Papers - CHOSA Etsuo
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Intracalvarial Penetration of a Halo Pin During Treatment of an Odentoid Fracture in an Elderly Patient: A Cace Report(共著) Reviewed
Hiroshi Kuroki, Takuya Hagai, Hideaki Hamanaka, Naoki Inomata, Kiyoshi Higa, Etsuo Chosa, Shinji Yamashita, Hideo Takeshima.
MEDICAL SCIENCE CASE REPORTS 2 58 - 63 2015.12
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.12659/MSCR.896183
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Clinical Results of Subacute and Chronic Atlantoaxial Rotatory Fixation Reviewed
Takuya Nagai, Hideaki Hamanaka, Naoki Inomata, Kiyoshi Higa, Lee Deok Cheol, Hiroyuki Imazato, Etsuo Chosa
6 ( 12 ) 1758 - 1760 2015.12
Language：Japanese Publishing type：Research paper (scientific journal)
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肩鎖関節脱臼に対する新しい手術デバイス+B42“Zip Tight”の使用経験
小島岳史, 岡村龍, 松岡篤, 黒田宏, 帖佐悦男
宮崎整形外科懇話会論文集 ( 20 ) 5 - 6 2015.12
Language：Japanese Publishing type：Research paper (scientific journal)
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人工股関節の緩みに対する臼蓋再建の治療戦略
戸田雅, 帖佐悦男, 坂本武郎, 渡邊信二, 関本朝久, 濱田浩朗, 池尻洋史, 中村嘉宏, 舩元太郎, 日吉優, 川野啓介, 斎藤由希子
宮崎整形外科懇話会論文集 ( 20 ) 65 - 66 2015.12
Language：Japanese Publishing type：Research paper (scientific journal)
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非定型大腿骨骨折の検討
小牧亘, 深野木快士, 濱田浩朗, 帖佐悦男
宮崎整形外科懇話会論文集 ( 20 ) 39 - 42 2015.12
Language：Japanese Publishing type：Research paper (scientific journal)
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OTSUKA Yuki, YAMAKO Go, DENG Gang, TOTORIBE Kouzi, CHOSA Etsuo, ISHIZAKA Naoto, WASA Motoki, FUJITA Masahiro
Mechanical Engineering Congress, Japan 2015 "J0230401 - 1"-"J0230401-3" 2015.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers
In total hip arthroplasty, the use of metal-on-metal bearings (MOM) had been increasing with expansion of demand for higher physical activities in young patients before clinical studies reported that metal ion release caused by wear leads to metal allergy and pseudotumour. Using ELID grinding system we have developed low friction and wear MOM to reduce these adverse reactions. The ELID system produces thick oxide layer on bearing surface that can inhibit metal ion release. The lubrication performance on friction and wear depends on geometric design and surface feature. Therefore, this study demonstrated the optimal clearance of the newly developed MOM for reducing metal ion release. We evaluated the influence of diametrical clearance on friction using a hip friction simulator. The nine φ36 mm femoral heads and 9 liners were prepared with 13 nm in roughness (Ra), and 2 μm in sphericity and were divided into three bearing groups based on the diametrical clearance (C_d = 20, 50, 70 μm). The frictional moment generated in each bearing under walking was measured and the frictional coefficient was calculated. The frictional coefficient decreased with reducing in the clearance but, maximum value was observed in C_d = 20 μm. In the clearance group of 20 μm, we expected the hydrodynamic lubrication because the Λ value defined as the ratio between lubricant thickness and average roughness is almost 3.0. Too small clearance induced the severe contact. Thus, our results suggest that the optimal clearance of new MOM is 50 μm to enhance lubrication performance.
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Influence of leg-length discrepancy on anterior acetabular coverage using false profile image(共著) Reviewed
Masaki Kudo, Tomohisa Sekimoto, Takero Sakamoto, Etsuo Chosa.
Journal of Orthopaedic Science 20 ( 5 ) 861 - 867 2015.9
Language：English Publishing type：Research paper (scientific journal)
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Yamako G., Chosa E., Totoribe K., Watanabe S., Sakamoto T.
