Open AccessBiomechanical analysis and optimization of screw fixation technique for the cortical bone channel of lower thorax
Author(s) -
Yang Yu,
Yizhou Xie,
Qiang Jian,
Shan Yin,
Guilong Zhang,
Xiaohong Fan
Publication year - 2020
Publication title -
medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.59
H-Index - 148
eISSN - 1536-5964
pISSN - 0025-7974
DOI - 10.1097/md.0000000000019046
Subject(s) - medicine , thoracic vertebrae , lumbar vertebrae , fixation (population genetics) , lumbar , thorax (insect anatomy) , vertebra , biomechanics , thoracic spine , orthodontics , anatomy , osteoporosis , population , environmental health , endocrinology
It is well known that the main segments of spinal fracture is thoracolumbar (T11-L11). Therefore, in addition to the lumbar, the lower thoracic vertebra (T9-T12) often has the clinical needs of implantation of cortical bone trajectory (CBT) screws. However, the anatomic parameters of the lower thoracic vertebrae are quite different from those of the lumbar vertebrae, which means that if CBT screws are to be implanted in the lower thoracic vertebrae, the selection of the screw entry point, the length, diameter, angle and path of the screws in each segment need to be redefined. Methods In this part, 3-dimensional finite element model was established to analyze the stress and fixation efficiency of CBT screws in thoracic vertebrae after 5000 times of fatigue loading of normal model and osteoporosis model. Discussion If the outcomes indicate the trial is feasible and there is evidence to provide some basic anatomical parameters for CBT screw implantation in the lower thoracic spine, so that the ideal insertion point, length, diameter, and angle of CBT screw in different segments of the lower thoracic spine were determined. Trial Registration Chinese Clinical Trial Registry, ChiCTR1900026915.Registered on September 26, 2019.