Comparable Torque to Failure Using the Simple Stich Versus the Figure of Eight Configuration for Hip Capsular Closure Following An Interportal Capsulotomy. A Cadaveric Study



      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.


      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.


      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).


      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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