A Modified Wagner Stem Design Increases the Primary Stability in Cementless Revision Hip Arthroplasty.

ABSTRACT:

Background

Primary stability is of great importance for the longevity of the implant in cementless revision total hip arthroplasty, since instability is a major cause of rerevision. The purpose of this study was to evaluate the effect of an additional set of less prominent, wider splines added to an established conical stem design with sharp splines on axial stability in a model with significant proximal bone defects.

Methods

Twenty fresh-frozen human femurs were implanted with either the established or the additional spline design, dynamically loaded and tested in a load-to-failure configuration. Cortical contact in the femoral canal after implantation was evaluated by superimposing computed tomography scans and 3-dimensional laser scans. Stem subsidence and micromotion wer

SUBMITTER: Boettcher JM 

PROVIDER: S-EPMC11847092 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature