Faculty Profiles - OZAKI Toshifumi

Papers - OZAKI Toshifumi

Division display 1,521 - 1,540 of about 1,746 ／ All the affair displays >>

Toolpath generator for multi-axis medical machine tool to optimize cutting tool posture and position before skin incision Reviewed

Nawata W, Sugita N, Nakajima Y, Kato T, Fujiwara K, Abe N, Ozaki T, Suzuki M, Mitsuishi M

Proceedings of the 6th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2011 2011

Toolpath strategy based on geometric model for multi-axis medical machine tool Reviewed

Sugita N, Nakano T, Abe N, Fujiwara K, Ozaki T, Suzuki M, Mitsuishi M

CIRP Annals - Manufacturing Technology 60 ( 1 ) 419 - 424 2011

Regulation of mechanical stress-induced MMP-13 and ADAMTS-5 expression by RUNX-2 transcriptional factor in SW1353 chondrocyte-like cells. Reviewed

Tetsunaga T, Nishida K, Furumatsu T, Naruse K, Hirohata S, Yoshida A, Saito T, Ozaki T

Osteoarthritis Cartilage 19 ( 2 ) 222 - 232 2011

Comparison between loose fragment chondrocytes and condyle fibrochondrocytes in cellular proliferation and redifferentiation. Reviewed

Takata N, Furumatsu T, Abe N, Naruse K, Ozaki T

J Orthop Sci 16 ( 5 ) 589 - 597 2011

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Loose fragments in spontaneous osteonecrosis of the knee (SONK) are usually removed by surgical treatment. However, the healing potential of osteonecrotic loose fragments and their clinical availability, for example as a cell source for cartilage repair and tissue engineering, have not been investigated. The objective of this study was to evaluate the cellular proliferation and redifferentiation ability of loose fragment chondrocytes for the treatment of SONK. METHODS: Cells were obtained from the remaining cartilage of chondral loose fragments or fibrocartilaginous tissue under the affected femoral condyle in SONK. The proliferation activity of loose fragment-derived chondrocytes and condyle-derived fibrochondrocytes was evaluated. In-vitro differentiation ability was assessed by PCR and histological analysis. RESULTS: The deposition of proteoglycans and type II collagen were maintained in loose fragments. However, loose fragment-derived chondrocytes had lower proliferating activity than condyle-derived fibrochondrocytes. Chondrogenic redifferentiation ability was lower in loose fragment chondrocytes than in condyle fibrochondrocytes. Differentiation towards adipogenic and osteogenic lineages was not observed in loose fragment chondrocytes. On the other hand, lipid vacuoles were detected in fibrochondrocytes after adipogenic treatment. CONCLUSIONS: This study demonstrated that loose fragment-derived chondrocytes in SONK had lower potential than fibrochondrocytes in cellular proliferation and redifferentiation. Our experimental results suggest that osteonecrotic loose fragments might have restricted cellular properties in the healing of SONK-related osteochondral defects.

DOI： 10.1007/s00776-011-0128-1

PubMed

researchmap

Treatment of Torn Lateral Discoid Meniscus:— Comparison of Meniscal Repair Group and Subtotal Meniscectomy Group —

Takata Naoki, Furumatsu Takayuki, Miyazawa Shinichi, Yokoyama Yusuke, Okada Yukimasa, Ozaki Toshifumi, Abe Nobuhiro

The Journal of the Chugoku-Shikoku Orthopaedic Association 23 ( 2 ) 261 - 265 2011

Language：Japanese Publisher：The Chugoku-Shikoku Orthopaedic Association

Arthroscopic treatment has been widely performed for tears of the lateral discoid meniscus. However, this frequently results in total meniscectomy in cases of degenerative peripheral tear. We performed meniscal suturing of residual peripheral tears after subtotal meniscectomy to preserve the function of the meniscus. Methods : We treated 15 knees of 15 patients (4 males and 11 females) with symptomatic lateral discoid meniscus tears. The mean age of the patients at surgery was 18.7 years (range, 7 to 37 years), and the mean follow-up period was 2.7 years (range, 12 to 65 months). We retrospectively compared the clinical results and the incidence rate of osteochondritis dissecans (OCD) in the peripheral repair group with those in the subtotal meniscectoy group. Clinical results were assessed on the basis of the Japanese Orthopaedic Association (JOA) score. Results : Eight patients underwent arthroscopic partial meniscectomy alone. In the remaining 7 patients with degenerative peripheral tears, meniscal repair was performed after subtotal meniscectomy to avoid total meniscectomy. All of the patients had excellent JOA scores at the final follow-up point. None of them required additional surgery for re-tear. The incidence of OCD was 14% in the partial meniscectomy group, whereas OCD was not found in the peripheral repair group. Conclusion : Our results demonstrate the short-term efficacy of arthroscopic partial meniscectomy in conjunction with peripheral repair in cases of degenerative peripheral tear of lateral discoid meniscus.

