Finite element analysis of pin configurations used for paediatric supracondylar humeral fractures in an adult humerus model: evaluation of a condylo-trochlear sulcus technique.

Authors

Masato Nakadai, Takuya Yoda, Nobuaki Suzuki, Naoto Tsubokawa, Koji Moriya, Hiroyuki Kawashima

Published in

International orthopaedics. Aug 10, 2026. Epub Aug 10, 2026.

Abstract

To compare the biomechanical performance of a configuration of two lateral pins and one condylo-trochlear sulcus pin (L2C1) with that of established pinning techniques using finite element analysis.
A simplified transverse distal humeral fracture model was created from quantitative computed tomography data of both humeri of a single healthy adult volunteer. Five lateral-entry and crossed pin configurations, including L2C1, were analyzed under flexion, extension, varus, valgus, internal rotation, and external rotation.
L2C1 showed the greatest fixation stability under extension, varus, and valgus loading. Under rotational loading, crossed pinning demonstrated the greatest fixation stability, whereas L2C1 showed stability comparable to lateral three-pin fixation.
In this adult humerus-based finite element model, the L2C1 configuration showed favourable fixation stability under extension, varus, and valgus loading compared with conventional lateral-entry pinning. Further anatomical, experimental, and clinical validation is required before extrapolation to paediatric supracondylar humeral fractures and clinical use.

PMID:
42573795
Bibliographic data and abstract were imported from PubMed on 10 Aug 2026.

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