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The posterior ridge of the greater tuberosity of the humerus: a suitable landmark for the posterior approach to the shoulder joint?

  • Grob, Karl Department of Orthopaedic Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland
  • Monahan, Rebecca Helen Launceston General Hospital, Launceston, TAS, Australia
  • Manestar, Mirjana Department of Anatomy, University of Zürich-Irchel, Zürich, Switzerland
  • Filgueira, Luis Department of Anatomy, University of Fribourg, Fribourg, Switzerland
  • Zdravkovic, Vilijam Department of Orthopaedic Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland
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    01.04.2018
Published in:
  • Journal of Shoulder and Elbow Surgery. - 2018, vol. 27, no. 4, p. 635–640
English The purpose of this study was to evaluate the posterior ridge of the greater tuberosity, a palpable prominence during surgery, as a landmark for the posterior approach to the glenohumeral joint.Methods: Twenty-five human cadaveric shoulders were dissected. In 5 cases, a full-thickness rotator cuff tear was present. The posterior surgical anatomy was defined, and the distance from the ridge to the interval between the infraspinatus (IS) and teres minor (TM) muscle, the distance from the ridge to the inferior border of the glenoid (IBG), and the distance between the IS-TM interval and the IBG were determined.Results: In all specimens, a prominent ridge on the posterior greater tuberosity lateral to the articular margin could be identified. The IS-TM interval was located, on average, 3 mm proximal to this ridge. The IS-TM interval corresponded to a point 5 mm proximal to the IBG. In all shoulders, the ridge was located, on average, 8 mm proximal to the IBG. The plane of the IS-TM interval showed a vertically oblique direction.Conclusion: The posterior ridge of the greater tuberosity is a suitable landmark to locate the internervous plane between the IS and TM and should not be crossed distally. Unlike other landmarks, the ridge moves with the humeral head, making it is less dependent on the patient's size, sex, and arm position and the quality of the rotator cuff. The ridge is always located proximal to the insertion of the TM and IBG.
Faculty
Faculté des sciences et de médecine
Department
Département de Médecine
Language
  • English
Classification
Medicine
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/306498
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