Portal Selection for Suture Anchor Placement During Hip Arthroscopic Labral Repair: A Study Based on 3-Dimensional Model Reconstruction.

Background: Arthroscopic suture repair is the main treatment option for hip labral tears; however, anchor insertion and placement from arthroscopic portals is difficult. Purpose: To quantitatively evaluate the safety of various arthroscopic portals for suture anchor placement during hip labral repair. Study Design: Descriptive laboratory study. Methods: The computed tomography scans of 20 patients with normally developed hip joints were used to create 3-dimensional models. The distances from the anchor to the articular cartilage (DAC) and from the acetabular insertion point to the cortical bone (DCB) were measured in the anterolateral portal (AL), posterolateral portal (PL), midanterior portal (MAP), medial MAP, and 3 distal anterolateral accessory portals (DALAs): DALA-proximal, DALA-middle, and DALA-distal. Labral tears were divided into anterior (4, 3, and 2 o'clock), lateral (1, 12, and 11 o'clock), and posterior (10, 9, and 8 o'clock) acetabular zones, and the Kruskal-Wallis and Mann-Whitney Results: The DAC was significantly smaller in the AL at 1 o'clock (0.68 ± 0.32 mm; Conclusion: There were significant differences in the success rate of anchor placement using different portals during hip arthroscopic labral repair. Clinical Relevance: MAP is recommended for labral repair between 4 o'clock and 1 o'clock, DALA-P is recommended between 2 o'clock and 12 o'clock, AL is suitable at 11 o'clock, and PL is suitable between 10 o'clock and 8 o'clock.