Cementless cup device for hip replacements very durable

February 11th, 2009 - 4:32 pm ICT by IANS  

Washington, Feb 11 (IANS) The first cementless metal cup design implant used in hip replacement by Rush University Medical Centre (RUMC) remains extremely durable even 20 years after repeat or “revision” hip replacement. The Harris-Galante-1 acetabular metal shell, which is designed to allow a patient’s bone to grow into the implant, remained fixed in place in 95 percent of hip revision cases at a minimum follow-up of 20 years.

The implant and its bone in-growth surface were originally developed with Jorge Galante, RUMC orthopaedic surgeon and one of the investigators. The cup’s porous surface allows bone and tissue to grow into the device to keep the hip implant in place.

Earlier generation implants relied on the use of bone cement to secure the implant to the patient’s pelvis and were associated with a higher rate of failure, particularly when used in patients who had previously had a hip implant that had failed, said an RUMC release.

“The study’s results indicate that even the first generation of this device has excellent clinical results and durability,” said Craig Della Valle, orthopaedic surgeon at Rush and study investigator. “Even after 20 years, there is low rate of failure in terms of fixation.”

Researchers previously reported the results of the Harris-Galante-1 shell for total hip revision procedures in 138 hips at a minimum of three, seven, and 15 years postoperatively. The current report presents the long-term outcomes of this group at a follow-up of 20 years.

These results were published in the February issue of the Journal of Bone and Joint Surgery.

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