Faculty Profiles - OZAKI Toshifumi

MISC - OZAKI Toshifumi

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Posterior cervical spine arthrodesis with laminar screws: A report of two cases

Kazuo Nakanishi, Masato Tanaka, Yoshihisa Sugimoto, Toshifumi Ozaki

ACTA MEDICA OKAYAMA 61 ( 2 ) 115 - 119 2007.4

Language：English Publisher：OKAYAMA UNIV MED SCHOOL

We performed fixation using laminar screws in 2 patients in whom lateral mass screws, pedicle screws or transarticular screws could not be inserted. One was a 56-year-old woman who had anterior atlantoaxial subluxation (AAS). When a guide wire was inserted using an imaging guide, the hole bled massively. We thought the re-insertion of a guide wire or screw would thus increase the risk of vascular injury, so we used laminar screws. The other case was an 18-year-old man who had a hangman fracture. Preoperative magnetic resonance angiography showed occlusion of the left vertebral artery. A laminar screw was inserted into the patent side (i.e., the right side of C2). Cervical pedicle screws are the most biomechanically stable screws. However, their use carries a high risk of neurovascular complications during screw insertion, because the cervical pedicle is small and is adjacent laterally to the vertebral artery, medially to the spinal cord, and vertically to the nerve roots. Lateral mass screws are also reported to involve a risk of neurovascular injuries. The laminar screw method was thus thought to be useful, since arterial injuries could thus be avoided and it could also be used as a salvage modality for the previous misinsertion.

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Surgical treatment for Blount's disease with bone bridge

18 136 - 136 2007.3

患肢温存を行った高齢者のMFHの1例

中田英二, 時岡孝光, 黒住健人, 原田浩史, 杉原進介, 尾崎敏文

中部日本整形外科災害外科学会雑誌 50 ( 春季学会 ) 195 - 195 2007.3

16.特発性側弯症の重心動揺(第18回日本リハビリテーション医学会中国・四国地方会)

迫間巧将, 田中雅人, 千田益生, 堅山佳美, 尾崎敏文

リハビリテーション医学 : 日本リハビリテーション医学会誌 44 ( 2 ) 121 - 121 2007.2

Clinical outcome of patients with Ewing sarcoma family of tumors of bone in Japan - The Japanese musculoskeletal Oncology Group cooperative study

Hideto Obata, Takafumi Ueda, Akira Kawai, Takeshi Ishii, Toshifumi Ozaki, Satoshi Abe, Kazuhiro Tanaka, Hiroyuki Tsuchiya, Akihiko Matsumine, Hiroo Yabe

CANCER 109 ( 4 ) 767 - 775 2007.2

Language：English Publisher：JOHN WILEY & SONS INC

BACKGROUND. Ewing sarcoma family of tumors (ESFT) of bone is extremely rare in Japan. The objectives of the Current study were to assess the clinical outcome and prognostic factors of patients with ESFT of bone in Japan and to compare them between Euro-American and Japanese populations.
METHODS. The authors conducted a retrospective analysis of 243 patients who were treated for ESFT of bone in Japan between 1981 and 2003. Local therapy was surgery in 35% of patients, surgery combined with radiotherapy in 40% of patients, radiotherapy alone in 22%, of patients, and no local treatment in 3% of patients. All but 3 patients received various regimens of multidrug chemotherapy.
RESULTS. The median patient age was 16 years. The primary disease sites were the trunk in 53% of patients and the extremities in 47% of patients. Forty-one patients had metastases at presentation. The median follow-up was 66 months. A univariate survival analysis demonstrated that patients who had metastases at presentation, primary site in the trunk, age >= 16 years, tumor size >= 10 cm, tumor that responded poorly to induction chemotherapy, and local treatment with radiotherapy alone had a significantly worse event-free survival (EFS). A multivariate analysis further verified that the former 3 factors were significant adverse prognostic factors. Of 201 patients with localized disease, 45 patients who received current chemotherapy regimens that included ifosfamide and etoposide had a significantly better 5-year EFS rate (67.6%) compared with other patients.
CONCLUSIONS. The clinical outcome of patients with localized ESFT of bone in Japan has improved markedly with the use of current chemotherapy regimens that include ifosfamide and etoposide and has become comparable to the Outcomes observed in other major series of Euro-American patients. The prognostic factors are also almost identical.

