Abstract
BACKGROUND: Epiphysiodesis is used to correct the leg length discrepancy in children. The results of the effectiveness in different studies using epiphysiodesis with 8-plates. Forecasting is a fundamental provision of the methodology to apply epiphysiodesis.
 AIM: To determine the comparative effectiveness of temporary epiphysiodesis with 8-plates in correcting the difference in size of the lower limbs in children, depending on the age of the patient and the segment of epiphysiodesis.
 MATERIALS AND METHODS: We included data from a retrospective analysis of the results of correcting the leg length discrepancy using the method of guided growth in 94 patients. The technique included the use of two 8-plates. The calculation of comparative indicators was used, while the difference in the ratios of lengths of the epiphysiodesed and paired segments before epiphysiodesis and at the time of completion of guided growth (removal of metal structures) was determined as an indicator of the effectiveness of treatment.
 RESULTS: The maximum efficiency was observed with epiphysiodesis of the femur in children of the younger age group (a change of 7.59% in the length of the bone), the minimum was observed with epiphysiodesis of the tibia in children of the older age group (a change in length of 2.04%). The decrease in the effectiveness of femoral epiphysiodesis depending on age was linear, while that between the efficiency indicators in the younger and middle groups was 1.85%, and between the middle and older groups was 2.8%. In epiphysiodesis of the tibia, the difference between the efficiency indicators in the younger and middle age groups was 2.42%, and that between the middle and older age group was 0.34%.
 CONCLUSIONS: Temporary epiphysiodesis with 8-plates is effective in correcting the LLDs in children. The use of the comparative efficiency indicators obtained in different age groups allows us to plan the intervention more accurately and avoid unnecessary operations.
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