Paper #26 - ISHA Annual Scientific Meeting 2016

Circumferential Acetabular Labral Reconstruction Provides Equivalent Improvement to Labral Repair Despite Greater Initial Severity of Damage at Two-Year Follow-Up

Andrew B. Wolff, MD, Washington, DC UNITED STATES
Geoffrey W. Hogan, BA, Washington, DC UNITED STATES
Catherine Salfiti, BS, Washington, DC UNITED STATES
John Scanaliato, BS, Washington, DC UNITED STATES
Alexandra Napoli, BA, Washington, DC UNITED STATES

Washington Orthopedics and Sports Medicine, Washington, DC, UNITED STATES

FDA Status Not Applicable

Summary: Circumferential arthroscopic labral reconstruction is a viable option for patients with missing or severely compromised labral tissue with comparable results to those with less challenging hip problems.

Abstract:
Title: Circumferential Acetabular Labral Reconstruction Provides Equivalent Improvement to Labral Repair Despite Greater Initial Severity of Damage and Unfavorable Patient Characteristics at Two-Year Follow-up Introduction: In settings where the labral tissue is damaged beyond repair by either previous surgery or as a sequela of the patient’s underlying hip pathology, a labral reconstruction that biomechanical and limited clinical studies have shown to be a viable alternative to an extensive debridement leaving a segmental defect or a suboptimal repair. A circumferential labral reconstruction (CLR) with ITB allograft between the transverse acetabular ligament antero-inferiorly to the 7-8 o’clock position postero-inferiorly eliminates any high stress junction points, tissue damaged beyond repair and restores stability. Materials & Methods: We retrospectively examined 34 consecutive patients undergoing arthroscopic surgery of the hip with circumferential labral reconstruction with a fascia lata allograft and compared them with 49 consecutive patients undergoing labral repair during the same 5 month period. Pre- and post-op surveys included Visual Analog Pain Score (VAS), International Hip Outcome Tool (IHOT-12), modified Harris Hip Score (mHHS), 12-item Short Form Health Survey (SF-12) and Hip Outcome Score (HOS-ADL and HOS-SSS). Pre-op Tonnis grade was recorded. Severity of labral damage was evaluated in separate sidearm study of 20 patient videos not involved in current study to assess intra-observer reliability for grading of severity of labral damage. Results: The mean age of the reconstruction patients was 43.0 vs. 29.1 for the repair patients (p<0.001). The repair group had 45% mild and 55% moderate tears; the reconstruction group had 80% severe tears or segmental defects and 20% moderate tears. 3.9% of the repair group were revision procedures, while 35% of the reconstruction group were revision procedures. Pre-op Tonnis grade in the Reconstruction group was 0.44 vs. 0.11 (P<0.001). Follow-up rate was 82% with a minimum follow-up of 23 months (range: 23-28 months). In the reconstruction group, 5 patients failed; 1 for core muscle repair procedure, 2 went on to subsequent hip arthroplasty, 2 in need of hip arthroplasty. All 4 conversions to arthroplasty had pre-op tonnis grade of 2. 3 procedures failed in the repair group with one subsequent core muscle repair and 2 revisions to labral reconstruction. In the reconstruction group, the mean Pain VAS score decreased from 4.78 preoperatively to 1.9 postoperatively (P<0.001), IHOT-12 scores increased from 32.38 to 68.9 (P<0.001), and mHHS increased from 48.67 to 74.63 (P<0.001). The SF-12 survey exhibited an increase from 36.29 to 43.15 (P=0.028), HOS-ADL scores increased from 56.28 to 87.47 (P<0.001), and HOS-SSS scores increased from 32.40 to 68.55 (P=0.0028). These improvements were not statistically different from those observed in the repair group (Pain VAS: P=0.361; HOS-ADL: P=0.314; HOS-SSS: P=0.288; mHHS: P=0.996; IHOT: P=0.192; SF: P=0.642). Intra-observer reliability of sidearm video study Kappa = 0.66 indicating moderately good reliability in the grading of severity of labral damage. Discussion & Conclusion: The current study shows that patients undergoing circumferential labral reconstruction with ITB allograft exhibit favorable outcome at 2 years postoperatively with respect to pain and activities of daily living—comparable to the results achieved in patients undergoing repairs of labra with lower severity of damage in a more challenging patient population (14 yrs older with far worse labral damage, a higher Tonnis grade, and far higher percentage of revisions). These data suggest that circumferential arthroscopic labral reconstruction is a viable option for patients with missing or severely compromised labral tissue.