DOI： 10.1002/cncr.22481

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LCP-distal femur による大腿骨遠位部骨折の治療経験

那須義久, 尾﨑敏文, 野田知之, 古松毅之, 島村安則, 林正典

骨折 29 ( 4 ) 798 - 802 2007

Treatments for proximal tibial fractures using locking compression plates

FURUMATSU Takayuki

The Central Japan Journal of Orthopaedic Surgery & Traumatology 50 ( 5 ) 875 - 876 2007

高齢者大腿骨遠位部骨折に対する最小侵襲プレート骨接合術

野田知之, 島村安則, 尾﨑敏文

別冊整形外科 52 236 - 241 2007

骨・軟部腫瘍

森本裕樹, 尾﨑敏文

整形外科 58 ( 11 ) 1532 - 1539 2007

MIPO technique with the locking compression plate for femoral lengthening in Klippel-Trenaunay-Weber syndrome

ENDO Hirosuke, ASAUMI Koji, MITANI Shigeru, KURODA Takayuki, KIKUCHI Takeshi, OZAKI Toshifumi

18 27 - 30 2007

下腿開放骨折後骨髄炎に対して Papineau 法に vacuum-assisted closure therapy を併用した治療経験

大森貴夫, 那須義久, 北村亜以, 野田知之, 尾﨑敏文

骨折 29 ( 4 ) 836 - 838 2007

転移性脊椎腫瘍（胸・腰・仙椎）の手術療法

杉原進介, 田中雅人, 尾﨑敏文, 中原進之介

関節外科 26 ( 4 ) 73 - 80 2007

日米における人工関節全置換術の違い ―岡山大学と Anderson Orthopaeic Research Institute 症例の比較検討―

浅海浩二, Engh CA, Egawa H, 遠藤裕介, 三谷茂, 尾﨑敏文

日本人工関節学会誌 37 14 - 15 2007

各論 ―主要疾患の病期・病態別治療法―

国定俊之, 尾﨑敏文

Medical Practice 24 ( 臨時増刊号 ) 193 - 199 2007

Development of a medical CAD/CAM system for orthopedic surgery

M. Mitsuishi, N. Sugita, K. Fujiwara, N. Abe, T. Ozaki, M. Suzuki, H. Moriya, T. Inoue, K. Kuramoto, Y. Nakashima, K. Tanimoto

CIRP ANNALS-MANUFACTURING TECHNOLOGY 56 ( 1 ) 405 - 410 2007

Language：English Publisher：TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD

In successful knee arthroplasty, the femur and the tibia must be shaped to fit an artificial joint. The recent trend towards MIS (Minimally Invasive Surgery) to decrease the length of the required incision in the skin has increased surgical difficulty, since the open access area is small. The developed system consists of (1) a preplanning system providing a CAD function, (2) a multi-axis CAM system which avoids cutting the skin and the ligament, and keeps the cutting time within acceptable limits, and (3) a 7-axis machine tool that assures the safety of the patient and the surgeon, and enables MIS.

DOI： 10.1016/j.cirp.2007.05.094

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頚椎後方固定に対する laminar screw の応用 ―頚椎椎弓板径の測定―

中西一夫, 田中雅人, 杉本佳久, 尾﨑敏文

整形外科 58 ( 3 ) 322 - 326 2007

紹介状および返事の書き方

尾﨑敏文

関節外科 26 ( 4月増刊号 ) 161 - 163 2007

Cutting tool system to minimize soft tissue damage for robot-assisted minimally invasive orthopedic surgery

Naohiko Sugita, Yoshikazu Nakajima, Mamoru Mitsuishi, Shosaku Kawata, Kazuo Fujiwara, Nobuhiro Abe, Toshifumi Ozaki, Masahiko Suzuki

MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION - MICCAI 2007, PT 1, PROCEEDINGS 4791 994 - + 2007

Language：English Publisher：SPRINGER-VERLAG BERLIN

Minimally invasive surgery in orthopedic field is considered to be a challenging problem with a milling robot. One objective of this study is to minimize collision of the cutting tool with soft tissue. The authors have developed a robot with redundant axis to avoid the collision so far. Sorne important components are modeled based on physical requirements, and a geometric optimization approach based on the model has been also proposed to improve performance. In this paper, a protective mechanism to cover the non-working part of the cutting edge is proposed to avoid soft tissue damage. Hardware and software have been developed for this application and the effectiveness of this technique was evaluated with urethane bone.

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Short-term Outcome after MIS-TLIF (Transforaminal Lumbar Interbody Fusion) for Degenerative Spondylolisthesis of Lumbar Spine

Misawa Haruo, Tanaka Masato, Nakanishi Kazuo, Sugimoto Yoshihisa, Ozaki Takafumi

The Journal of the Chugoku-Shikoku Orthopaedic Association 19 ( 1 ) 21 - 26 2007

Language：Japanese Publisher：The Chugoku-Shikoku Orthopaedic Association

Posterior lumbar interbody fusion (PLIF) is considered to be a suitable operative procedure for degenerative spondylolisthesis. However, PLIF is known as a procedure with many side effects; among them these related to the extensive invasion of paravertebral muscles (PVM) are the most remarkable. In order to overcome this problem with the aim being the prompt recovery of patients, we have recently conducted the MIS-TLIF (minimally invasive surgery-transforaminal lumbar interbody fusion), which is associated with less PVM insult. The procedure enables patients to rise, walk, leave the hospital, and return to their job promptly. MIS-TLIF is the combination of PLIF procedure using a percutaneous pedicle screw and rod system, CD Horizon Sextant, a bilateral decompression and a transforaminal interbody fusion by hemi mini-open approach using microendoscope or microscope. We reported comparative short-term outcomes after MIS-TLIF and conventional PLIF. MIS-TLIF technique was associated with longer surgical procedure. However, bed rest length and admission were shorter when compared with the conventional PLIF procedure. Concerning efficiencies of JOA score about low back pain differences were absent. There was a reduction in the low back pain on day 3 after MIS-TLIF procedure comparing to the preoperative period when evaluated through the VAS score. The MIS-TLIF is a less invasive procedure, which is associated with a reduction of the low back pain in the postoperative period that contributes to shorten the length of bed rest and admission. MIS-TLIF technique is a less insulting procedure for the treatment of degenerative spondylolisthesis.

DOI： 10.11360/jcsoa.19.21

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Total Hip Arthroplasty after Failed Transtrochanteric Rotational Osteotomy of the Femoral Head

Kuroda Takayuki, Mitani Shigeru, Endo Hirosuke, Tetsunaga Tomonori, Ozaki Toshihumi, Asaumi Koji

The Journal of the Chugoku-Shikoku Orthopaedic Association 19 ( 1 ) 15 - 19 2007

Language：Japanese Publisher：The Chugoku-Shikoku Orthopaedic Association

The purpose of this study was to examine clinical outcomes and operative pitfalls of six cases of total hip arthroplasty (THA) surgery after failed transtrochanteric rotational osteotomy (TRO) for avascular necrosis of the femoral head. Five were men and two were women. The average age of the patients at the time of conversion to THA was 40 years (range, 21-60 years). Postoperative Japanese Orthopaedic Association (JOA) scores showed very satisfactory improvement compared to preoperative scores (mean score 40.7/78.5 points, respectively). Compared to the primary THA procedure, the mean operation time of THA after the failed TRO was significantly longer and the average of blood loss was also significantly greater. Postoperative complications were observed in only one hip. The broach should be inserted carefully to avoid retroversion. It is important to completely remove the impingement of the osteophyte. Because in THA after TRO many pitfalls are existing, these points should be taken into preoperative and postoperative consideration.

DOI： 10.11360/jcsoa.19.15

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