Effect of glenoid cartilage defects on contact pressure

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20738
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0802:Biomedical structure and function and related fields
• Research Institution: Tohoku University
• Principal Investigator: Kawakami Jun 東北大学, 大学病院, 助教 (60910164)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 肩関節脱臼 / 関節窩軟骨欠損 / 変形性肩関節症

Outline of Final Research Achievements

CT imaging of 10 fresh-frozen　shoulders and 10 fresh-frozen crab-eating macaques shoulders were performed. From the DICOM data, a 3D printer was used to create 3D fixation blocks using 3D bone surface models of the humerus and scapula as molds. An Instron was used as the device to apply contact pressure between the glenoid fossa and the humeral head. On the scapula side, a slide table was created that could be rotated in 30-degree increments and moved freely back and forth, left and right. On the humerus side, a jig was created to allow free flexion and rotation angles. A three-dimensional block was created to create the articular cartilage defect. An experimental apparatus was completed to clarify the articular cartilage defect, contact pressure, and contact area.

Free Research Field

整形外科

Academic Significance and Societal Importance of the Research Achievements

いままで、関節窩骨軟骨欠損に対する調査は多く行われてきたが、軟骨欠損に対する調査は少ない。近年画像解析の進歩に伴い、軟骨欠損に対する注目は高まってきている。関節窩軟骨欠損と関節面の接触面積、接触圧の調査を行うことで、長期経過で変形性関節症を起こすような軟骨欠損を判定できるようになる。