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
DOI
10.1016/j.arth.2015.01.054