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Children's Orthopaedics

DISTAL TIBIAL RECONSTRUCTION IN CHILDREN

British Society for Children's Orthopaedic Surgery (BSCOS)



Abstract

We report the results of a retrospective review of patients that underwent distal tibial deformity correction with transphyseal or supramalleolar osteotomy with or without tibial lengthening. The aims of the procedures performed were to obtain equal leg length, restore the alignment of the ankle joint and tibio—fibular relationship. Supramalleolar osteotomy enables deformity correction, can be combined with lengthening and is appropriate where the tibio—fibular relationship is normal. When the tibio—fibular relationship is abnormal, as is often the case with bone dysplasias, differential tibio—fibular lengthening can be performed. If physeal arrest has occurred, for example after sepsis, deformity correction can be achieved with a transphyseal osteotomy allowing correction and ensuring epiphysiodesis. When the fibular length is excessive, transphyseal osteotomy can be combined with a fibular shortening. Our review encompassed 12 patients over a period of 10 years with 5 having deformity after previous meningococcal septicaemia, 4 with fibular hemimelia, 2 with a history of previous trauma and 1 with deformity occurring after a compartment syndrome as a consequence of snake bite. Seven transphyseal osteotomies were performed in 5 patients (2 bilateral), 4 with deformity secondary to meningococcal septicaemia and 1 with deformity secondary to previous trauma. After 1 transphyseal osteotomy there was recurrent distal tibial deformity (14%) which occurred within 1 year requiring a later supramalleolar dome osteotomy. Of the other 6 transphyseal osteotomies all healed with no residual leg—length inequality or deformity. Seven patients underwent supramalleolar osteotomies with all healing and recurrent deformity occurring in 1 patient (14%). Future lengthening is required in 2 patients and 1 patient will undergo a subtalar joint arthrodesis for a painful valgus hindfoot. Distal tibial deformity correction is challenging but our results show that providing the stated principles are adhered to, successful management with an acceptable recurrent deformity rate is possible.