Dept. of Orthopedic Surgery, Hvidovre Hospital, Copenhagen University Hospital, Denmark; Department of Orthopedic Surgery, Sjaelland University Hospital, Køge, Denmark.
Human Movement Analysis Laboratory, Dept. of Orthopedic Surgery, Hvidovre Hospital, Copenhagen University Hospital, Denmark.
Foot Ankle Surg. 2020 Jun;26(4):432-438. doi: 10.1016/j.fas.2019.05.012. Epub 2019 May 22.
The aim of this study was to examine the biomechanical gait effects and range of motion following a proximal hemiarthroplasty with a HemiCap®.
Forty-one HemiCAP-operated participants with a mean follow-up time of 5 years had plantar force variables (PFVs) examined and compared with their non-operated foot and a control group. PFVs were compared to the MTPJ1 range of motion (ROM), and pain measured by Visual Analog Scale (VAS).
The HemiCAP participants' operated feet had higher PFVs laterally on the foot and lower PFVs under the hallux. Dorsal ROM of the operated feet was a median 45° (range 10-75) by goniometer and 41.5 (range 16-80) by X-ray. An increase in ROM decreased the forces under the hallux. Most participants were pain-free. No correlation between pain and PFVs was found.
Increased dorsiflexion decreased the maximum force under the hallux. A mid-term HemiCAP maintains some motion. The decreased PFVs under the hallux may reflect a patient reluctance to load the first ray, although no correlation between plantar forces and pain was found.
本研究旨在探讨 HemiCap® 半髋关节成形术后的生物力学步态影响和活动范围。
41 例 HemiCAP 手术患者平均随访时间为 5 年，对其足底压力变量（PFVs）进行了检查，并与未手术的脚和对照组进行了比较。PFVs 与 MTPJ1 活动范围（ROM）和视觉模拟量表（VAS）测量的疼痛进行了比较。
HemiCAP 组患者手术脚的足部外侧 PFVs 较高，而大脚趾下的 PFVs 较低。手术脚的背屈 ROM 通过量角器测量为中位数 45°（范围 10-75），通过 X 射线测量为 41.5°（范围 16-80）。ROM 的增加降低了大脚趾下的力。大多数患者无疼痛。未发现疼痛与 PFVs 之间存在相关性。
背屈增加降低了大脚趾下的最大力。中期 HemiCAP 保持一定的运动。大脚趾下的 PFVs 减少可能反映了患者不愿负重第一跖骨，尽管未发现足底力与疼痛之间存在相关性。
