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

Design parameters affecting initial mechanical stability of tapered, splined modular 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.

Cadaveric results of an accelerometer based, extramedullary navigation system for the tibial resection in total knee arthroplasty.

Introduction: In total knee arthroplasty, the accuracy and precision of the tibial resection must be improved. The purpose of this study was to determine the accuracy and time associated with the use of an accelerometer based, extramedullary surgical navigation system for performing the tibial resection.

Materials And Methods: Four orthopedic surgeons performed a tibial resection utilizing the KneeAlign™ system, each on five separate, cadaveric tibiae.

Early outcome of a modular femoral component in revision total hip arthroplasty.

Forty-six hips in 42 patients underwent revision surgery with a modular femoral component (ZMR; Zimmer, Warsaw, Ind). Thirty-nine hips with 2 to 5 years' follow-up were evaluated radiographically and clinically by the Harris hip score and WOMAC pain/stiffness/function scores. The Harris hip score improved from 47.

The accuracy of subacromial corticosteroid injections: a comparison of multiple methods.

Corticosteroids are commonly used in the treatment of the impingement syndrome. Efficacy, as well as accurate placement, have been questioned. The purpose of this prospective, randomized study is to assess the accuracy of subacromial injections and to correlate accuracy with short term clinical outcome at 3 months.

A comparison of the results of total hip and knee arthroplasty performed on a teaching service or a private practice service.

Background: Active participation of residents and fellows in the performance of total hip and total knee arthroplasties may affect the outcomes of these procedures. We evaluated the early clinical results and complications associated with primary total hip and knee arthroplasties at a hospital that had both university teaching and private practice orthopaedic services.

Methods: We performed a retrospective study on a consecutive series of 347 patients who had undergone 230 total hip and 171 total knee procedures performed by one attending surgeon.