Performance of Non-Cemented, Hemispherical, Rim-Fit, Hydroxyapatite Coated Acetabular Component

Abstract

The purpose of this study was to assess the durability of a non-cemented, hemispherical rim-fit, hydroxyapatite coated cup with a highly cross-linked polyethylene in 223 total hip arthroplasties. At 6-years follow-up (range, 5–9), there were no cup revisions for osteolysis or loosening. Radiologic evidence of osseointegration was based on presence of Stress Induced Reactive Cancellous Bone and radial trabeculae, seen in 47% and 93% of cups, respectively; both were most prevalent in Zone 1. There was no interference demarcation in any zones. Two cups were revised (0.9%): one for dislocation and another for infection. The Kaplan–Meier survivorship for cup revision for any failure (infection, dislocation) was 99% and for mechanical failure (osteolysis, loosening) was 100%. This design has excellent safety, efficacy and durability.

The Journal of Arthroplasty

Volume 30, Issue 12, December 2015, Pages 2233-2236

Thomas K.JohnMD^aGauravGhoshBS^bChitranjan S.RanawatMD^cAmar S.RanawatMD^cMortezaMeftahMD^d

^aActive Orthopedics and Sports Medicine, Hackensack University Medical Center, Hackensack, New Jersey

^bWeill Cornell Medical College, Hospital for Special Surgery, New York, New York

^cHospital for Special Surgery, New York, New York

^dNYU Langone Medical Center, Hospital for Joint Disease, New York, New York

Revised 31 May 2015, Accepted 16 June 2015, Available online 23 June 2015.