A T-capsulotomy provides increased hip joint visualization compared with an extended interportal capsulotomy

Area of Science:

• Orthopedic Surgery
• Hip Arthroscopy
• Surgical Anatomy

Background:

• Femoroacetabular impingement (FAI) is a common hip condition requiring surgical intervention.
• Hip arthroscopy often involves capsulotomy to improve joint visualization.
• Different capsulotomy techniques, such as interportal and T-capsulotomies, offer varying degrees of visualization.

Purpose of the Study:

• To compare the cross-sectional area (CSA) of joint visualization between extended interportal capsulotomies and T-capsulotomies in a cadaveric hip model.

Main Methods:

• Twenty fresh-frozen cadaveric hips were dissected.
• Sequential interportal capsulotomies of varying lengths (2-8 cm) were performed.
• Sequential T-capsulotomies (Half-T and Full-T) were created.
• High-resolution digital photographs were taken after each capsulotomy to measure visualized intra-articular CSA.
• Independent t-tests were used for statistical comparison.

Main Results:

• Interportal capsulotomies showed a significant increase in CSA visualization up to 6 cm.
• T-capsulotomy (Half-T and Full-T) significantly increased CSA visualization compared to interportal techniques.
• Full-T capsulotomy provided significantly superior CSA visualization compared to 6 cm and 8 cm interportal capsulotomies.
• Half-T capsulotomy visualization was comparable to 6 cm and 8 cm interportal capsulotomies.

Conclusions:

• T-capsulotomy provides significantly greater joint visualization than extended interportal capsulotomies.
• This enhanced visualization may aid in addressing residual FAI.
• Surgeons must balance the benefits of increased visualization with the risk of iatrogenic instability from incomplete capsular repair.