Hip Labral Tears: Difference between revisions
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== Definition/Description == | == Definition/Description == | ||
The hip labrum is a structure made of dense connective tissue and fibrocartilage that outlines the<br>acetabular socket. This continuous structure composed of Type 1 collagen attaches to the bony rim of the acetabulum. The labrum is wider and thinner in the anterior region of the acetabulum and thicker in the posterior region. (Groh 2009 and Sahrann 2006) | |||
As for the blood supply, it is thought that the majority of the labrum is avascular with only the<br>outer third being supplied by the obturator, superior gluteal, and inferior gluteal arteries. There is<br>controversy as to whether there is a potential for healing with the limited blood supply. The superior and inferior portions are believed to be innervated and contain free nerve endings and nerve sensory end organs (giving the senses of pain, pressure, and deep sensation). (Groh 2009 and Sahrann 2006) | |||
The labrum functions as a shock absorber, joint lubricator, and pressure distributor. It resists<br>lateral and vertical motion within the acetabulum along with aiding in stability by deepening the joint by 21%. The labrum also increases the surface area of the joint by 28%. This allows for a wider area of force distribution and is accomplished by creating a sealing mechanism to keep the synovial fluid within the articular cartilage. (Groh 2009) | |||
Labral tears can be classified by their location (anterior, posterior, or superior/lateral),<br>morphology (radial flap, radial fibrillated, longitudinal peripheral, and unstable), or etiology. (Groh 2009) It is generally accepted that most labral tears occur in the anterior, anterior-superior, and superior regions of this acetabulum. <br> | |||
== Epidemiology/Etiology == | == Epidemiology/Etiology == | ||
Revision as of 21:19, 16 July 2011
Original Editor - Alisha Lopez
Lead Editors - Chris Slininger, Kristen Tsuei, Jenny Nordin, Thomas F Lawlor, Alisha Lopez
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Definition/Description[edit | edit source]
The hip labrum is a structure made of dense connective tissue and fibrocartilage that outlines the
acetabular socket. This continuous structure composed of Type 1 collagen attaches to the bony rim of the acetabulum. The labrum is wider and thinner in the anterior region of the acetabulum and thicker in the posterior region. (Groh 2009 and Sahrann 2006)
As for the blood supply, it is thought that the majority of the labrum is avascular with only the
outer third being supplied by the obturator, superior gluteal, and inferior gluteal arteries. There is
controversy as to whether there is a potential for healing with the limited blood supply. The superior and inferior portions are believed to be innervated and contain free nerve endings and nerve sensory end organs (giving the senses of pain, pressure, and deep sensation). (Groh 2009 and Sahrann 2006)
The labrum functions as a shock absorber, joint lubricator, and pressure distributor. It resists
lateral and vertical motion within the acetabulum along with aiding in stability by deepening the joint by 21%. The labrum also increases the surface area of the joint by 28%. This allows for a wider area of force distribution and is accomplished by creating a sealing mechanism to keep the synovial fluid within the articular cartilage. (Groh 2009)
Labral tears can be classified by their location (anterior, posterior, or superior/lateral),
morphology (radial flap, radial fibrillated, longitudinal peripheral, and unstable), or etiology. (Groh 2009) It is generally accepted that most labral tears occur in the anterior, anterior-superior, and superior regions of this acetabulum.
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