The Elbow Ulnar Collateral Ligament Complex Demonstrates Region Specific Stretching and Recovery Characteristics with Valgus Loading.

After repeated valgus loading and subsequent resting, the UCL complex demonstrated permanent stretching with some recovery but not to intact levels. The anterior band demonstrated increased strain in the distal segment compared to the proximal segment with valgus loading. The anterior band was able to recover to strain levels similar to intact after resting, while the posterior band did not.