ArticleFrontiers in pediatrics2026
Postoperative remodeling and developmental improvement of femoral trochlear dysplasia in pediatric habitual patellar dislocation.
Article in Frontiers in pediatrics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Trochlear dysplasia (TD) is a major contributor to habitual patellar dislocation (HPD). However, studies on femoral trochlear remodeling after HPD surgery in children under 10 years old are limited and have small sample sizes. Purpose: This study evaluated postoperative improvements in trochlear morphology and identified factors associated with trochlear development in surgically treated children <10 years old with HPD. Methods: Clinical data of patients younger than 10 years with HPD treated between 2017 and 2023 were retrospectively reviewed. MRI was used to measure femoral sulcus angle (SA), relative trochlear depth (RTD), lateral trochlear inclination (LTI), and trochlear facet angle (TFA). Trochlear development was assessed via Dejour classification. Paired t-test and Fisher's exact test compared pre- and postoperative differences. Patients were divided into normal and poor prognosis groups; correlations between preoperative indicators, follow-up time, and postoperative TD were analyzed. GLMM logistic regression identified influencing factors, and ROC curve determined optimal cut-off values of relevant factors. Results: A total of 19 cases (24 knees) were included, with a mean age of 79.21 ± 31.26 months and mean follow-up of 35.92 ± 15.24 months. Postoperatively, SA significantly decreased ( Conclusion: Trochlear morphology significantly improves postoperatively in children <10 years old with HPD. Smaller preoperative Age and SA, and larger RTD and LTI, correlate with better postoperative outcomes; preoperative Age is an independent risk factor for poor trochlear development. Early surgery (age <73.5 months) is a favorable factor for obtaining a good prognosis in trochlear remodeling.
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