Similar durability, function found in mobile-, fixed-bearing TKAs

ORLANDO, Fla. — All-polyethylene fixed-bearing, modular metal-backed fixed-bearing and mobile-bearing total knee arthroplasties showed similar durability, range of motion and function at 10-year follow-up, according to a study presented at the American Academy of Orthopaedic Surgeons Annual Meeting, here.

“We found at 10 years all three groups in this study were reliable, reproducible and durable in alleviating pain and improving function,” Matthew P. Abdel, MD, said.

Abdel and colleagues reviewed durability as shown by survivorship, range of motion and function at 10 years in 240 patients who were randomly assigned to undergo primary cemented total knee arthroplasty (TKA) with a single femoral component and either an all-polyethylene fixed-bearing, a modular metal-backed fixed-bearing or a mobile-bearing tibial component.

Matthew P. Abdel

“Foremost looking at 10-year survivorship free of all cause revision … in the three groups there was no significant differences between them with the rate being approximately 96%,” Abdel said.

He also noted a range of motion of approximately 110° in all three groups with no statistically significant difference, as well as no significant difference in patient function as assessed by the Knee Society Score.

“Finally, we looked at patellar tilt and found no significant difference between the three groups at 10 years,” Abdel said. – by Casey Tingle

Reference:

Abdel MP, et al. Paper #161. Presented at: American Academy of Orthopaedic Surgeons Annual Meeting; March 1-5, 2016; Orlando, Fla.

Disclosure: Abdel reports no relevant financial disclosures.