Medical Engineering and Physics 37 ( 8 ) 820 - 825 2015.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Medical Engineering and Physics
© 2015 IPEM.Shortened cementless femoral stems have become popular with the advent of minimally invasive total hip arthroplasty (THA). Successful THA requires initial stem stability and prevention of stress shielding-mediated bone loss, although the effect of stem shortening is controversial. Here we experimentally examined whether stem shortening affects stress shielding and initial stability. Anatomical stems (length, 120mm) were cut to an 80mm or 50mm length. Ten tri-axial strain gauges measured the cortical strain on each stem-implanted femur to evaluate stress shielding. Two transducers measured axial relative displacement and rotation under single-leg stance loading. The 50mm stem increased the equivalent strains with respect to the original stem in the proximal calcar region (31.0% relative to intact strain), proximal medial region (63.1%), and proximal lateral region (53.9%). In contrast, axial displacement and rotation increased with a decreasing stem length. However, the axial displacement of the 50mm stem was below a critical value of 150μm for bone ingrowth. Our findings indicate that, with regard to a reduction in stem length, there is a tradeoff between stress shielding and initial stability. Shortening the stem up to 50mm can promote proximal load transfer, but bone loss would be inevitable, even with sufficient initial stability for long-term fixation.
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jointly worked Reviewed
37 ( 8 ) 820 - 825 2015.8
Language：English Publishing type：Research paper (scientific journal)
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宮崎県における2014春季キャンプに対するメディカルサポート報告－キャンプの地の総合的メディカルサポート体制の構築にむけて－(共著)
小島岳史, 田島卓也, 帖佐悦男, 石田康行, 河原勝博, 山口奈美, 日吉優, 永井琢哉, 園田典生, 松岡知己, 井上篤, 田島直也, 山本惠太郎, 樋口潤一
九州・山口スポーツ医・科学研究会志 ( 27 ) 4 - 7 2015.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Morphologic changes of anchor holes by using full-thread anchors after the suture bridge technique"jointly worked" Reviewed
Journal of Japanese Orthopaedic Society of Knee,Arthroscopy and Sports Medicine 40 ( 3 ) 587 - 590 2015.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Two siblings with neuropathic scoliosis caused by Chiari malformation type I with syringomyelia(共著) Reviewed
Hiroshi Kuroki, Naoki Inomata, Hideaki Hamanaka, Kiyoshi Higa, Etsuo Chosa, Naoya Tajima.
Journal of Orthopaedic Science 20 ( 3 ) 579 - 583 2015.5
Language：English Publishing type：Research paper (scientific journal)
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Clinical Courses of Osteochondritis Dissecans of the Humeral Capitellum Found by Medical Checkup for Child and Adolescent Baseball Players Reviewed
Japanese Journal of ORTHOPAEDIC SPORTS MEDICINE 35 ( 2 ) 139 - 143 2015.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Pseudoaneurysm as a complication of shoulder arthroscopy Reviewed
Yasuyuki Ishida, Ethuo Chosa, Noboru Taniguchi
Knee Surgery, Sports Traumatology, Arthroscopy 23 ( 5 ) 1549 - 1551 2015.5
Language：English Publishing type：Research paper (scientific journal)
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Pseudoaneurysm as a complication of shoulder arthroscopy.
Ishida Y, Chosa E, Taniguchi N
Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 23 ( 5 ) 1549 - 51 2015.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Treatment Strategy for Cervical Myelopathy in Patients with Athetoid Cerebral Palsy(共著) Reviewed
Hiroshi Kuroki, Shinichiro Kubo, Hideaki Hamanaka, Naoki Inomata, Kiyoshi Higa, Etsuo Chosa.
International Journal of Orthopaedics 2 ( 2 ) 243 - 249 2015.4
Language：English Publishing type：Research paper (scientific journal)
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Efficacy of the Osaka Medical College(OMC) brace in the treatment of adolescent idiopathic scoliosis following Scoliosis Research Society brace studies criteria(共著) Reviewed
Hiroshi Kuroki, Naoki Inomata, Hideaki Hamanaka, Kiyoshi Higa, Etsuo Chosa, Naoya Tajima.
Scoliosis 10 ( 12 ) 2015.4
Language：English Publishing type：Research paper (scientific journal)
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Predictive factors of Osaka Medical College(OMC) brace treatment in patients with adolescent idiopathic scoliosis(共著) Reviewed
Hiroshi Kuroki, Naoki Inomata, Hideaki Hamanaka, Kiyoshi Higa, Etsuo Chosa, Naoya Tajima.
Scoliosis 10 ( 11 ) 2015.4
Language：English Publishing type：Research paper (scientific journal)
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Surgical treatment of femoral trochanteric fractures using the 120°nail -About poor result cases-"jointly worked" Reviewed
Journal of Japanese Society for Fracture Repair 37 ( 3 ) 720 - 724 2015.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Prospective Comparisons of Femoral Tunnel Enlargement With 3 Different Postoperative Immobilization Periods After Double-Bundle Anterior Cruciate Ligament Reconstruction With Hamstring Grafts(共著) Reviewed
Takuya Tajima, Etsuo Chosa, Katsuhiro Kawahara, Nami Yamaguchi.
Arthroscopy 31 ( 4 ) 651 - 658 2015.4
Language：English Publishing type：Research paper (scientific journal)