The Role of the Acetabular Labrum and the Transverse Acetabular Ligament in Load Transmission in the Hip*

Konrath, Gregory A.; Hamel, Andrew J.; Olson, Steve A.; Bay, Brian K.; Sharkey, Neil A.

doi:10.2106/00004623-199812000-00008

Cited by 157 publications

(105 citation statements)

References 33 publications

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“…The strategy of modeling the normal human hip without the acetabular labrum is based on the results of several studies that suggest limited loading on the labrum in the normal hip [30,85,86], and the approach is consistent with previous FE analyses of the normal hip by our group and others [25,32,34]. Further, the minimal effect on the patterns of cartilage E 1 and s max in our evaluation of a normal hip with and without the acetabular labrum provides confidence that the acetabular labrum would not alter the effects of the cartilage constitutive model on FE predicted E 1 and s max .…”

Section: Discussionmentioning

confidence: 99%

Finite Element Prediction of Transchondral Stress and Strain in the Human Hip

Henak

Ateshian

Weiss

2014

Journal of Biomechanical Engineering

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Cartilage fissures, surface fibrillation, and delamination represent early signs of hip osteoarthritis (OA). This damage may be caused by elevated first principal (most tensile) strain and maximum shear stress. The objectives of this study were to use a population of validated finite element (FE) models of normal human hips to evaluate the required mesh for converged predictions of cartilage tensile strain and shear stress, to assess the sensitivity to cartilage constitutive assumptions, and to determine the patterns of transchondral stress and strain that occur during activities of daily living. Five specimen-specific FE models were evaluated using three constitutive models for articular cartilage: quasilinear neo-Hookean, nonlinear Veronda Westmann, and tension-compression nonlinear ellipsoidal fiber distribution (EFD). Transchondral predictions of maximum shear stress and first principal strain were determined. Mesh convergence analysis demonstrated that five trilinear elements were adequate through the depth of the cartilage for precise predictions. The EFD model had the stiffest response with increasing strains, predicting the largest peak stresses and smallest peak strains. Conversely, the neo-Hookean model predicted the smallest peak stresses and largest peak strains. Models with neo-Hookean cartilage predicted smaller transchondral gradients of maximum shear stress than those with Veronda Westmann and EFD models. For FE models with EFD cartilage, the anterolateral region of the acetabulum had larger peak maximum shear stress and first principal strain than all other anatomical regions, consistent with observations of cartilage damage in disease. Results demonstrate that tension-compression nonlinearity of a continuous fiber distribution exhibiting strain induced anisotropy incorporates important features that have large effects on predictions of transchondral stress and strain. This population of normal hips provides baseline data for future comparisons to pathomorphologic hips. This approach can be used to evaluate these and other mechanical variables in the human hip and their potential role in the pathogenesis of osteoarthritis (OA).

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Section: Discussionmentioning

confidence: 99%

Finite Element Prediction of Transchondral Stress and Strain in the Human Hip

Henak

Ateshian

Weiss

2014

Journal of Biomechanical Engineering

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“…[15][16][17][18] Numerous studies have shown the direct association between acetabular labrum lesions and chondral lesions of the femoral head and acetabulum. [19][20][21][22][23][24] Currently, there is growing interest in non-arthroplasty surgical treatment of chondropathies of the acetabulum and the femoral head because they are a frequent cause of pain and functional limitation. Usually, the treatment of hip cartilage lesions is based exclusively on arthroscopic debridement or microfractures, [25][26][27][28][29][30] and new different treatments have been proposed only recently, such as arthroscopic repair of acetabular chondral delamination with fibrin adhesive.…”

mentioning

confidence: 99%

Arthroscopic Treatment of Hip Chondral Defects: Autologous Chondrocyte Transplantation Versus Simple Debridement—A Pilot Study

Fontana¹,

Bistolfi

Crova

et al. 2012

Arthroscopy: The Journal of Arthroscopic & Related Surgery

145

127

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“…The free nerve endings of the acetabular labrum, found in the anterior, superior, posterior, and inferior quarter zones of all sections, 5 may participate in nociceptive and proprioceptive mechanisms. 7 In the MFIR test, as the degree of internal rotation increases to the fully flexed hip joint, the femoral neck impinges against the posterosuperior portion of the acetabular labrum (Fig. 3).…”

Section: Discussionmentioning

confidence: 99%