上海交通大学学报（医学版）

上海交通大学学报（医学版） ›› 2017, Vol. 37 ›› Issue (8): 1106-.doi: 10.3969/j.issn.1674-8115.2017.08.011

• 论著（临床研究） • 上一篇    下一篇

可塑纤维桩对氢氧化钙作用后年轻恒牙抗折性能的影响#br#

付梦辰，杨茜，王慧慧，李成皓，赵玉梅   

  1. 同济大学 口腔医学院附属口腔医院儿童口腔科，上海牙组织修复与再生工程技术研究中心，上海  200072
  • 出版日期:2017-08-28 发布日期:2017-09-28
  • 通讯作者: 赵玉梅，电子信箱 : yumeizhao@tongji.edu.cn
  • 作者简介:付梦辰 (1988—)，女，主治医师，硕士；电子信箱：fmc_fmc@126.com
  • 基金资助:
    上海市科学技术委员会科研计划项目（14411963600）

Effects of custom made fiber posts on the fracture resistance of young permanent teeth treated with calcium hydroxide#br#

FU Meng-chen, YANG Xi, WANG Hui-hui, LI Cheng-hao, ZHAO Yu-mei   

  1. Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Department of Pediatric Dentistry, School & Hospital of Stomatology, Tongji University, Shanghai 200072, China
  • Online:2017-08-28 Published:2017-09-28
  • Supported by:
    Project of Shanghai Science and Technology Committee, 14411963600

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摘要： 目的 · 观察可塑纤维桩对氢氧化钙作用不同时间后年轻恒牙抗折性能的影响。方法 · 选取离体年轻恒前磨牙 45 颗，随机分为 9 组。1 组为空白对照组； 8 组经根管预备，其中 4 组（FⅠ、FⅢ、FⅥ、FⅨ）分别在氢氧化钙水糊剂作用 1、3、6、9 个月后行根管充填 并置入可塑纤维桩修复，4 组（CⅠ、CⅢ、CⅥ、CⅨ）不置入可塑纤维桩。所有样本进行断裂载荷测定并分析其折裂模式是否具有二次 修复性。结果 · 氢氧化钙作用 1 个月后，断裂载荷值随着氢氧化钙作用时长的增加而逐渐降低（P<0.01）；氢氧化钙作用 6 个月及 9 个月后，置入可塑纤维桩组断裂载荷值均有所增高（P<0.05，P<0.01）。氢氧化钙作用 1 个月后，与未置入可塑纤维桩组相比，置入 可塑纤维桩组更易出现利于二次修复的折裂模式（P<0.05）。 结论 · 当氢氧化钙需中长期（≥ 1 个月）作用于年轻恒牙时，置入可塑 纤维桩可提高牙根的抗折性能。

关键词: 可塑纤维桩, 氢氧化钙, 年轻恒牙, 抗折性能

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 (FⅠ, FⅢ, FⅥ, 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 (CⅠ, CⅢ, CⅥ, CⅨ) 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).

Key words: custom made fiber post, calcium hydroxide, young permanent teeth, fracture resistance