[Establishment of traumatic occlusion model in Sprague-Dawley rats].
OBJECTIVE
In this study, different methods were used to observe and obtain the most effective one to establish occlusal trauma model in Sprague-Dawley rats.


METHODS
SPF male SD rats weighing 150~200 g and aged 10 to 12 weeks were used in this study. The rats' maxillary molars were bonded with stainless steel wire, resin , casting half crown , casting half combined crowns, half crown using selective laser melting (SLM) technology, half combined crowns using SLM technology through Super-bond and Multi-link bonding under general anesthesia. After bonding, the experimental device expulsion rates were observed daily. The data was analyzed statistically using Fisher's exact test with SAS 8.2 software package.


RESULTS
There was no significant difference between the falling rates of using super-bond and using multi-link. Under the situation in which different bonding methods exerted no influence on the falling rates, there was significant difference between different experimental devices (P<0.0001).


CONCLUSIONS
The restorations fabricated with SLM technology is valid and feasible to induce occlusal point in building occlusal trama model using SD rats.
Department of Prosthodontics,Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China. E-mail:185819248@qq.com.
Xian-Zhen
XZ
Xin
Xu
X
Yang
Bin
B
Wei
D000818:Animals; D001896:Boron Compounds; D003442:Crowns; D003766:Dental Occlusion; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D023421:Models, Animal; D051381:Rats; D017207:Rats, Sprague-Dawley; D019279:Resin Cements; D013193:Stainless Steel
D001896:Boron Compounds; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D013193:Stainless Steel; C049495:Super-bond