Porous tantalum acetabular implants show ‘excellent survivorship’ for complex revision THA
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Porous tantalum cementless acetabular components show stable fixation, positive outcomes and “excellent survivorship” at 10- to 15-year follow-up for revision hip arthroplasty, according to data presented at the Virtual EFORT Congress.
“As we are facing more revision THA due to an increased aging population with more bone loss and more complex cases, and as we have many implants available in the market with different outcomes and survivorship, we as surgeons still look for our perfect and ideal acetabular component,” Mazin Ibrahim, from the London Health Sciences Centre in London, Canada, said in his presentation.
“One of these implants is the porous tantalum cementless component, which has been available in the market for nearly two decades,” he said. “However, we do not have many studies available in the literature to report on long-term outcomes.”
Ibrahim and colleagues retrospectively reviewed 102 patients who had received porous tantalum cups during revision THA from 2003 to 2009. Mean age was 80 years. The primary outcome measure was revision of the acetabular component at a minimum of 7 years of follow-up. Secondary outcome measures included radiological assessment and patient-reported outcome measures, such as preoperative and postoperative SF 12 and WOMAC scores.
After adjusting for patients with a minimum 10-year follow-up, Ibrahim and colleagues found implant survivorship was 95.3%. Total WOMAC scores improved from 46.8 preoperatively to 64.4 postoperatively. Likewise, SF 12 scores improved from 29 preoperatively to 32 postoperatively.
Radiographic results showed a well-fixed implant with no loosening or migration. Few complications were reported, with four patients requiring revision, according to Ibrahim.
“Compared with the available literature, we are still the largest cohort available with excellent survivorship of 95.3%,” he said.
While mortality unrelated to surgery and loss to follow-up are potential limitations, Ibrahim said porous tantalum implants provide “excellent clinical and radiological outcomes.”
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Ibrahim M, et al. Paper 1917. Presented at: Virtual EFORT Congress; Oct. 28-30, 2020.
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