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Scientific Articles   |    
Prosthesis of Antibiotic-Loaded Acrylic Cement (PROSTALAC) Use for the Treatment of Infection After Shoulder Arthroplasty
Andrew Jawa, MD; Lewis Shi, MD; Travis O'Brien, MS; Jessica Wells, MS; Laurence Higgins, MD; John Macy, MD; Jon J.P. Warner, MD
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Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. One or more of the authors, or his or her institution, has had a financial relationship, in the thirty-six months prior to submission of this work, with an entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. No author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

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Department of Orthopaedic Surgery, Boston University Medical Center, 850 Harrison Avenue, Dowling Building, 2 North, Boston, MA 02118. E-mail address: Andrew.Jawa@bmc.org
Department of Orthopaedic Surgery, Yawkey Center, Massachusetts General Hospital, 55 Fruit Street, Suite 3G, Boston, MA 02115
Department of Orthopaedic Surgery, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115
Department of Orthopaedic Surgery, University of Vermont Medical Center, 11 Colchester Avenue, Burlington, VT 05401
Investigation performed at Massachusetts General Hospital, Boston, Brigham and Women's Hospital, Boston, Massachusetts, and the University of Vermont Medical Center, Burlington, Vermont

Copyright © 2011 by The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2011 Nov 02;93(21):2001-2009. doi: 10.2106/JBJS.J.00833
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Abstract

Background: 

There are limited data on Prosthesis of Antibiotic-Loaded Acrylic Cement (PROSTALAC) use for the treatment of infection following shoulder arthroplasty. We performed a retrospective review of our experience with the PROSTALAC in terms of infection eradication, complications, and outcomes.

Methods: 

Twenty-eight patients with an infection at the site of a shoulder arthroplasty who were managed with the PROSTALAC were followed until eradication of the infection and maximum functional improvement. The average duration of follow-up was 27.6 months (range, twelve to sixty-nine months). In twenty-five of the twenty-eight patients, the PROSTALAC was created with antibiotic-impregnated cement, a standard humeral head mold, and a scaffold with either a one-third tubular plate or a 3.5-mm reconstruction plate. Three PROSTALAC implants had no scaffold.

Results: 

Although all patients benefited from the use of the PROSTALAC, there were nine complications in eight patients (29%), with six additional unplanned surgical procedures being performed in this group. One patient had a dislocation, three had a fracture of the PROSTALAC, and five had recurrent infections requiring debridement and revision PROSTALAC placement. All fractures were associated with use of the semitubular plate. Twelve patients (43%), including two with revision PROSTALAC implants, were satisfied with pain relief and function and declined a second-stage procedure. With the exclusion of two patients who had a revision PROSTALAC implant, sixteen patients (57%) had a second-stage procedure; the procedures included ten reverse shoulder arthroplasties, three hemiarthroplasties, two total shoulder arthroplasties, and one resection arthroplasty. At the time of the latest follow-up, the average forward elevation of the shoulder was 77° (range, 30° to 130°). Fifteen patients had no or mild pain, eight patients had moderate pain, and five had severe pain. Patients with reverse total shoulder arthroplasties did not have improved function compared with the other cohorts.

Conclusions: 

The use of the PROSTALAC for the treatment of infection following shoulder arthroplasty is beneficial. Infection was initially eradicated in twenty-three (82%) of twenty-eight patients, more than half of our patients had mild or no pain, and 43% of patients declined a second-stage procedure because of acceptable function and pain relief. Conversely, five of twenty-eight patients had severe pain and five patients had persistent infection requiring additional surgery. The use of the reverse total shoulder arthroplasty did not appear to improve outcomes.

Level of Evidence: 

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

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    References

    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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