Lateral Column Lengthening Effect on Total Subtalar Joint Range of Motion: A Pilot Study

Lateral column lengthening (LCL) calcaneal osteotomy is a well-established surgical procedure used in flexible flatfoot reconstructive surgery. The effects of LCL on subtalar joint (STJ) range of motion (ROM) have not been thoroughly explored in the literature. Our study aimed to objectively measure the average decrease in the total ROM of the STJ following LCL. A retrospective cohort study was conducted on 15 patients (20 feet) who underwent LCL for various indications. Data for STJ ROM was collected from both the preoperative and postoperative periods. Mean follow-up for the cohort was 12 weeks postoperatively. The mean total preoperative STJ ROM was 39.65 ± 2.52 degrees, while the mean total postoperative STJ ROM was 19.17 ± 2.62 degrees (p < 0.001). This represents a statistically significant reduction of 20.48 degrees (48% decrease) in STJ ROM from preoperative to postoperative measurements. This study provides the first objective measurement of the STJ ROM decrease following LCL calcaneal osteotomy on patients in vivo. The findings highlight the substantial impact of the procedure on the ROM in the STJ. These results have important implications for patient management and should be considered when evaluating the outcomes of LCL procedures. Further research is warranted to explore the functional consequences and long-term effects of the reduced STJ ROM and to develop strategies for optimizing foot function in patients undergoing this procedure.