Abstract
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 < 0.05.
Results
The average failure torque was 86.2 ± 18.9 N·m and 81.5 ± 8.9 N·m (P = 0.57) 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 = 0.65).
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.
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Article Info
Publication History
Accepted:
May 31,
2022
Received in revised form:
April 23,
2022
Received:
January 23,
2022
Publication stage
In Press Journal Pre-ProofFootnotes
This study was performed in accordance with the ethical standards in the 1964 Declaration of Helsinki. This study was carried out in accordance with relevant regulations of the US Health Insurance Portability and Accountability Act (HIPAA). Institutional review board approval was not required for this laboratory investigation utilizing de-identified cadaveric specimens.
Author Contributions:
David R. Maldonado, MD. – Study design, specimens preparation, biomechanical testing, data collection and analysis and writing of the manuscript.
Michael B. Banffy, MD. – Study design, data analysis and revision of the manuscript.
Dave Huang, BS. – Study design, biomechanical testing, data collection.
Trevor J. Nelson, BS. – Study design, biomechanical testing, data collection.
Shrey Kanjiya, MD. – Specimens preparation, biomechanical testing, and revision of the manuscript.
Dheeraj Yalamanchili, MD. – Specimens preparation, biomechanical testing, and revision of the manuscript.
Melodie F. Metzger, PhD. – Study design, data interpretation, and writing and revision of the manuscript.
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.
Identification
Copyright
© 2022 Published by Elsevier on behalf of the Arthroscopy Association of North America
