First metatarsophalangeal joint arthrodesis: a new technique of internal fixation by using memory compression staples.

A prospective clinical study of first metatarsophalangeal joint arthrodesis using memory compression staples is presented. In 27 patients, 30 feet underwent surgery. There were 24 women and 3 men, with a mean age of 61.2 years. Two memory compression staples were used at right angles to each other to achieve compression at the fusion site. Postoperatively, patients were allowed full weightbearing in a rigid-soled shoe. Subjective assessment was performed with a standard questionnaire, which included questions regarding level of pain, ambulation, and patient satisfaction. Objective assessment was performed by a clinical and included a radiographic examination. There was a postoperative reduction in the pain score from 4.6 to 1.6 (P < .0001). Ambulation ability improved from 4 to 2.5 (P < .0001). Patients reported 86.6% excellent to good results, and 96.7% achieved radiographic fusion at an average 8.2 weeks. The only significant postoperative complication was a single nonunion. The authors advocate memory compression staples for the internal fixation of first metatarsophalangeal joint arthrodesis. The implant is low profile, and postoperative cast immobilization is not required. The use of this device has a predictable success rate comparable to previously reported methods.