节点文献

根管预备程度对中国人牙根强度的影响

The effect of root canal instrumentation on Chinese tooth root strength

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 王轲许可耿楠李谨

【Author】 WANG Ke;XU Ke;GENG Nan;LI Jin;Jiangsu Key Laboratory of Oral Diseases,V.I.P.Department,Stomatological Hospital Affiliated to Nanjing Medical University;

【机构】 南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院特诊科

【摘要】 目的探讨根管预备程度对中国人牙齿力学性能的影响。方法选取中国成人离体单根管下颌前磨牙40颗,随机分为A、B、C、D 4组,分别预备至0.04锥度#25、0.06锥度#25、0.04锥度#30、0.06锥度#30,全部常规侧方加压充填根管。置于万能力学实验机加压,记录牙根折裂时最大载荷。结果 A组(182.17±49.22)N与B组(146.28±56.54)N、C组(98.14±12.25)N与D组(86.10±29.44)N无统计学差异(P>0.05),A组与C组、B组与D组有统计学差异(P<0.05)。结论根管预备时锥度和号数增加均会引起牙根强度的降低,但号数的变化对牙根强度影响更大。

【Abstract】 Objective To discuss the effect of root canal instrumentation on mechanical characters of Chinese tooth root. Methods A total of 40 mandibular premolars with single canal extracted from Chinese adults were randomly divided into 4 groups( A,B,C,D),which were all prepared by rotary instruments up to #25 0. 04 taper,#25 0. 06 taper,#30 0. 04 taper and #30 0. 06 taper. All specimens were filled with gutta percha and AH-Plus sealer with lateral condensation filling technology. The specimens were then submitted to compressive strength testing by a universal testing machine. The highest compressive strength value was recorded when each root exhibited vertical fracture. Results No significant differences were obtained either between Group A( 182. 17 ± 49. 22) N and Group B( 146. 28 ± 56. 54) N or between Group C( 98. 14 ± 12. 25) N and Group D( 86. 10 ± 29. 44) N( P > 0. 05). However,there were significant differences between Group A and Group C as well as Group B and Group D( P < 0. 05). Conclusions Increased taper and size of file tip of root canal instrumentation could lead to decreased root strength,and the size of file tip exhibited more influences.

【关键词】 根管预备锥度号数折裂
【Key words】 root canal instrumentationtapersizefracture
【基金】 江苏省卫生厅科研课题资助项目(H201433);江苏省高校优势学科资助项目(2014-37)
  • 【分类号】R781.05
  • 【被引频次】4
  • 【下载频次】107
节点文献中: 

本文链接的文献网络图示:

本文的引文网络