Effects of custom made fiber posts on the fracture resistance of young permanent teeth treated with calcium hydroxide
10.3969/j.issn.1674-8115.2017.08.011
- VernacularTitle:可塑纤维桩对氢氧化钙作用后年轻恒牙抗折性能的影响
- Author:
Mengchen FU
;
Xi YANG
;
Huihui WANG
;
Chenghao LI
;
Yumei ZHAO
- Keywords:
custom made fiber post;
calcium hydroxide;
young permanent teeth;
fracture resistance
- From:
Journal of Shanghai Jiaotong University(Medical Science)
2017;37(8):1106-1110
- CountryChina
- Language:Chinese
-
Abstract:
Objective · To observe the effects of custom made fiber posts on the fracture resistance of young permanent teeth treated with calcium hydroxide for different time. Methods · Forty-five extracted human young permanent teeth (premolar) were selected and randomly assigned to 9 groups.One group was the control group and the rest 8 groups were treated with conventional root canal preparation. Of these 8 groups, 4 groups (F Ⅰ , F Ⅲ , F Ⅵ ,FⅨ ) were restored by custom made fiber posts after being treated with calcium hydroxide for 1, 3, 6, and 9 months respectively, and other 4 groups (C Ⅰ ,CⅢ , C Ⅵ , C Ⅸ ) were not restored by custom made fiber posts. All samples underwent fracture strength tests and their fracture modes were analyzed for the possibility of second repair. Results · The fracture load was decreased with the treatment time after being treated with calcium hydroxide for 1 month (P<0.01). The fracture loads in groups restored by custom made fiber posts were increased after being treated with calcium hydroxide for 6 and 9 months (P<0.05, P<0.01). After being treated with calcium hydroxide for 1 month, groups restored by custom made fiber posts were likely to have fracture modes that facilitate the second repair as compared with groups not restored by custom made fiber posts (P<0.05). Conclusion · The restoration by custom made fiber posts can increase the fracture resistance of young permanent teeth treated with calcium hydroxide for medium and long term ( ≥ 1 month).
