Proximal Humerus Tumors: Higher-than-Expected Risk of Revision With Constrained Reverse Shoulder Arthroplasty.

CONCLUSIONS: Our findings are concerning because the revision risk with this constrained reverse total shoulder implant was higher than has been reported by others for other proximal humerus prostheses. The highly constrained design that helps prevent instability might also transmit increased stresses to the humeral component-bone interface, therefore making it susceptible to loosening. We believe that any other implant with a similar degree of constraint will have the same problem, and changing the indications for patient selection may not solve this issue. These theories need to be tested biomechanically, but our desire is to warn surgeons that while trying to prevent instability, one might trade one complication (instability) for another: aseptic loosening. LEVEL OF EVIDENCE: Level IV, therapeutic study. PMID: 32281773 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/32281773?dopt=Abstract

Source: Clinical Orthopaedics and Related Research - April 9, 2020 Category: Orthopaedics Authors: Ayvaz M, Cetik RM, Bakircioglu S, Tokgozoglu AM Tags: Clin Orthop Relat Res Source Type: research