Letter to the editor: Labral calcification plays a key role in hip pain and symptoms in femoroacetabular impingement

[...]FAI involved the abutment of the femoral head against the acetabulum in a hip flexed-adducted-internally rotated position, impinging the anterior–superior portion of the labrum, and resulting in varied and limited labrum lesion [3]. [...]the authors concluded that a higher local concentration of calcium crystal deposition in the labrum could lead to a higher pain level and worse functional sore. Previous study stated that the amount of calcification in the labrum instead of histological degeneration grade had a significant influence on the preoperative Harris Hip Score (HHS) in patients with end-stage OA [2, 4]. [...]how much amount of calcium crystal deposition in the labrum produce adverse effect on hip function in patients with FAI need further study.