School of Health Sciences, University of Salford, Salford, UK.
Department of Exercise and Sport Science, Manchester Metropolitan University, Crewe Campus, Crewe, UK.
J Foot Ankle Res. 2017 Feb 3;10:7. doi: 10.1186/s13047-017-0189-2. eCollection 2017.
The Root model of normal and abnormal foot function remains the basis for clinical foot orthotic practice globally. Our aim was to investigate the relationship between foot deformities and kinematic compensations that are the foundations of the model.
A convenience sample of 140 were screened and 100 symptom free participants aged 18-45 years were invited to participate. The static biomechanical assessment described by the Root model was used to identify five foot deformities. A 6 segment foot model was used to measure foot kinematics during gait. Statistical tests compared foot kinematics between feet with and without foot deformities and correlated the degree of deformity with any compensatory motions.
None of the deformities proposed by the Root model were associated with distinct differences in foot kinematics during gait when compared to those without deformities or each other. Static and dynamic parameters were not correlated.
Taken as part of a wider body of evidence, the results of this study have profound implications for clinical foot health practice. We believe that the assessment protocol advocated by the Root model is no longer a suitable basis for professional practice. We recommend that clinicians stop using sub-talar neutral position during clinical assessments and stop assessing the non-weight bearing range of ankle dorsiflexion, first ray position and forefoot alignments and movement as a means of defining the associated foot deformities. The results question the relevance of the Root assessments in the prescription of foot orthoses.
正常和异常足部功能的 Root 模型仍然是全球临床足部矫形实践的基础。我们的目的是研究足部畸形与运动学代偿之间的关系，这些是该模型的基础。
采用方便抽样法筛选了 140 名参与者，邀请了 100 名无症状的 18-45 岁参与者参加。使用 Root 模型描述的静态生物力学评估来确定五种足部畸形。使用 6 节段足部模型测量步态中的足部运动学。统计检验比较了有和无足部畸形的足部运动学，并将畸形程度与任何代偿运动相关联。
与无畸形或彼此相比，Root 模型提出的任何畸形在步态期间的足部运动学中均未显示出明显差异。静态和动态参数之间没有相关性。
作为更广泛证据的一部分，本研究的结果对临床足部健康实践具有深远的意义。我们认为，Root 模型所倡导的评估方案不再是专业实践的合适基础。我们建议临床医生在临床评估中停止使用距下关节中立位，停止评估非负重状态下的踝关节背屈、第一跖骨位置和前足对线和运动，以此来确定相关的足部畸形。这些结果质疑了 Root 评估在足部矫形器处方中的相关性。
