Chinese Journal of Tissue Engineering Research ›› 2025, Vol. 29 ›› Issue (3): 486-492.doi: 10.12307/2025.111

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Quantification of in vivo biomechanics and analysis of influencing factors in cervical spine fixed-point rotation manipulation

Liang Jiyao1, Zhou Honghai2, 3, 4, Wei Guikang2, Su Shaoting1, Chen Longhao2, 5, He Xinyu1, Liu Liangpu1   

  1. 1Graduate School of Guangxi University of Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 2Orthopedic College, Guangxi University of Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 3Guangxi Key Laboratory of Biomechanics and Injury Repair in Traditional Chinese Medicine Orthopedics and Traumatology, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 4Research Center for the Inheritance and Development of Academic Thought and Clinical Diagnosis and Treatment of Wei Guikang Master of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 5Third Clinical Medical College Affiliated to Zhejiang Chinese Medical University, Hangzhou 310000, Zhejiang Province, China 
  • Received:2023-11-07 Accepted:2023-12-18 Online:2025-01-28 Published:2024-06-03
  • Contact: Zhou Honghai, MD, Professor, Orthopedic College, Guangxi University of Chinese Medicine, Nanning 530001, Guangxi ZhuangAutonomous Region, China; Guangxi Key Laboratory of Biomechanics and Injury Repair in Traditional Chinese Medicine Orthopedics and Traumatology, Nanning 530001, Guangxi Zhuang Autonomous Region, China; Research Center for the Inheritance and Development of Academic Thought and Clinical Diagnosis and Treatment of Wei Guikang Master of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China
  • About author:周红海，博士，教授，广西中医药大学骨伤学院，广西中医骨伤科生物力学与损伤修复重点实验室，国医大师韦贵康学术思想与临床诊疗传承发展研究中心，广西壮族自治区南宁市 530001
  • Supported by:
    Guangxi Natural Science Foundation Project, No. 2023GXNSFAA026297 (to ZHH); Guangxi University of Chinese Medicine Autonomous Region Master’s Research Innovation Project, No. YCSW2023375 (to LJY); Key Medical and Health Project of Guangxi Health Department, No. ZD200857 (to ZHH); a grant from Guangxi Department of Education, No. 200420 (to ZHH) 

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Abstract: BACKGROUND: Fixed-point rotation manipulation of cervical spine is a mechanical operation with high technical requirements, but the biomechanics of fixed-point manipulation of cervical spine still lacks relevant quantitative data. Moreover, the research on the influencing factors of cervical fixed-point rotation manipulation includes many parameters and there are differences, so it is necessary to further analyze its influencing factors to improve its related data.
OBJECTIVE: To quantify the biomechanical parameters of cervical spine fixed-point rotation manipulation, explore the correlation between different biomechanical parameters, and the influence of individual characteristics of the subjects on the biomechanical parameters of cervical spine fixed-point rotation manipulation.
METHODS: Totally 35 cases of cervical spondylosis were Outpatients from Orthopedic Department of Renai Branch of the First Affiliated Hospital of Guangxi University of Chinese Medicine and selected as the subjects investigated. Wearable mechanical measuring gloves were used to collect biomechanical parameters of cervical spine fixed-point rotation manipulation, including: thumb preload, thumb maximum thrust, palm preload, palm wrench force, and palm wrench maximum force. Personal characteristic parameters were collected, including age, height, weight, and neck circumference. The key biomechanical parameters in the process of cervical spine fixed-point rotation manipulation were analyzed and different individual characteristics were quantified. The results of biomechanical parameters were analyzed using Spearman correlation analysis. The possible effects of different individual characteristic parameters on biomechanics were analyzed.
RESULTS AND CONCLUSION: (1) Compared with bilateral mechanical parameters, there was no significant difference between left manipulation and right manipulation (P > 0.05). (2) The average of thumb preload force was (7.21±1.19) N; the average of thumb maximum thrust was (28.40±4.48) N; the average of palm preload was (5.67±2.49) N; the average of palm wrench force was (10.90±5.11) N, and the average of palm wrench maximum force was (16.00±7.27) N. (3) There was a significant positive correlation between palm preload and palm wrench force (Rs=0.812, P < 0.01). There was a significant positive correlation between palm preload and palm wrench maximum force (Rs=0.773, P < 0.01). There was a significant positive correlation between palm wrench force and palm wrench maximum force (Rs=0.939, P < 0.01). (4) The weight was positively correlated with thumb preload, palm preload, palm wrench force and palm wrench maximum force (P < 0.05). (5) These findings confirm that there is a certain biomechanical standard value in the operation of cervical spine fixed-point rotation manipulation to treat cervical spondylosis. There is no significant difference between the left and right manipulations, which indicates that the manipulation has good consistency and repeatability. There is consistency and coordination among palm preload force, palm wrench force, and palm wrench maximum force. Their contributions to the therapeutic effect are similar. Body weight is an important factor affecting cervical spine fixed-point rotation manipulation.

Key words: cervical spine fixed-point rotation manipulation">, biomechanics">, influencing factor analysis">, quantitative research">, cervical spondylosis">, bone-setting manipulation">, conservative treatment">, individual characteristics

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