Morphological Study on the Acetabular Labrum

Won, Ye Yeon; Chung, In Hyuk; Chung, Nam-Su; Song, Kyung Hun

doi:10.3349/ymj.2003.44.5.855

Cited by 27 publications

(18 citation statements)

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“…The boundary between the cartilage and labrum was not visible in CT image data, so the initial boundary was defined where the concave acetabulum transitioned into the convex acetabular rim (Figure 2). A previous investigation demonstrated that the extent of the labrum on the medial side of the acetabular rim is variable (Won et al, 2003). Therefore, a second boundary was placed approximately 2 mm medial to the baseline boundary to assess the effects of the labrum extending medial to the acetabular rim (Figure 2).…”

Section: Methodsmentioning

confidence: 99%

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Role of the acetabular labrum in load support across the hip joint

Henak

Ellis

Harris

et al. 2011

Journal of Biomechanics

182

166

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The relatively high incidence of labral tears among patients presenting with hip pain suggests that the acetabular labrum is often subjected to injurious loading in vivo. However, it is unclear whether the labrum participates in load transfer across the joint during activities of daily living. This study examined the role of the acetabular labrum in load transfer for hips with normal acetabular geometry and acetabular dysplasia using subject-specific finite element analysis. Models were generated from volumetric CT data and analyzed with and without the labrum during activities of daily living. The labrum in the dysplastic model supported 4-11% of the total load transferred across the joint, while the labrum in the normal model supported only 1-2% of the total load. Despite the increased load transferred to the acetabular cartilage in simulations without the labrum, there were minimal differences in cartilage contact stresses. This was because the load supported by the cartilage correlated to the cartilage contact area. A higher percentage of load was transferred to the labrum in the dysplastic model because the femoral head achieved equilibrium near the lateral edge of the acetabulum. The results of this study suggest that the labrum plays a larger role in load transfer and joint stability in hips with acetabular dysplasia than in hips with normal acetabular geometry.

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Section: Methodsmentioning

confidence: 99%

“…The labrum is primarily composed of circumferential Type I collagen fibers (Petersen et al, 2003). The extent of the labrum medial to the acetabular rim varies by subject and location in the acetabulum (Seldes et al, 2001; Won et al, 2003). …”

Section: Introductionmentioning

confidence: 99%

Role of the acetabular labrum in load support across the hip joint

Henak

Ellis

Harris

et al. 2011

Journal of Biomechanics

182

166

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“…At the time of second-look arthroscopy, one of us (HS) determined the presence or absence of labral regrowth, reconstituted labral height [28], quality of labral regrowth, and presence of any labral scarring [14] or inflammation. One previous report [20] has shown moderate to substantial intraobserver reliability for the reporting of labral pathology during hip arthroscopy.…”

Section: Methodsmentioning

confidence: 99%

Spontaneous Hip Labrum Regrowth After Initial Surgical Débridement

Abrams

Safran

Sadri

2013

Clinical Orthopaedics &Amp; Related Research

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Background Anecdotal evidence from second-look hip arthroscopies and animal studies has suggested spontaneous labral regrowth may occur after débridement. However, these observations have not been systematically confirmed. Questions/purposes We (1) determined whether labral regrowth occurs after débridement in human hips; (2) if so, described the characteristics of the reconstituted labrum; and (3) determined the association, if any, of age with the presence and quality of labral regrowth. Methods We retrospectively reviewed all 24 patients who previously had open hip surgical dislocation with labral débridement for treatment of femoroacetabular impingement (FAI) and concomitant hip arthroscopy 2 years after index procedure in association with planned removal of trochanteric hardware between January and December 1999. Data recorded included amount of labral resection at the index procedure using the clockface method, presence and quality of any labral regrowth, presence of any labral scarring or inflammation, and WOMAC 1 scores. Minimum clinical followup was 11 years (average, 12 years; range, 11-12 years). Results All patients demonstrated labral regrowth at arthroscopy at 2 years. Homogeneous regrowth of labral height was seen in 21 of 24 patients, with labral scarring noted in four of 24. Average WOMAC 1 score was 98 points (range, 90-100 points) at the time of hardware removal. Increasing patient age was independently associated with decreased WOMAC

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“…The femoral head cartilage was assumed to be 2 mm at its thickest point, gradually reducing to zero toward the lateral edge (Eckstein, et al 1997). The labrum was defined based on morphological studies, such that it covered the femoral head cartilage in the unloaded condition with a triangular cross-section and a height of 7 mm from the acetabular rim to the tip (Won, et al 2003). In order to create a wide range of hip geometries, a consecutive series of α and CE angles were chosen for evaluation, covering normal and pathological joint morphologies.…”

Section: Hip Modelsmentioning

confidence: 99%