Michelson James D, Janowski Jessie W, Charlson Mark D
Department of Orthopaedics and Rehabilitation, University of Vermont Medical Center, Burlington, VT, USA.
Department of Orthopaedics and Rehabilitation, University of Vermont Medical Center, Burlington, VT, USA.
Foot Ankle Surg. 2018 Oct;24(5):435-439. doi: 10.1016/j.fas.2017.04.017. Epub 2017 May 17.
Previous qualitative studies have linked first metatarsal head morphology with hallux valgus (HV) and hallux rigidus (HR). This study used a quantitative measurement of 1st MT radius of curvature to assess if HR MT heads were flatter than HV heads.
Weight bearing foot films were used in HV, HR, and normal patients (no forefoot complaints) to measure the metatarsal head radius of curvature (normalized by dividing the radius of curvature by the first metatarsal length to adjust for magnification and foot size).
Radiographs from 299 feet were analyzed (105 normal, 57 HR, and 137 HV). The mean normalized radius of curvature was smaller in HV than HR, with normal feet in between (p<.05 for all comparisons). Metatarsal head curvature did not vary with age, weight, or BMI.
These quantitative measurements are consistent with qualitative observations, validating the use of subjective metatarsal head morphology assessments.
先前的定性研究已将第一跖骨头形态与拇外翻（HV）和僵硬性拇趾（HR）联系起来。本研究采用第一跖骨曲率半径的定量测量方法，以评估僵硬性拇趾的跖骨头是否比拇外翻的更扁平。
对拇外翻、僵硬性拇趾和正常患者（无前足不适）使用负重足部X线片测量跖骨头曲率半径（通过将曲率半径除以第一跖骨长度进行归一化，以校正放大率和足部大小）。
分析了来自299只脚的X线片（105只正常脚、57只僵硬性拇趾脚和137只拇外翻脚）。拇外翻患者的平均归一化曲率半径小于僵硬性拇趾患者，正常脚的曲率半径介于两者之间（所有比较p<0.05）。跖骨头曲率不随年龄、体重或体重指数而变化。
这些定量测量结果与定性观察结果一致，验证了主观跖骨头形态评估的应用。
