Interpositional arthroplasty showed good clinical results high patient satisfaction

TORONTO — Patients who underwent interpositional arthroplasty of the first metatarsophalangeal joint experienced good clinical outcomes and more than half reported excellent satisfaction, according to results presented at the American Orthopaedic Foot & Ankle Society Annual Meeting.

“Our conclusion is that interpositional arthroplasty demonstrates good clinical results, even at long-term final follow-up, and we believe this is a useful alternative procedure for the treatment of hallux rigidus,” Michael Aynardi, MD, said in his presentation here.

Aynardi and colleagues analyzed 199 patients (77% were women) who underwent interpositional arthroplasty between 2000 to 2015. Patients were assessed for satisfaction scoring, survivorship and functional scoring. Researchers defined failure as reoperation of the hallux after the index procedure.

Michael Aynardi

At an average follow-up of 4.5 years, results showed 67% of patients reported excellent satisfaction scores.

“Nearly 83% of patients were able to return to fashionable shoe wear, and the average foot function index administered at the time of final follow-up was 77.1,” Aynardi said.

He noted a failure rate of 3.125%, with no statistically significant difference between patients in the autograft group and the allograft group. According to results, the average time to failure was 8.8 months.

“Metatarsalgia occurred in nearly 17% and this was more common in the allograft group,” Aynardi said. “Cock-up deformity was 4%, and deep infection requiring return to the OR occurred in almost 2% of patients.” – by Casey Tingle

Reference:

Aynardi M, et al. Long-term outcome following interpositional arthroplasty of the first metatarsophalangeal joint. Presented at: American Orthopaedic Foot & Ankle Society Annual Meeting; July 21-23, 2016; Toronto.

Disclosure: Aynardi reports no relevant financial disclosures.