Reverse total shoulder arthroplasty with proximal bone loss: a biomechanical comparison of partially vs. fully cemented humeral stems.

ABSTRACT:

Background

The appropriate amount of cementation at the time of reverse total shoulder arthroplasty with significant proximal bone loss or resection is unknown. Extensive cementation of a humeral prosthesis makes eventual revision arthroplasty more challenging, increasing the risk of periprosthetic fracture. We analyzed the degree of subsidence and torque tolerance of humeral components undergoing standard cementation technique vs. our reduced polymethyl methacrylate (PMMA) protocol. Reduced cementation may provide sufficient biomechanical stability to resist physiologically relevant loads, while still permitting a clinically attainable torque for debonding the prosthesis.

Methods

A total of 12 cadaveric humeri (6 matched pairs) underwent resection of 5 cm of bone distal to

SUBMITTER: Maturana C 

PROVIDER: S-EPMC11330736 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature