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Related Experiment Video

Updated: Sep 25, 2025

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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Bone Volumes and Trajectory Angles for Acetabular Anchor Placement Can Be Optimized.

Rai Di Loreto1, Alan Getgood2, Ryan Degen2

  • 1School of Kinesiology, Western University, London, Ontario, Canada.

Arthroscopy, Sports Medicine, and Rehabilitation
|May 2, 2022
PubMed
Summary

Optimal anchor placement for hip arthroscopy labral tear repair is crucial. The 1 o'clock position offers the greatest bone volume and trajectory angle for safe anchor insertion, minimizing overlap.

Keywords:
bone volumecomputational modelsuture anchortrajectory

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Hip Arthroscopy

Background:

  • Acetabular labral tears are common injuries affecting hip function.
  • Hip arthroscopy is a standard surgical procedure for labral repair.
  • Optimal anchor placement is critical for successful repair and minimizing complications.

Purpose of the Study:

  • To determine the optimal anchor placement and trajectory for acetabular labral tear repair during hip arthroscopy.
  • Focus on the 12 to 3 o'clock positions on the acetabular rim.

Main Methods:

  • Generated 3D computational models from 13 cadaveric pelvis specimens.
  • Virtually embedded anchors at 12, 1, 2, and 3 o'clock positions.
  • Calculated bone volume, trajectory angle, and inter-anchor overlap.

Main Results:

  • The 1 o'clock position had significantly greater bone volume (4196.2 mm³).
  • The 1 o'clock position exhibited the largest trajectory angle (32.04°).
  • The 2-3 o'clock positions showed the least adjacent anchor overlap (0.12 mm³).

Conclusions:

  • The 1 o'clock position provides the greatest bone thickness and trajectory angle for safe anchor insertion.
  • Anchor placement at 12-1 o'clock positions offers favorable biomechanical properties.
  • Careful portal selection is recommended for anterior anchor insertion.