Author(s)

Tatsuya Sueyoshi, E. Michael Keating, Merrill A. Ritter, John B. Meding, Matthew J. Brunsman

Center for Hip and Knee Surgery, Joint Replacement Surgeons of Indiana Research Foundation (JRSI), Mooresville, IN, USA.

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.

Total Hip Arthroplasty (THA), 3-D Porous, Regenerex, Ringloc+, Clinical Outcome, Complication

Sueyoshi, T. , Keating, E. , Ritter, M. , Meding, J. and Brunsman, M. (2016) Early Clinical Outcomes with a 3-D Porous Titanium Acetabular Cup. Open Journal of Orthopedics, 6, 121-125. doi: 10.4236/ojo.2016.66018.