Title

The Effect of Taper Angle and Spline Geometry on the Initial Stability of Tapered, Splined Modular Titanium Stems

Publication Date

2015

Journal Title

J Arthroplasty

Abstract

Design parameters affecting initial mechanical stability of tapered, splinedmodular titanium stems (TSMTSs) are not well understood. Furthermore, there is considerable variability in contemporary designs. We asked if spline geometry and stem taper angle could be optimized in TSMTS to improve mechanical stability to resist axial subsidence and increase torsional stability. Initial stability was quantified with stems of varied taper angle and spline geometry implanted in a foam model replicating 2 cm diaphyseal engagement. Increased taper angle and a broad spline geometry exhibited significantly greater axial stability (+ 21%-269%) than other design combinations. Neither taper angle nor spline geometry significantly altered initial torsional stability. (C) 2015 Elsevier Inc. All rights reserved.

Volume Number

30

Issue Number

7

Pages

1254-1259

Document Type

Article

EPub Date

2015/03/11

Status

Northwell Research

Facility

Northwell Health

Primary Department

Orthopedic Surgery

PMID

25754255

DOI

10.1016/j.arth.2015.01.054