In vivo Kinematic Characteristics of the Elbow during Active Flexion-Extension Motion Using Dual Fluoroscopic Imaging System
10.16156/j.1004-7220.2020.05.16
- VernacularTitle:应用动态双平面成像技术研究在体肘关节主动屈伸运动特征
- Author:
Diyang ZOU
1
;
Xiangjun HU
1
;
Hai HU
2
;
Weihua GONG
3
;
Tsungyuan TSAI
1
,
3
Author Information
1. School of Biomedical Engineering, Shanghai Jiao Tong University
2. Biomechanical Laboratory of Bone and Jonts, Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital
3. Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine
- Publication Type:Journal Article
- Keywords:
elbow joint;
flexion-extension motion;
in vivo kinematics;
dual fluoroscopic imaging system (DFIS）
- From:
Journal of Medical Biomechanics
2020;35(5):E622-E628
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the translation and rotation of healthy elbow joints during active flexion and extension, so as to provide references for the treatment of elbow instability and injuries. Methods Ten healthy subjects with no history of upper extremity trauma were recruited. Dual fluoroscopic imaging system (DFIS) was applied to quantify six-degree-of-freedom (6-DOF) kinematics of humeroulnar and humeroradial joint from full extension to maximum flexion in supination position. Correlation analysis was used to evaluate the relationship between the 6-DOF kinematics of the elbow joint. Results Valgus angle of humeroulnar joint gradually decreased from 15.2°±3.1° to 5.3°±2.3° with the flexion increasing. Valgus angle of humeroradical joint gradually decreased from 19.7°±4.2° to 8.2°±2.4° from full extension to maximum flexion. The valgus angle of humeroulnar and humeroradial joint was linearly related to the flexion angle during flexion and extension. The internal rotation of humeroulnar joint was quadratic nonlinearly related to the flexion angle during motion. The maximum internal rotation of the ulnar was 4.0°±4.9° at 110° flexion, and the maximum external rotation was 5.1°±4.2°. The internal rotation of humeroulnar joint gradually increased from 3.2°±16.0° to 27.2°±18.0°. Conclusions During normal flexion and extension of the elbow, the valgus angle of humeroulnar joint decreased linearly, while the internal and external rotation angle showed a nonlinear change, which first rotated internally and then rotated externally. The valgus angle of humeroradial joint decreased linearly and the internal rotation angle increased linearly. Therefore, humeroulnar joint is not a hinge joint during elbow flexion and extension. There is a kinematic difference between humeroulnar joint and humeroracial joint. For clinical treatment of complex elbow injuries, elbow instability and elbow replacement, different motion characteristics in joints should be considered to improve the outcome after surgery.
