Biomechanical Study of Novel Articular Process Fixation System Combined with Unilateral Pedicle Screw Fixation
10.16156/j.1004-7220.2021.02.06
- VernacularTitle:新型关节突钉板系统联合单侧椎弓根螺钉固定的生物力学研究
- Author:
Wei MIAO
1
;
Jiandong SHI
1
;
Aiqing LU
1
;
Suchun WANG
1
;
Xia LI
1
;
Zhirong WANG
1
;
Wen ZHANG
2
Author Information
1. Department of Orthopaedics, Zhangjiagang Hospital Affiliated to Nanjing University of Chinese Medicine
2. Institute of Orthopaedics at Soochow University
- Publication Type:Journal Article
- Keywords:
pedicle screw;
articular process;
interbody fusion;
finite element analysis
- From:
Journal of Medical Biomechanics
2021;36(2):E201-E207
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the stability of lumbar spine after transforaminal lumbar interbody fusion (TLIF) surgery combined with a novel articular process fixation system (APFS). Methods Based on the validated finite element model of L3-S1 intact segment (Model A), TLIF surgery was simulated to establish bilateral pedicle screw TLIF model (Model B), right unilateral pedicle screw TLIF model (Model C), APFS combined with right pedicle screw fixation TLIF model (Model D). The range of motion (ROM) of the lumbar spine model and stress distributions on pedicle screws, APFS and interbody fusion cages under different working conditions were observed. Results The overall ROMs of Models B, C, and D under different working conditions were comparable, which were all smaller than those of the physiological model. Compared with Models B and C, the maximum compressive stress of the right pedicle screw and the interbody fusion cage in Model D was the smallest or between Models B and C under different working conditions. Model D had the largest peak stress of APFS and right pedicle screw during anterior flexion. Conclusions APFS combined with contralateral pedicle screw fixation can be used as a novel fixation method for TLIF surgery of lumbar spine.
