TITLE:
Early Clinical Outcomes with a 3-D Porous Titanium Acetabular Cup
AUTHORS:
Tatsuya Sueyoshi, E. Michael Keating, Merrill A. Ritter, John B. Meding, Matthew J. Brunsman
KEYWORDS:
Total Hip Arthroplasty (THA), 3-D Porous, Regenerex, Ringloc+, Clinical Outcome, Complication
JOURNAL NAME:
Open Journal of Orthopedics,
Vol.6 No.6,
May
31,
2016
ABSTRACT: Cementless acetabular components are associated with a significant incidence of polyethylene wear and secondary osteolysis. 3-dimentional (3-D) porous coating and enhanced shell to a liner fixation are expected to reduce the polyethylene wear and to increase the longevity of an acetabular cup. The authors report the early clinical outcome with a cementless acetabular cup, Regenerex Ringloc+ (Zimmer Biomet, Warsaw, IN) for total hip arthroplasty. Between 2007 and 2013, the registry with 476 hip joints was reviewed retrospectively. There were 210 (48.4%) female and 224 (51.6%) male patients. The average age of the patients at the surgery was 63.9 (± 12.0) years and the average follow-up period was 2.6 years [0.5, 6.5]. At the final follow-up, there was no loosening or cup failure. There were 2 infections, 1 dislocation and 1 liner fracture, resulting in revision hip surgery. Average Harris hip score improved from 53.9 preoperatively to 91.4 postoperatively. The survivorship of Regenerex Ring Loc+ cup and the low complication rate is comparable with previous studies using other 3-D porous metal prostheses. Although this short-term outcome from the institute is very encouraging, a longer follow-up study is required.