Recent studies seem to confirm that the proximal to middle part of the articular capsule, including the zona orbicularis, acts biomechanically as a locking ring wrapped around the femoral neck and thus is a key structure for hip stability in distraction.
New research indicates that the proximal to middle section of the articular capsule, encompassing the zona orbicularis, operates biomechanically like a locking ring surrounding the femoral neck and plays an essential role in maintaining hip stability during the process of distraction.