Scapula fractures after reverse total shoulder arthroplasty: Classification and treatment

Lynn A Crosby, Adam Hamilton, Todd Twiss

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

Background Reverse total shoulder arthroplasty (RTSA) implants have been developed to treat patients with deficient rotator cuffs. The nature of this procedure's complications and how these complications should be managed continues to evolve. Fractures of the scapula after RTSA have been described, but the incidence and best methods of treatment are unclear. Questions/purposes We therefore (1) determined the incidence and (2) developed a classification system intended to suggest the best choice of treatment. Patients and Methods We reviewed the records of 400 patients treated with RTSA over 4.5 years and identified all patients with scapula fractures. We identified three discrete patterns: avulsion fractures of the anterior acromion (Type I); fractures of the acromion posterior to the acromioclavicular joint (Type II); and fractures of the scapular spine (Type III). Results Twenty-two patients (5.5%) had fractures. Eight (2.0%) had Type I fractures on the first followup radiographs; these patients were treated nonoperatively with resolution of symptoms. Ten (2.5%) had Type II fractures a mean of 10.8 months after RTSA; seven of the 10 were treated surgically with improvement in their clinical symptoms. Four (1%) had Type III fractures at a mean of 10.3 months; all four fractures were treated with surgical fixation with healing. Conclusions Scapula fracture is a relatively common complication of RTSA. Our observations suggest Type I fractures can be observed with a likelihood of symptom relief. For Type II fractures, we recommend acromioclavicular joint resection if stable but open reduction internal fixation if unstable. We believe Type III fractures are best treated with open reduction internal fixation. Level of Evidence Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

Original languageEnglish (US)
Pages (from-to)2544-2549
Number of pages6
JournalClinical Orthopaedics and Related Research
Volume469
Issue number9
DOIs
StatePublished - Jan 1 2011

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Scapula
Arthroplasty
Acromion
Acromioclavicular Joint
Therapeutics
Rotator Cuff
Incidence
Spine
Guidelines

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Scapula fractures after reverse total shoulder arthroplasty : Classification and treatment. / Crosby, Lynn A; Hamilton, Adam; Twiss, Todd.

In: Clinical Orthopaedics and Related Research, Vol. 469, No. 9, 01.01.2011, p. 2544-2549.

Research output: Contribution to journalArticle

Crosby, Lynn A ; Hamilton, Adam ; Twiss, Todd. / Scapula fractures after reverse total shoulder arthroplasty : Classification and treatment. In: Clinical Orthopaedics and Related Research. 2011 ; Vol. 469, No. 9. pp. 2544-2549.
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abstract = "Background Reverse total shoulder arthroplasty (RTSA) implants have been developed to treat patients with deficient rotator cuffs. The nature of this procedure's complications and how these complications should be managed continues to evolve. Fractures of the scapula after RTSA have been described, but the incidence and best methods of treatment are unclear. Questions/purposes We therefore (1) determined the incidence and (2) developed a classification system intended to suggest the best choice of treatment. Patients and Methods We reviewed the records of 400 patients treated with RTSA over 4.5 years and identified all patients with scapula fractures. We identified three discrete patterns: avulsion fractures of the anterior acromion (Type I); fractures of the acromion posterior to the acromioclavicular joint (Type II); and fractures of the scapular spine (Type III). Results Twenty-two patients (5.5{\%}) had fractures. Eight (2.0{\%}) had Type I fractures on the first followup radiographs; these patients were treated nonoperatively with resolution of symptoms. Ten (2.5{\%}) had Type II fractures a mean of 10.8 months after RTSA; seven of the 10 were treated surgically with improvement in their clinical symptoms. Four (1{\%}) had Type III fractures at a mean of 10.3 months; all four fractures were treated with surgical fixation with healing. Conclusions Scapula fracture is a relatively common complication of RTSA. Our observations suggest Type I fractures can be observed with a likelihood of symptom relief. For Type II fractures, we recommend acromioclavicular joint resection if stable but open reduction internal fixation if unstable. We believe Type III fractures are best treated with open reduction internal fixation. Level of Evidence Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.",
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