中国组织工程研究2012，Vol.16Issue(29)：5366-5370,5.DOI:10.3969/j.issn.2095-4344.2012.29.010
桩道及桩核不同时间差预备对根充材料封闭根方微渗漏的影响
Effects of post space and post core preparation at different time on apical microleakage with fiber post sealing
肖月 1于佳 1王健平 1郭海1
作者信息
- 1. 佳木斯大学口腔医学院,黑龙江省佳木斯市,154002
- 折叠
摘要
Abstract
BACKGROUND: The vibration of high speed turbine handpiece during post space and post core preparation has an adverse effect on the continuous force of the bonding interfaces among the cement, dentin and post core, which influences the apical sealing effect of post core.
OBJECTIVE: To investigate the effects of post space and post core preparation at different time on apical microleakage with fiber posts system.
METHODS: Totally 55 extracted mandibular premolars each with single root canal were biomechanically prepared by using the step back technique. The samples were divided into five groups randomly: the immediate post space preparation group, 2 days after post space preparation group, 1 week after post space preparation group, a positive control group and a negative control group. Each group was averagely divided into three subgroups and they all were mixed for 15, 30 and 60 minutes on the cements, and then performed post core preparation. After that, all roots were dyed and transparentized. The dyeing scores of apical microleakage in each group were recorded under stereoscopic microscope observation.
RESULTS AND CONCLUSION: The score of apical microleakage in 1 week after post space preparation group was obviously higher than that in 2 days after post space preparation group. There were significant differences between the two groups (P < 0.05). No significant difference was shown for the microleakage of post core preparation after mixed for 15, 30 and 60 minutes on the cements (P > 0.05). These findings suggest that the immediate post space preparation can play a good protective effect on apical sealing. In terms of fiber posts, there are not effects of post core preparation at different time on apical microleakage after the same kind of cement solidified completely.关键词
桩道预备/桩核预备/纤维桩/根方微渗漏/牙/生物材料分类
医药卫生引用本文复制引用
肖月,于佳,王健平,郭海..桩道及桩核不同时间差预备对根充材料封闭根方微渗漏的影响[J].中国组织工程研究,2012,16(29):5366-5370,5.