DOI： 10.11360/jcsoa.23.261

CiNii Article

researchmap

Corrective osteotomy for severe kyophosis in ankylosing spondylitis: One case report

MAZAKI Tetsuro

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 6 ) 1231 - 1232 2011

The long term results over 25 years follow-up of Charnley total hip arthroplasty

TETSUNAGA Tomonori

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 5 ) 1017 - 1018 2011

A case report of atypical femoral shaft farcture: the medullary cavity was obstructed at the fracture site

OSAKI Shuhei

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 5 ) 951 - 952 2011

Total hip arthroplasty with femoral shortening osteotomy for a patient treated by Schanz osteotomy

INOUE Madoka

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 5 ) 1009 - 1010 2011

Well leg compartment syndrome following radical cystectomy: A case report

OKADA Yoshiki

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 4 ) 869 - 870 2011

Radiological outcome after medial patellofemoral ligament reconstruction using Endobutton fixation

YOKOYAMA Yusuke

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 4 ) 731 - 732 2011

The functional outcome after subtotal scaplectomy for chondrosarcoma: two case reports

OKADA Yoshiki

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 1 ) 41 - 42 2011

Deep venous thrombosis and pulmonary embolism after pelvic and acetabular fracture

MAZAKI Tetsuro

The Central Japan Journal of Orthopaedic Surgery & Traumatology 54 ( 3 ) 469 - 470 2011

Comparison between Fondaparinux and Enoxaparin in Early Administration after Total Knee Arthroplasty

Okada Yukimasa, Furumatsu Takayuki, Itani Satoru, Saiga Kenta, Takata Naoki, Yokoyama Yusuke, Ozaki Toshifumi, Abe Nobuhiro

The Journal of the Chugoku-Shikoku Orthopaedic Association 23 ( 2 ) 399 - 403 2011

Language：Japanese Publisher：The Chugoku-Shikoku Orthopaedic Association

Background: The validity of fondaparinux and enoxaparin has been reported in the prevention of deep vein thronbosis and pulmonary embolism (DVT/PE) after total knee arthroplasty (TKA). We compared the effectiveness of early administration of these two drugs after TKA. Methods: We studied 32 patients who underwent TKA in the period between May 2009 and May 2010. The operations were performed under general anesthesia and femoral nerve block, using an air tourniquet, and using cements for implant fixation. The patients were divided in two groups, use of 2.5mg fondaparinux once daily (Fa group), and use of 2000IU of enoxaparin twice daily (Ex group). The initial dose was administered between 12 and 21 hours after surgery and continued for 14 days. We compared the incidence of DVT/PE, bleeding complications, D dimer level, and hemoglobin (Hb) loss. Results: DVT/PE occurred in 6 patients (38%) in the Fa group, and 3 (19%) in the Ex group. Bleeding complications occurred in none of the Fa group and 4 (25%) in the Ex group. There were no significant differences in D dimer level and Hb loss. Conclusion: Our results indicate that enoxaparin decreases the incidence of DVT/PE compared with fondaparinux, but increases the bleeding complications.

DOI： 10.11360/jcsoa.23.399

CiNii Article

researchmap

Minimally invasive plate osteosynthesis for osteofibrous dysplasia of the tibia: a case report. Reviewed International journal

Nakahara H, Kunisada T, Noda T, Ozaki T

Journal of orthopaedic surgery (Hong Kong) 18 ( 3 ) 374 - 377 2010.12

Language：English Publishing type：Research paper (scientific journal)

Osteofibrous dysplasia occurs most frequently in the tibia and may result in deformity and pathological fracture. We report one such case in a 6-year-old girl who underwent minimally invasive plate osteosynthesis using a locking compression plate. The varus deformity of the tibia was manually corrected, and the plate was inserted without extensive surgical exposure. At 20-week follow-up, the fracture had healed completely, and she had returned to normal daily living. At 3-year follow-up, radiographs showed no progression of the varus deformity. Minimally invasive plate osteosynthesis is useful for treatment of pathological fractures caused by osteofibrous dysplasia. It preserves blood flow at the fracture site, leading to good bone healing and stability to prevent further deformity and an early return to daily activity.

DOI： 10.1177/230949901001800325

PubMed

researchmap

Centpillar stemで著明なゆるみを生じた1例

長谷井嬢, 遠藤裕介, 鉄永智紀, 藤原一夫, 三谷茂, 尾崎敏文

日本人工関節学会誌 40 724 - 725 2010.12