Revision of Anatomic Total Shoulder Arthroplasty to Hemiarthroplasty: Does it work?

Background: The projected increase in revision shoulder arthroplasty has increased interest in the outcomes of theseprocedures. Glenoid component removal and conversion to a hemiarthroplasty (HA) is an option for aseptic glenoidloosening after anatomic total shoulder arthroplasty (aTSA).Methods: We identified patients who had undergone revision shoulder arthroplasty over a 15-year period. 17 patientsmet inclusion and exclusion criteria, and a retrospective chart review was conducted for pre-surgical and operativedata. We contacted patients at a mean follow-up of 70 months from revision surgery for implant survival, reoperationsand functional outcomes scores.Results: Implant survival was estimated to be 88% at 2 years and 67% at 5 years. Mean ASES score for survivingimplants was 58 ± 22. Mean SANE score was 54 ± 24, and mean VAS pain score was 3.5 ± 2.8. Mean SF-12 Mentaland Physical scores were 46 ± 15 and 38 ± 10, respectively. Five patients (50% of those with surviving implants)reported being either very satisfied or satisfied with the status of their shoulder. There were complications in 6 patients(35%) and 5 patients (29%) required reoperation.Conclusion: HA following failed aTSA due to glenoid loosening produced modest clinical results and satisfaction rates.Reverse arthroplasty may be a more reliable treatment strategy in this patient population.Level of evidence: IV