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Updated: Aug 10, 2026
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Loosening performance of cemented glenoid prosthesis design pairs
C Anglin1, U P Wyss, R W Nyffeler
1Sulzer Orthopedics Ltd., P.O. Box 65, 8404, Winterthur, Switzerland. carolynanderic@telus.net
Objective:
The purpose of this pilot study (n=3) was to compare the loosening performance of glenoid prosthesis design pairs where only one design variable differed.
Design:
Glenoids were subjected to dynamic edge loading in a biaxial test setup.
Background:
Glenoid component loosening is the primary concern in total shoulder arthroplasty.
Methods:
After the humeral head was cycled 100,000 times to the superior and inferior edges of the glenoid, the tensile edge displacements were measured under superior and inferior off-center loading.
Results And Conclusions:
Based on this study, a rough-backed design had dramatically better loosening performance than a smooth-backed; curved-backed was superior to flat-backed; a less-constrained articular surface was better than a more-constrained articular surface; pegs outperformed a keel; threaded pegs were marginally preferable to cylindrical pegs; and an all-polyethylene design rocked slightly less than a metal-mesh-backed design.
Relevance:
A comparison of the laboratory loosening behavior of glenoid prostheses may lead to improved designs, subsequently leading to a reduction in the incidence of clinical loosening.
