Biomechanical study of tibial avulsion fracture of anterior cruciate ligament with double-headed cannulated compression screw
10.3969/j.issn.1007-1989.2018.02.004
- VernacularTitle:双头空心加压螺钉固定前交叉韧带胫骨止点撕脱骨折的生物力学研究
- Author:
Zhi-Wei ZHANG
1
;
Cheng-Hui YANG
;
Jun-Cai LIU
;
Ren-Ming LI
;
Ming-Liang HE
;
Yong-Chuan YUE
;
Zhong LI
Author Information
1. 四川省自贡市第四人民医院 骨科
- Keywords:
anterior cruciate ligament tibial avulsion fracture;
double-headed cannulated compression screw;
cannulated compression screw;
suture;
biomechanics
- From:
China Journal of Endoscopy
2018;24(2):16-22
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the biomechanical effects of double-headed cannulated compression screws for tibial avulsion fracture of anterior cruciate ligament and the possibility of reducing the risk of intercondylar fossa impingement. Methods Porcine knee joints (30 cases) were taken as experimental samples. Referring to the Meyers classification, it is made into type III fracture. According to the random number table method, they were divided into group A (double-headed cannulated compression screw), group B (cannulated compression screw) and group C (suture), with 10 samples in each group. By detecting the initial displacement and the failure load (peak load and yield load), the nut embedded in the bone block and the failure type were observed to investigate the biomechanical characteristics of the double headed cannulated screw fixation of the fracture. Results The peak load (443.10 ± 8.54) N of group A was not significantly different from that of group C (457.00 ± 26.53) N (P > 0.05), but significantly higher than that of group B (361.70 ± 18.76) N (P < 0.05). The yield load of group A is obviously larger than that of group B (P < 0.05), but it is obviously smaller than the yield load of group C (P < 0.05). The initial displacement of the group A (1.38 ± 0.14) mm was shorter than that of group B and C (1.94 ± 0.12) mm, (3.98 ± 0.19) mm (P < 0.05). The nuts of group A were embedded in the fracture block, and the nuts of group B obviously protruded from the ACL. Conclusions The early biomechanical strength of the anterior cruciate ligament tibial avulsion fracture was significantly better than that of cannulated compression screw and suture, and compared with the cannulated ompression screw, it is difficult to cause intercondylar fossa impingement.
