Effects of subtalar fusion on distribution of plantar pressures
10.3760/cma.j.cn115530-20241111-00436
- VernacularTitle:距下关节融合术对足底压力分布的影响
- Author:
Chonglin YANG
1
;
Xiangyang XU
1
;
Changjun GUO
1
;
Yongxing CAO
1
;
Yunfeng YANG
1
Author Information
1. 上海交通大学医学院附属瑞金医院骨科，上海 201801
- Publication Type:Journal Article
- Keywords:
Subtalar joint;
Arthrodesis;
Pressure;
Degeneration;
Gait
- From:
Chinese Journal of Orthopaedic Trauma
2025;27(1):64-69
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To clarify the effects of simple subtalar fusion on distribution of plantar pressures.Methods:A retrospective study was conducted to analyze the 19 patients who had undergone simple subtalar fusion between January 2006 and December 2020 at Department of Orthopedics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine. There were 13 males and 6 females with an age of (42.1±11.8) years and a duration of disease of 1.7 (1.0, 2.0) years. Another 14 normal subjects were recruited as normal controls [7 males and 7 females, with an age of (25.0±1.9) years]. The data of plantar pressure distribution were detected and analyzed by a Belgian Footscan? plantar pressure tester. The affected and healthy sides of the patients were compared with those of the normal group to analyze the peak pressures on different foot regions.Results:There was no significant difference in height or weight between the patients and the normal subjects ( P>0.05). The peak pressures on the first to the third metatarsal region of the forefoot and the medial region of the hindfoot of the affected foot were significantly lower than those of the normal foot in the patients ( P<0.05). The peak pressure on the forefoot region of a normal foot appeared in the third metatarsal region. In the patients, the peak pressure on the forefoot region of a healthy side shifted inward and appeared in the second metatarsal region, but the peak pressure on the forefoot region of an affected side shifted laterally and appeared in the fourth metatarsal region. The peak pressure on the midfoot of an affected side [(4.38±2.17) N/cm 2] was significantly higher than that on a healthy side [(3.04±1.80) N/cm 2] in the patients ( P=0.035). The peak pressures on the medial and lateral hindfoot regions of a healthy side were (7.12±1.91) N/cm 2 and (7.98±2.03) N/cm 2, respectively, showing no significant difference ( P=0.086). The peak pressure on the lateral hindfoot region of an affected side [(10.77±4.21) N/cm 2] was significantly higher than that on the medial hindfoot region [(8.71±2.89) N/cm 2] ( P=0.009). The peak plantar pressures on the affected side shifted to the lateral side in the patients. Conclusions:Subtalar fusion can exert significant effects on the distribution of plantar pressures. Specifically, the plantar pressures shift to the lateral side of an affected foot during all the gait stages while the plantar pressures on the healthy forefoot may compensate by transferring to the medial side in the patients.
