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Related Experiment Videos

The glenoid-labral socket. A constrained articular surface.

S M Howell1, B J Galinat

  • 1Department of Orthopaedics, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.

Clinical Orthopaedics and Related Research
|June 1, 1989
PubMed
Summary
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The glenoid labrum significantly deepens the shoulder socket, contributing 50% to its stability. A Bankart lesion can halve the socket depth, impacting shoulder stability.

Area of Science:

  • Orthopedic surgery
  • Anatomy
  • Biomechanics

Background:

  • The glenoid fossa and labrum form the shoulder socket.
  • Understanding their composite depth is crucial for shoulder stability.

Purpose of the Study:

  • To test the hypothesis that the glenoid fossa and labrum create a deep composite socket.
  • To quantify the contribution of the labrum to socket depth.

Main Methods:

  • Anatomic measurements were taken from 25 shoulder specimens.
  • Depth was measured in the superoinferior (SI) and anteroposterior (AP) directions.

Main Results:

  • The combined glenoid and labrum create a socket approximately 9 mm deep (SI) and 5 mm deep (AP).
  • The labrum provides about 50% of the total socket depth.

Related Experiment Videos

  • Anterior labral detachment (Bankart lesion) reduced AP depth from 5.0 mm to 2.4 mm.

    • Conclusions:

    • The glenoid-labral socket possesses significant depth, suggesting a key role in shoulder stability.
    • Labral integrity is vital for maintaining socket depth and potentially shoulder stability.