First Metatarsophalangeal Joint Arthrodesis Using Memory Staples: Clinical and Functional Results

Background. We present clinical and functional results of first metatarsophalangeal joint (MTPJ) arthrodesis using Memory staples. Methods. This retrospective observational study reviewed MTPJ arthrodesis with Memory staples from 2012 to 2016. Results. The mean age of 50 patients (55 feet) was 63 years (range 41-77 years). Forty-one feet were in women. Indication was hallux rigidus (n = 49) and hallux valgus (n = 6). The overall union rate was 98.2% (n = 54 of 55), including delayed healing in 3 (5.5%). The average time to union was 12 weeks. At a mean follow-up of 38 months (range 12-73 months), the mean Foot and Ankle Ability Measure score (47 out of 55, 86% response rate) was 87% (interquartile range 78%-100%). Complications included partial laceration of extensor hallucis longus (n = 1), wound infection (n = 4), wound-related (n = 2), lesser metatarsalgia (n = 3), cock up deformity (n = 1), and pain (n = 3). Conclusions. The high union rate, good patient satisfaction scores, and low rate of complications support our use of Memory staples.Levels of Evidence: Therapeutic, Level IV.