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Porous-coated, cementless femoral component yields positive results in total hip replacement
Kim Y-H, Kim J-S, Park J-W, Joo J-H. J Bone Joint Surg (Br). 2011; doi: 10.1302/0301-620X.93B5.25994
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A short metaphyseal-fitting, porous-coated cementless femoral component provided satisfactory results when utilized in total hip replacement, according to Korean researchers.
The team reviewed results from 84 total hip replacements (THRs) in patients aged 70 years or older using a short metaphyseal-fitting porous-coated cementless Proxima (DePuy, Leeds, UK) femoral component.
According to the study abstract, the researchers followed 84 patients who underwent THRs and received a Proxima femoral component. All operations were performed using a posterolateral approach, and a “round-the-corner” technique was used for femoral broaching and insertion of the implant.
Patients were reviewed at 3 months, 1 year, and yearly for 4 years to 5 years using radiographs, HHS and WOMAC osteoarthritis index scores. In addition, pain was assessed using an analogue scale and activity was assessed using UCLA score. Pelvic radiographs were taken to determine femoral morphology preoperatively, as well as the postoperative position of the femoral oral component in the anteroposterior and lateral planes. Radiographs were also used in the study to classify component stability as either osseointegrated, fibrous stable, or unstable.
According to the abstract, the authors found no significant difference between normal hips and operated hips in terms of center of rotation and femoral offset. Furthermore, mean HHS, WOMAC score, patient activity and level of thigh pain improved significantly. Improved function was reported by all patients.
“Poor bone quality was not a contraindication, and stable fixation of the femoral component was achievable in osteoporotic bones,” the authors wrote.