Hemiendoprosthetics of the middle facet of the subtalar joint in the complex treatment of tarsal coalition: a case report

Relevance. Tarsal coalition is a condition characterized by fusion of the bones of the posterior part of the foot and is most often clinically manifested in adolescence. Fusion of the bones of the posterior part of the foot disrupts the formation of the normal skeleton of the foot and leads to rigid deformation,severe pain syndrome and a decrease in the level of activity of patients. The results of the available treatment tactics are ambiguous, which necessitates the search for new methods to solve this problem.Aim The paper presents the medium-term results of hemiendoprosthetics of the middle articular facet of the calcaneus with an original model of an implant made of zirconium ceramics in a patient with a fibrous coalition between the talus and calcaneus in combination with concomitant surgical techniques.Materials and methods. To assess the objective condition in the pre- and postoperative periods, the patient underwent stress radiography, computed multispiral tomography (MSCT), magnetic resonance imaging (MRI), and dynamic pedobarography. To assess the patient's subjective condition before surgery and after 12 months, a questionnaire was performed using a visually analog scale (VAS), AOFAS Ankle Hindfoot (AOFAS AH).Results. According to the survey data, a decrease in the intensity of pain syndrome and an increase in patient activity are determined. Your score before treatment was 9 points, 12 months after the treatment was 1 point. The indicators of the AOFAS AH scale before and after the treatment were 21 and 90 points, respectively. The correct position of the hemiendoprosthesis is determined on control instrumental studies, no signs of instability of the implant were revealed.