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Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_4 | Pages 17 - 17
1 Jan 2016
Skrepnik N Slagis S
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INTRODUCTION

Metallic ion release may be related to bearing surface wear and thus serve as an indicator of in-vivo performance of metal on metal (MOM) articulations.

OBJECTIVES

Compare large head MOM hip components with modular MOM and metal on polyethylene (MOP) to determine their relative effects on serum metal ion levels.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_11 | Pages 149 - 149
1 Jul 2014
Slagis S Skrepnik N Wild J Robertson M Nielsen B Skrepnik T Eberle R
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Summary

Management of metal on metal hip replacements can be accomplished with a simple algorithm including easily available metal ion levels and hip MRI with metal artifact reducing software. After revision serum metal ion levels can be expected to fall rapidly.

Introduction

Metallic ion release may be related to bearing surface wear and thus serves as an indicator of the in-vivo performance of metal on metal articulations. The purpose of this prospective, controlled study was to compare new large head metal on metal hip components with established modular metal on metal and metal on polyethylene and to determine their effects on serum metal levels before and after revision.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_15 | Pages 41 - 41
1 Mar 2013
Cohen R Skrepnik N Katz J Maltry J Housman LR Slagis S Eberle R
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The purpose of this study was to compare the clinical, radiographic, and DEXA results of Epoch® Femoral Component for primary THA with other non-cemented femoral components. The Epoch and Epoch 14+ (Zimmer, Warsaw, IN) Composite Femoral Components were studied in conjunction with the VerSys® Fiber Metal Taper, Fiber Metal Mid coat and Beaded Fullcoat Femoral Components (Zimmer, Warsaw, IN). All patients were randomized into one of five component groups and followed prospectively. All patients across the five groups were matched with respect to demographics and body mass index (BMI) (Table 1). Diagnoses were evenly distributed across all study groups. There was no significant change in BMD at 5-years when compared to the baseline (6 month) DEXA measurements for all component groups except for the Beaded Fullcoat component subset which had significant decreases in BMD in proximal zones 1, 6 and 7, The Fiber Metal Taper showed similar decreases in BMD in zones 1 and 7, and the Epoch Component had a significant decrease in BMD in zone 7 only. Additionally, our DEXA findings complement and support the subjective radiographic interpretations performed for this study cohort. The results from this prospective, randomized controlled clinical trial showed that the Epoch Composite Femoral Component for primary THA can achieve results equal to standard alloy components of varying design. Based on these early results, the Epoch and Epoch 14+ Femoral Components for primary THA are justified for continuance of further prospective study.