Early Unprotected Weight Bearing and Pre-Scheduled Supervised Rehabilitation Program after Surgical Treatment of Ankle Fractures

Abstract

Background: Ankle fractures represent one of the most common orthopedic injuries in the lower extremity. Weight-bearing and rehabilitation protocols after surgical treatment of ankle fracture have recently evolved from traditional methods to full weight-bearing protocols. However, more evidence is needed on unprotected immediate weight-bearing along with a standardized rehabilitation program. The purpose of this study was to evaluate effects of unprotected immediate weight-bearing as tolerated and an eight-week prescheduled supervised rehabilitation program on the midterm clinical and functional outcomes of surgically treated ankle fractures, and to compare functional results with the unaffected side. Methods: Eighty patients (24F and 56M) who underwent rigid fixation of bimalleolar ankle fractures were included (mean age 41.57 +/- 13.22 years). Preoperative radiographs and computed tomography scans were used to evaluate and classify the fractures. The fractures were classified using Lauge-Hansen classification system. Ankle ROMs, Pain Disability Index (PDI), American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scores, and Short Form-36 scores were evaluated. Patients were allowed unprotected weight-bearing on the immediate postoperative period and a standardized supervised prescheduled rehabilitation program was undertaken following surgery. Results: The mean follow-up period was 30.32 +/- 6.91 months. Based on Lauge-Hansen classification, supination-external rotation injuries were found in 32(40%) patients, supination adduction injuries in 14(17.4%) patients, pronation-external rotation injuries in 28(35%) patients, and pronation-abduction fractures in 6(7.6%) patients. The solid union was achieved in all patients at the final follow-up. The mean PDI score was 12.78 +/- 14.78, and the AOFAS score was 80.93 +/- 17.24. Although patients' health-related quality of life was at a good level, the injured-side ankle ROM was lower than the healthy side (P <= 0.05). Conclusion: Satisfactory clinical and functional outcome can be achieved at mid-term with unprotected weight-bearing as tolerated and pre-scheduled supervised eight-week rehabilitation program following rigid internal fixation of ankle fractures. However, this protocol is not studied in patients with associated comorbidities.