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Related Concept Videos

Muscles of the Shoulder01:23

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The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
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Reverse Total Shoulder Arthroplasty
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Reverse shoulder arthroplasty with os acromiale.

Woo-Jin Shin1, Hyun-Ju Lee1, Ki-Yong An1

  • 1Department of Orthopedic Surgery, Gwangju Veterans Hospital, Gwangju, Korea.

Clinics in Shoulder and Elbow
|December 17, 2020
PubMed
Summary

Reverse shoulder arthroplasty (RSA) can successfully treat cuff tear arthropathy in patients with os acromiale. This study shows improved pain, range of motion, and satisfaction after RSA in these rare cases.

Keywords:
Cuff tear arthropathyOs acromialeReverse shoulder arthroplasty

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Area of Science:

  • Orthopedic Surgery
  • Musculoskeletal Research

Background:

  • Deltoid muscle function is crucial for reverse shoulder arthroplasty (RSA) outcomes.
  • Os acromiale, a rare condition in Asian populations (0.7% in Koreans), presents anatomical variations affecting the deltoid origin.
  • RSA in patients with os acromiale is infrequently reported, posing unique surgical considerations.

Observation:

  • A case series of two patients with combined cuff tear arthropathy and os acromiale who underwent RSA.
  • The subscapularis-sparing deltopectoral approach was utilized for the RSA procedure.
  • Pre- and post-operative evaluations included range of motion (ROM), visual analog scale (VAS) for pain, and patient satisfaction.

Findings:

  • Both patients experienced a decrease in VAS pain scores and an increase in ROM post-surgery.
  • Postoperative patient satisfaction significantly improved in both cases.
  • No specific complications directly attributable to os acromiale were observed during the RSA procedures.

Implications:

  • RSA appears to be a viable treatment option for patients with concomitant cuff tear arthropathy and os acromiale.
  • Careful surgical technique is essential to manage the anatomical challenges presented by os acromiale for optimal outcomes.
  • Further research is warranted to establish best practices for RSA in the presence of os acromiale.