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


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.JohnMDaGauravGhoshBSbChitranjan S.RanawatMDcAmar S.RanawatMDcMortezaMeftahMDd

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.