Circumferential Labral Reconstruction With Knotless All-Suture Anchors Restores Hip Distractive Stability: A
Ajay C Lall1, Benjamin L Smith2, Ady H Kahana-Rojkind3
1LALL Orthopedics Research Academy, Paramus, New Jersey, USA.
The American Journal of Sports Medicine
|October 23, 2024
Summary
Circumferential labral reconstruction (CLR) with knotless all-suture anchors (ASAs) effectively restores labral function in femoroacetabular impingement. While CLR significantly improves stability, higher anchor tension did not further enhance peak distractive forces.
Area of Science:
- Orthopedic Surgery
- Biomechanical Engineering
- Hip Preservation
Background:
- Femoroacetabular impingement (FAI) management requires restoring labral function.
- Circumferential labral reconstruction (CLR) shows promise, but biomechanical data on knotless all-suture anchor (ASA) techniques are limited.
Purpose of the Study:
- To biomechanically evaluate the efficacy of knotless ASA pull-through technique for CLR.
- To determine if CLR restores native labral suction seal biomechanics.
- To assess the impact of anchor tension on peak distractive force.
Main Methods:
- Controlled laboratory study using eight fresh-frozen human cadaveric hips.
- Testing in four states: intact labrum, labral excision, moderate-tension CLR, and high-tension CLR.
- Compressive loading to 250 N, followed by distraction at 10 mm/s until suction seal rupture.
Main Results:
- CLR restored 82.0% of the intact labral suction seal stability.
- Peak distractive forces were significantly higher for intact, moderate-tension CLR, and high-tension CLR compared to labral excision.
- Increased anchor tension did not significantly increase peak distractive forces.
Conclusions:
- Knotless ASA CLR provides biomechanical validation for restoring labral function and stability.
- The technique offers potential advantages in minimizing bone loss during FAI surgery.
- Acetabular rim bevel angle may be a critical factor for optimizing suction seal restoration.
