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Archives of Orthopaedic and Trauma Surgery

, Volume 139, Issue 2, pp 181–187 | Cite as

Glenoid and rotator interval dimension in patients older than 40 years after traumatic anterior shoulder dislocation

  • Darius M ThiesenEmail author
  • Marielle Ernst
  • Jennifer Meyer
  • Alexander S Spiro
  • Jin Yamamura
  • Till O Klatte
Trauma Surgery
  • 46 Downloads

Abstract

Introduction

The number of patients above 40 years suffering an anterior shoulder dislocation for the first time has recently increased. This study investigated the role of glenoid version, inclination and rotator interval dimension in patients older than 40 years with an anterior shoulder dislocation. We hypothesize that the rotator interval plays a more important role than the osseus alignment in older patients.

Materials and methods

Patients aged older than 40 years with a traumatic shoulder dislocation were compared with patients who had undergone magnetic resonance imaging (MRI) for a different reason. The MRIs of 61 dislocation group patients were compared with MRIs of 73 comparison group patients. Two shoulder surgeons measured glenoid version, inclination, height and width, rotator interval (RI) height, base (width) and area. The study and comparison group consisted of 61 patients with a mean age of 59 ± 9 years and 73 patients with a mean age of 57 ± 12, respectively.

Results

The mean glenoid version of the dislocation group was − 4.9° ± 4.4° (retroversion) and mean inclination was 9.8° ± 8° (reclination). Mean rotator interval base, height and the rotator interval area was 46 ± 6 mm, 14 ± 5 mm and 33 ± 14 mm2, respectively. The comparison group had a mean glenoid version of − 5.4° ± 5.4° and a mean inclination of 10.8° ± 6.2°. The rotator interval base was 41 ± 6 mm, the height was 16 ± 4 mm and the area was 34 ± 11 mm2. The between-group differences were statistically significant for rotator interval height and base (p < 0.0001). A significant difference was revealed for the height–width ratio of the glenoid (p = 0.0001).

Conclusions

In patients older than 40 years who have suffered anterior shoulder dislocation, the shape of the glenoid rather than its spatial position is of significance. A wide and high rotator interval promotes anterior shoulder dislocation in these patients.

Keyword

Anterior shoulder dislocation Rotator interval Glenoid dimension Patients older than 40 years MRI measurement Shoulder anatomy 

Notes

Funding

There is no funding source.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Human and animal rights

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Darius M Thiesen
    • 1
    Email author
  • Marielle Ernst
    • 1
  • Jennifer Meyer
    • 1
  • Alexander S Spiro
    • 2
  • Jin Yamamura
    • 1
  • Till O Klatte
    • 1
  1. 1.Department of Trauma, Hand, and Reconstructive SurgeryUniversity Medical Centre Hamburg-EppendorfHamburgGermany
  2. 2.Department of Paediatric Orthopaedics, Children’s Hospital AltonaUniversity Medical Centre HamburgHamburgGermany

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