Purpose
To measure and compare the torque to failure and stiffness of the capsular repair
construct consisting of four-suture simple stitches to a two-figure of eight stitches
repair construct in external rotation following an interportal capsulotomy.
Methods
Six pairs of fresh-frozen cadaveric hemipelves were divided into two capsular repair
groups. All hips underwent a 40-mm interportal capsulotomy from the 12 o’clock position
to the 3 o’clock position. Capsular closure was performed using either the two stitches
in a figure of eight or with four simple stitches. Afterward, each hemipelvis was
securely fixed to the frame of a mechanical testing system with the hip in 10° of
extension and externally rotated to failure. Significance was set at P < .05.
Results
The average failure torque was 86.2 ± 18.9 N·m and 81.5 ± 8.9 N·m (P = .57) for the two stitches in a figure of eight and the four simple stitches, respectively.
Failure stiffness was also not statistically different between groups and both capsular
closure techniques failed at similar degrees of rotation (P = .65).
Conclusion
Hip capsular repair using either the four simple stitch or two-figure of eight configurations
following interportal capsulotomy demonstrated comparable failure torques and similar
stiffness in a cadaveric model.
Clinical Relevance
Adequate and comprehensive capsular management in hip arthroscopy is critical. Capsular
repair following capsulotomy in femoroacetabular impingement surgery has been associated
with higher patient-reported outcomes when compared to capsulotomy without repair.
Therefore, determining which capsular closure construct provides the higher failure
torque is important.
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Article info
Publication history
Published online: June 21, 2022
Accepted:
May 31,
2022
Received:
January 23,
2022
Footnotes
See commentary on page 3149
The authors report the following potential conflicts of interest or sources of funding: M.B.B. reports consulting and speaker fees from Stryker, Smith & Nephew, and Vericel, outside the submitted work. Full ICMJE author disclosure forms are available for this article online, as supplementary material.
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© 2022 by the Arthroscopy Association of North America