Dialing the glenosphere eccentricity posteriorly to optimize range of motion in reverse shoulder arthroplasty.

ABSTRACT:

Background

Friction is the primary cause of notching in reverse shoulder arthroplasty during internal, external rotation (IR/ER), and extension (EXT). To address notching, glenosphere eccentricity (ECC) was introduced. The primary objective of this study was to investigate different positions of glenosphere ECC to determine whether there is an optimal position for impingement-free range of motion.

Methods

In this computer model study, 10 female CTs were analyzed and EXT, ER, IR, and adduction simulated (18 models.) A 135° stem with a +10° liner (145°) was combined with a 25-mm standard/or +3-mm lateralized baseplate (BP) and a 36-mm +2-mm eccentric glenosphere in 4 ECC positions (50° posterior; 30° posterior; 30° anterior; 50° anterior) from the reference position 0° neutral

SUBMITTER: Bauer S 

PROVIDER: S-EPMC11784468 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature