Comparison of fixation strength of the locking and non-locking anterior cervical plate systems
- VernacularTitle:颈椎前路带锁与非带锁钢板螺钉系统固定强度的比较
- Author:
Deyu CHEN
;
Qiang SHEN
;
Dianwen SONG
- Publication Type:Journal Article
- Keywords:
cervical vertebrae;
plate;
screw;
fixation strength
- From:
Academic Journal of Second Military Medical University
2000;21(7):610-614
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To compare the prompt fixation strength and antifatigue strength of the locking and non-locking anterior cervical plating systems. Methods:AO Cervical Spine Locking Plate (CSLP), Danek Orion plate and AcroMed Acroplate were used on the lamb cervical spines. The CSLP and Orion were tested with screws locked and unlocked, and the Acroplate with unicortical and bicortical purchase. The fixation strength and pull-off strength of the screw-plate constructs were performed initially and after fatigue. Results: Locked CSLP and Orion constructs were more rigid than all unlocked unicortical systems initially and after cyclic loading. After fatigue testing, the strength of all unlocked constructs decreased significantly. There was no significant difference in pull-off strength between the CSLP, the Orion and the unicortical Acroplate. Conclusion: The locking mechanism significantly increases the prompt fixation strength and antifatigue strength of the tested screw-plate systems.
