The purpose of this study was to evaluate the in vivo migration patterns of a polished femoral component cemented line-to-line using EBRA –FCA. The series included 164 primary consecutive THAs performed in 155 patients with a mean age of 63.8 years. A single prosthesis was used combining an all-polyethylene socket and a 22.2 mm femoral head. The monoblock double tapered femoral component made of 316-L stainless steel had a highly polished surface (Ra 0.04 micron) and a quadrangular section (Kerboull(r) MKIII, Stryker). The femoral preparation included removal of diaphyseal cancellous bone to obtain primary rotational stability of the stem prior to the line-to-line cementation. Stem subsidence was evaluated using EBRA-FCA software which accuracy is better than ± 1.5 mm (95% percentile), with a specificity of 100% and a sensitivity of 78% for detection of migration of more than 1.0 mm, using RSA as the gold standard.Introduction
Methods
The purpose of this prospective randomized study was to compare the 2-year follow-up penetration of Oxinium versus Metal on polyethylene in a consecutive series of low friction total hip arthroplasty. Between July 2006 and May 2006, 50 patients (27 females and 23 males) with a mean age of 60.6 ± 11.4 years (21 to 75) were randomized to receive either Oxinium (25 hips) or Metal (25 hips) femoral head. Other parameters, including the femoral component and the all polyethylene socket (EtO sterilized), were identical in both groups. The primary criterion for evaluation was linear head penetration measurement using the Martell system.Introduction
Methods
