华西口腔医学杂志2011，Vol.29Issue(5)：497-500,4.DOI:10.3969/j.issn.1000-1182.2011.05.012
2种根管封闭剂对2种纤维桩剪切粘接强度的影响
Effects of two endodontic sealers on the bond strength of two fiber posts
韩光政 1熊正慧 2陈亚明2
作者信息
- 1. 苏州口腔医院修复科,苏州215005
- 2. 南京医科大学附属口腔医院 综合诊疗科,南京210029
- 折叠
摘要
Abstract
Objective To study the effects of two different endodontic sealers on the bond strength of two fiber posts cemented with adhesive resin cement. Methods Twenty-eight crownless human maxillary central incisors were prepared with the step-back technique and randomly divided into four groups according endodontic sealer and fiber Group A, Cortisomol sealer+Matchpost fiber post; Group B, Cortisomol sealer+Macrolock fiber post; Group C, dataflow sealer+Matchpost fiber post; Group D, Guttaflow sealer+Macrolock fiber post. One week after fiber posts were bonded, a thin-slice push-out test was performed in a universal machine. Morphologic structure of the root canal dentin surfaces etched and the adhesive interfaces were examined by scanning electron microscopy (SEND. Results The bond strengths of 4 groups were (7.06±3.22), (9.31±3.60, (6.90±3.13), (9.71±3.42) Mpa. The bond strengths of group B and D were significantly higher than that of group A and C (P<0.05). There was no significant difference between group A and C, group B and D (P>0.05). The cervical third had the highest mean push-out bond strength, next to middle third and apical third (P<0.01). SEM showed that larger numbers of the dentin tubules were open after the root canals were etched and penetration of resin tags into the dentinal tubules increased in the coronal root region when compared with the apical root region. Conclusion The shear bond strength doesn't have relationship with endodontic sealers. The serration significantly increases the retention of fiber post. The bond strengths are different at the three root segment sites.关键词
纤维桩/根管封闭剂/粘接强度Key words
fiber post/ endodontic sealer/ bond strength分类
医药卫生引用本文复制引用
韩光政,熊正慧,陈亚明..2种根管封闭剂对2种纤维桩剪切粘接强度的影响[J].华西口腔医学杂志,2011,29(5):497-500,4.
