 ( 10 Suppl 1 )   2008.10

Single- versus double bundle anterior cruciate ligament reconstruction results using navigation. The Japanese experience

Yamamoto Y, Ishibashi Y, Tsuda E, Tsukada H, Toh S

Operative Techniques in Orthopaedics   18 ( 3 )   173 - 180   2008.7

Differences in Torsional Joint Stiffness of the Knee between Genders

Wei-Hsiu Hsu, Jesse A. Fisk, Yuji Yamamoto, Richard E. Debski, Savio L-Y. Woo

The American Journal of Sports Medicine   34 ( 5 )   765 - 770   2006.5

Osteochondral Autograft Transplantation for Osteochondritis Dissecans of the Capitellum in Nonthrowing Athletes

Eiichi Tsuda, Yasuyuki Ishibashi, Hideki Sato, Yuji Yamamoto, Satoshi Toh

Arthroscopy: The Journal of Arthroscopic & Related Surgery   21 ( 10 )   1270.e1 - 1270.e4   2005.10

両膝蓋骨脱臼を伴った変形性膝関節症に対する人工関節置換術の経験

山本 祐司, 石橋 恭之, 佐々木 和広, 佐藤 英樹, 藤 哲

東北膝関節研究会会誌   13 ( 0 )   41 - 44   2003.7

ゼロからはじめる！Knee Osteotomyアップデート

山本祐司, 石橋恭之（ Role： Joint author）

全日本病院出版社  2018.5 

Computer-assisted Navigation in ACL reconstruction. Intraoperative biomechanical evaluation using a navigation

Yuji Yamamoto, Yasuyuki Ishibashi（ Role： Joint author）

Springer Japan  2016.4 

スポーツ復帰のための手術　膝

山本祐司, 石橋恭之（ Role： Contributor）

メジカルビュー社  2016.2 

今日の治療指針

山本祐司（ Role： Sole author ,  整形外科疾患. 脱臼整復手技）

医学書院  2014 

運動器の痛みプライマリケア　膝・大腿部の痛み

山本祐司、石橋恭之（ Role： Joint author）

南江堂  2012.6 

運動器の痛みプライマリケア　肘・手の痛み

山本祐司、石橋恭之（ Role： Joint author）

南江堂  2011.7 

Textbook of Arthroscopy

Ishibashi Y, Yamamoto Y（ Role： Contributor）

Saunders  2004 

ざっくりわかる整形外科の手術 人工膝関節置換術

山本祐司

整形外科看護   2016.11

中学生・高校生におけるACL再建術後のスポーツ復帰の問題点

山本 祐司, 津田 英一, 佐々木 静, 石橋 恭之

臨床スポーツ医学   31   1022 - 1026   2014.11

前十字靱帯再建術のナビゲーション

山本 祐司,　津田 英一, 前田 周吾, 石橋 恭之

整形・災害外科   57 ( 10 )   1245 - 1250   2014.9

Relationship between patient-based outcome scores and conventional objective outcome scales in postoperative total knee arthroplasty patients

SASAKI Eiji, TSUDA Eiichi, YAMAMOTO Yuji, MAEDA Shugo, OTSUKA Hironori, INOUE Ryo, IIO Kohei, FUJITA Yuki, ISHIBASHI Yasuyuki

38 ( 3 )   516 - 521   2013.6

ナビゲーションを用いたACL再建術

山本祐司，石橋恭之

スキル関節鏡下手術アトラス　膝関節鏡下手術   310 - 316   2010.5

肩関節の疾患

佐々木泰輔，山本祐司

Medicina   64 ( 12 )   390 - 395   2009.11