School of Medical Imaging, Xuzhou Medical University, Xuzhou, China.
Department of Orthopaedic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, China.
Sci Rep. 2024 Jun 22;14(1):14402. doi: 10.1038/s41598-024-65422-5.
Intoeing in children is a common parental concern, but our understanding of the impact of foot progression angle (FPA) in these children leaves remains limited. This study examines the relationship between FPA and plantar loading pattern, as well as gait symmetry in children with intoeing. The sample included 30 children with intoeing caused by internal tibial torsion, uniformly divided into three groups: unilateral intoeing, bilateral mild intoeing, and bilateral mild-moderate intoeing. The relationship between FPA and plantar loading pattern, and gait symmetry within and among groups were assessed using dynamic pedobarographic and spatiotemporal data. Results indicated a significant correlation between FPA and peak pressure, maximum force, and plantar impulse in the medial and central forefoot, and also the medial and lateral heel zones for both bilateral intoeing groups. Significant differences were observed only in subdivided stance phase, including loading response, single support, and pre-swing phases, between the unilateral intoeing and bilateral mild intoeing groups. These findings suggest that FPA significantly affects the forefoot and heel zones, potentially increasing the load on the support structures and leading to transverse arch deformation. While children with intoeing demonstrate a dynamic self-adjustment capability to maintain gait symmetry, this ability begins to falter as intoeing becomes more pronounced.
内八字在儿童中较为常见，家长通常对此比较担忧，但是我们对内八字儿童足进角（FPA）的影响的了解还十分有限。本研究旨在探讨 FPA 与足底负荷分布模式以及内八字儿童步态对称性之间的关系。研究对象为 30 名由胫骨内扭转引起的内八字儿童，将其均分为三组：单侧内八字、双侧轻度内八字和双侧中轻度内八字。通过动态足底压力和时空数据评估 FPA 与足底负荷分布模式以及组内和组间步态对称性之间的关系。结果表明，FPA 与内侧和中央前足、内侧和外侧足跟区域的峰值压力、最大力和足底冲量之间存在显著相关性，双侧内八字组均如此。仅在单侧内八字和双侧轻度内八字组之间的支撑相细分阶段（包括负重反应、单足支撑和预摆阶段）观察到显著差异。这些发现表明 FPA 显著影响前足和足跟区域，可能会增加支撑结构的负荷，导致横弓变形。虽然内八字儿童具有维持步态对称性的动态自我调节能力，但随着内八字的加重，这种能力开始减弱。
