Chinese Journal of Tissue Engineering Research ›› 2025, Vol. 29 ›› Issue (27): 5773-5784.doi: 10.12307/2025.832

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Biomechanical analysis on treatment of different types of osteoporotic vertebral compression fractures with individualized precise puncture vertebral augmentation

Pan Hongyu1, Li Hongtao1, Xiao Changming1, Li Sen2   

  1. 1Department of Spine Surgery, Hospital of Traditional Chinese Medicine Affiliated to Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Department of Spine Surgery, Nanjing Drum Tower Hospital, Nanjing 210008, Jiangsu Province, China
  • Received:2024-05-31 Accepted:2024-08-12 Online:2025-09-28 Published:2025-03-05
  • Contact: Li Sen, MD, Chief physician, Department of Spine Surgery, Nanjing Drum Tower Hospital, Nanjing 210008, Jiangsu Province, China
  • About author:Pan Hongyu, Master candidate, Department of Spine Surgery, Hospital of Traditional Chinese Medicine Affiliated to Southwest Medical University, Luzhou 646000, Sichuan Province, China Li Hongtao, Master candidate, Department of Spine Surgery, Hospital of Traditional Chinese Medicine Affiliated to Southwest Medical University, Luzhou 646000, Sichuan Province, China Xiao Changming, MS, Attending physician, Department of Spine Surgery, Hospital of Traditional Chinese Medicine Affiliated to Southwest Medical University, Luzhou 646000, Sichuan Province, China Pan Hongyu, Li Hongtao, and Xiao Changming contributed equally to this article.

Abstract: BACKGROUND: The individualized precise puncture approach is a new approach proposed for vertebral body augmentation in recent years, and has achieved good clinical results, but there is still a lack of relevant biomechanical research.
OBJECTIVE: To investigate the biomechanical effects of individualized precise puncture vertebral augmentation on the vertebral endplate and intervertebral disc of osteoporotic vertebral compression fracture using finite element analysis method. 
METHODS: A total of six preoperative and postoperative models of wedge type, biconcave type, and collapse type were established using the preoperative and postoperative CT imaging data of three osteoporotic vertebral compression fracture patients who had completed individualized precise puncture vertebral augmentation. 500 N moment and 10 N/m rotation moment were loaded in the vertical direction of the vertebral body to simulate the normal physiological activities of the vertebral body, including forward flexion, back extension, left bending, right bending, left rotation, and right rotation, to observe the stress changes of endplates, adjacent endplates, and intervertebral discs of different types of fractured vertebral bodies after individualized precise puncture vertebral augmentation.
RESULTS AND CONCLUSION: (1) Three-dimensional finite element models of preoperative and postoperative spinal functional units were successfully established. (2) After individualized precise puncture vertebral augmentation, the maximum von Mises stress values of wedge-shaped, biconcave, and collapsed fractured vertebral endplates and adjacent vertebral endplates were reduced to a certain extent. The postoperative maximum von Mises stress value increased in the T10 inferior endplate of the superior vertebral body with wedge deformity and the L1 superior endplate of the inferior vertebral body with collapsed deformity. (3) After individualized precise puncture vertebral augmentation, the overall maximum von Mises stress value of adjacent intervertebral discs in the three finite element models decreased. (4) The results show that individualized precise puncture vertebral augmentation can reduce the maximum von Mises stress value of the endplate of wedge-shaped deformity, biconcave deformity and collapsed vertebral body to a certain extent, and diminish the risk of postoperative vertebral body re-fracture. In addition, individualized precise puncture vertebral augmentation decreases the maximum von Mises stress value of the intervertebral disc, which can theoretically alleviate intervertebral disc degeneration to a certain extent.  

Key words: osteoporosis, thoracolumbar vertebral compression fracture, vertebral augmentation, endplate, intervertebral disc, individualized puncture, biomechanics, finite element analysis, orthopedic implants

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