Investigation of the mechanism of hip joint stability for safe spreading of hip arthroscopic surgery

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K18014
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 56020:Orthopedics-related
• Research Institution: University of Occupational and Environmental Health, Japan
• Principal Investigator: Utsunomiya Hajime 産業医科大学, 医学部, 助教 (60760387)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 股関節鏡 / 股関節不安定性 / 関節包切開 / 腸骨大腿靱帯

Outline of Final Research Achievements

In this study, we investigated the effects of capsulotomy on hip joint instability and the impact of capsular repair on its improvement. We used fresh-frozen cadaveric hip joints and conducted analyses using a 6 degrees of freedom robotic arm. The results revealed that capsulotomy brings about significant changes in hip joint stability. In particular, performing a capsulotomy that completely damages the iliofemoral ligament leads to significant hip joint instability. Regarding capsular repair techniques, while conventional suturing methods showed no significant difference in instability compared to capsulotomy alone, it was evident that certain repair methods significantly improved instability compared to capsulotomy alone.

Free Research Field

股関節鏡

Academic Significance and Societal Importance of the Research Achievements

股関節鏡手術を行う際は、腸骨大腿靭帯を完全に損傷するような関節包切開を行うと、重大な股関節不安定性を引き起こすため、手術の際には避けることが望ましいことが示唆された。関節包切開は3cmまで、腸骨大腿靭帯を温存する形であれば重篤ではなく、この程度の関節包切開で手術を行うことが重要と考えられた。また、股関節包修復術の方法として、従来より行われてきた縫合では不安定性は改善せず、より強固な股関節包修復術である shoelace technique、double shoelace technique、Quebec city slider techniqueを用いるべきであることを証明した。