ARTHROSCOPIC LABRAL REPAIR TO THE GLENOID RIM

The purpose of this study was to develop a new arthroscopic approach f or traumatic instability that effectively reattaches avulsed capsulola bral tissue to the glenoid articular rim with sutures. This technique does not depend on fixation devices, trans-scapular drilling, or impla ntation of suture anchors. We attached a three-dimensional position se nsor and force and torque transducer to the humerus and scapula of eig ht normal cadaveric shoulders to measure the normal, surgically unstab le (arthroscopic Bankart lesion), and repaired preparations. We assess ed eight motion ranges and six laxity tests. Capsulolabral release inc reased all passive ranges and allowed significant translational increa ses on posterior drawer and crank testing. After repair, motion was ne ver decreased and there were no differences in laxity relative to norm al. Neurovascular structures were never at risk. Our arthroscopic repa ir provides anatomic reattachment and effective deepening of the gleno id concavity similar to that achieved by open repair. This new method restores joint stability, preserves motion, and can withstand forceful loads. Ongoing clinical trials will substantiate whether the techniqu e is as safe and reliable as shown cadaverically.