Ji-Yong Ahn1, Ho-Seong Lee1, Chul-Ho Kim1, Jin-Pil Yang1, Soo-Sung Park2. 1. Department of Orthopaedic Surgery, Asan Medical Center Children's Hospital, University of Ulsan, College of Medicine, Seoul, South Korea. 2. Department of Orthopaedic Surgery, Asan Medical Center Children's Hospital, University of Ulsan, College of Medicine, Seoul, South Korea sspark@amc.seoul.kr.
Abstract
BACKGROUND: We investigated radiographic changes of calcaneocuboid (CC) joint subluxation following calcaneal lengthening procedure for the treatment of pediatric planovalgus foot deformities. METHODS: This study included 44 cases of planovalgus foot deformities in 24 patients with mean age of 9.7 (range, 8 to 13) years who underwent calcaneal lengthening between 1999 and 2011. The mean follow-up period was 25 (range, 12 to 159) months. Anteroposterior (AP) and lateral radiographs of the weight-bearing view of the foot from immediate postoperative, 3-month postoperative, and last follow-up evaluations were reviewed and also used for trend analysis. Percentage of CC joint subluxations was measured on both AP and lateral view of the foot. Correlations between the percentage of CC joint subluxation and follow-up periods were assessed. RESULTS: All of the feet showed dorsal subluxation of their CC joint on the immediate postoperative lateral plain radiographs. The median percentage of dorsal subluxation of the CC joint improved from 26.0% (range, 10.0 to 67.0) at the immediate postoperative evaluation to 16.5% (range, 7.0 to 47.0, P = .0001) at the 3-month postoperative evaluation and to 11% (range, 2.0 to 30.0, P = .0003) at last follow-up. The trend analysis over time indicated that the CC joint subluxation percentage with calcaneal lengthening generally decreased over time (r s = -.67, P = .001). No patients showed osteoarthritic changes in the CC joint or nonunion at the calcaneal osteotomy site at last follow-up. CONCLUSION: At midterm follow-up, the CC joint subluxation was gradually resolving over time, with no evidence of osteoarthritic change in the CC joint. LEVEL OF EVIDENCE: Level IV, case series.
BACKGROUND: We investigated radiographic changes of calcaneocuboid (CC) joint subluxation following calcaneal lengthening procedure for the treatment of pediatric planovalgus foot deformities. METHODS: This study included 44 cases of planovalgus foot deformities in 24 patients with mean age of 9.7 (range, 8 to 13) years who underwent calcaneal lengthening between 1999 and 2011. The mean follow-up period was 25 (range, 12 to 159) months. Anteroposterior (AP) and lateral radiographs of the weight-bearing view of the foot from immediate postoperative, 3-month postoperative, and last follow-up evaluations were reviewed and also used for trend analysis. Percentage of CC joint subluxations was measured on both AP and lateral view of the foot. Correlations between the percentage of CC joint subluxation and follow-up periods were assessed. RESULTS: All of the feet showed dorsal subluxation of their CC joint on the immediate postoperative lateral plain radiographs. The median percentage of dorsal subluxation of the CC joint improved from 26.0% (range, 10.0 to 67.0) at the immediate postoperative evaluation to 16.5% (range, 7.0 to 47.0, P = .0001) at the 3-month postoperative evaluation and to 11% (range, 2.0 to 30.0, P = .0003) at last follow-up. The trend analysis over time indicated that the CC joint subluxation percentage with calcaneal lengthening generally decreased over time (r s = -.67, P = .001). No patients showed osteoarthritic changes in the CC joint or nonunion at the calcaneal osteotomy site at last follow-up. CONCLUSION: At midterm follow-up, the CC joint subluxation was gradually resolving over time, with no evidence of osteoarthritic change in the CC joint. LEVEL OF EVIDENCE: Level IV, case series.
Authors: Dong Hun Suh; Jung Ho Park; Soon Hyuck Lee; Hak Jun Kim; Young Hwan Park; Woo Young Jang; Jung Heum Baek; Hyun Jae Sung; Gi Won Choi Journal: Int Orthop Date: 2019-01-30 Impact factor: 3.075