Highly crosslinked polyethylene liner delivers ‘excellent’ clinical outcomes in THA for osteonecrosis
For patients with osteonecrosis, primary total hip arthroplasty with a highly cross-linked polyethylene liner has shown excellent implant survivorship and functional effects, according to study results.
Matthew P. Abdel, MD, and colleagues examined 840 THAs with highly cross-linked polyethylene liners (413 patients with osteonecrosis, 427 patients with osteoarthritis) for a median of 10 years postoperatively, and evaluated and compared implant survivorship, patient-reported outcomes and radiographic data between the groups.
“In this long-term investigation of patients with osteonecrosis undergoing primary THA at the Mayo Clinic with highly cross-linked polyethylene, we found the 15-year cumulative rates of revisions and reoperations were slightly higher than a well-matched group of patients who underwent primary THA for osteoarthritis,” Abdel told Healio Orthopedics.
Revision rates were 6.6% and 4.5% in the osteonecrosis and osteoarthritis groups, respectively, with reoperation rates of 10.5% and 6.4%, respectively. Subsequently, researchers found no signs of implant loosening or osteolysis in any patients, according the study abstract.
“The risk was highest for those with idiopathic osteonecrosis, and lowest for those with radiation-induced osteonecrosis,” Abdel said. “However, it is important to note that patients with osteonecrosis undergoing primary THA at Mayo Clinic did indeed have excellent long-term implant survivorship and clinical outcomes.” – by Max R. Wursta
Hart A, et al. ePaper 020. Presented at: American Academy of Orthopaedic Surgeons Annual Meeting; March 24-28, 2020 (meeting canceled).
Disclosure: Abdel reports he is a board member of the American Academy of Orthopedic Surgeons and receives royalties from Stryker.