The contribution of the acetabular labrum to hip joint stability: a quantitative analysis using a dynamic three-dimensional robot model

Journal of Biomechanical Engineering
T F BonnerW K Barsoum

Abstract

The acetabular labrum provides mechanical stability to the hip joint in extreme positions where the femoral head is disposed to subluxation. We aimed to quantify the isolated labrum's stabilizing value. Five human cadaveric hips were mounted to a robotic manipulator, and subluxation potential tests were run with and without labrum. Three-dimensional (3D) kinematic data were quantified using the stability index (Colbrunn et al., 2013, "Impingement and Stability of Total Hip Arthroplasty Versus Femoral Head Resurfacing Using a Cadaveric Robotics Model," J. Orthop. Res., 31(7), pp. 1108-1115). Global and regional stability indices were significantly greater with labrum intact than after total labrectomy for both anterior and posterior provocative positions. In extreme positions, the labrum imparts significant overall mechanical resistance to hip subluxation. Regional stability contributions vary with joint orientation.

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Citations

Nov 12, 2016·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Marcin E DomzalskiWielislaw Papierz
Jan 22, 2020·Journal of Biomechanical Engineering·Rohit BadidaJoseph J Crisco
Nov 27, 2018·Biomechanics and Modeling in Mechanobiology·Yoonjin KimYongnam Song
Jul 15, 2021·Arthroscopy Techniques·Harsh SinghJorge Chahla

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