ArticleJournal of orthopaedic surgery and research2025
No evidence of intra-articular knee deformity following growth arrest through temporary epiphysiodesis - a retrospective study of 81 patients.
Article in Journal of orthopaedic surgery and research, 2025. 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
backgroundTemporary epiphysiodesis (tED) around the knee is a well-established treatment approach for leg length discrepancies (LLD) in skeletally immature patients. Moreover, it may be conducted bilaterally to reduce height in tall stature. However, secondary changes in the bony morphology of the tibial plateau after tED have been reported. This study thus aimed to evaluate secondary alterations in knee joint morphology following tED around the knee.
methodsRadiographs of 81 skeletally immature patients aged 7-15 years were retrospectively analysed. 10/81 patients underwent bilateral tED with RigidTacks
resultsMean treatment duration was 2.7 years (standard deviation (SD) 1.1). Statistically relevant changes were observed in WFP (p=0.025), FNID (p=0.008), and MAD (p=0.002) after tED using EP, and in FNID (p=0.043) using RT. Compared with reference values for untreated healthy children, these relevant changes remained within one SD. Mean absolute MAD change using EP was 3.9 mm (SD 7.1) compared to 1.9 mm (SD 8.8) using RT. Secondary coronal malalignment with need for revision surgery was found in 11/81 patients (4/35 with EP, 7/46 with RT).
conclusionsStatistically relevant changes in bony morphology after tED were only observed in the distal femur. However, there was no evidence of intra-articular knee deformities as all measured femoral and tibial parameters remained within physiological margins and were considered clinically inconsequential. Nevertheless, there was a considerable number of patients with secondary coronal malalignment among both implant groups, necessitating further elucidation.
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