Outcome of Minimally Invasive Osteosynthesis for Displaced Intra-articular Calcaneal Fractures Using Cannulated Screws: A Prospective Case Series

This prospective study sought to assess the functional and radiological outcomes of minimally invasive osteosynthesis using cannulated screws and to examine the effect of different parameters on the functional outcome. The Maryland foot score and the visual analog scale of pain were used to assess the functional outcomes and postoperative patient's satisfaction rate. Preoperative and postoperative Bo & euro;hler's angle, angle of Gissane, calcaneal width, and height, were compared. The study included 46 fractures in 40 patients; 38 (95%) males and 2 (5%) females with a mean age of 34.8 +/- 3 years. The mean time lapse to surgery was 3.2 +/- 2.1 days. The mean duration of surgery was 39.8 +/- 9.3 minutes. The mean follow-up period was 29.2 months. At final follow-up, the mean Maryland foot score was 85 +/- 6.3. Satisfactory results were achieved in 91.3% of fractures, while unsatisfactory in 8.7%. The mean visual analog scale score of pain decreased from 7.3 +/- 05 preoperatively to 1.2 +/- 0.7 at the final follow-up, p <.001. Postoperatively, there was significant improvement of Bo & euro;hler's angle, angle of Gissane, calcaneal width, and height, p < .001. Factors associated with better functional outcomes included reduced time lapse to surgery, p =.032, and more accurate restoration of the calcaneal parameters. Management of intra-articular calcaneal fractures by minimally invasive osteosynthesis using cannulated screws can achieve satisfactory functional and radiological outcomes. Better outcomes are associated with reduced time lapse to surgery, and accurate reduction and restoration of calcaneal angles, height, and width. (c) 2020 by the American College of Foot and Ankle Surgeons. All rights reserved.