摘要
目的 分析牙本质粘接界面染料渗透与扫描电子显微镜微隙观察结果之间的相关性。 方法 采用空气喷磨技术 (KCP-1000)和金刚砂车针在18颗离体人牙上制备54个Ⅴ类洞 ,然后分别采用ClearfilLinerBond2、ResulcinAquaPrime+MonoBond粘结剂和ClearfilAP-X、MerzFHC、Liquicoat复合树脂修复填充。0.5%亚甲基蓝溶液染色后沿长轴切开牙齿 ,放大25倍评估染色等级 ,扫描电子显微镜观察环氧树脂复制模检测界面裂隙。结果98.1%牙本质粘接界面存在染料渗透现象 ,85.2 %牙本质粘接界面扫描电子显微镜观察有微隙存在。扫描电子显微镜观察微隙程度与染料渗透程度不一致者占51.9% ,但两种观察结果高度相关(r=0.642 ,P<0.01)。 结论牙本质粘接界面的染料渗透与扫描电子显微镜观察结果之间具有相关性。
Objective To determine the relationship between penetration and microgap of restoration-tooth interface. Methods A total 54 ClassⅤ cavities prepared either with diamond burs or air abrasion (KCP 1000) were restored with resin composites using adhesive systems with self-etching priming agents (Clearfil Liner Bond 2 or Resulcin AquaPrime+Monobond). The degree of dye penetration (0.5% methylene blue solution) was scored on an ordinal scale at 25X magnification on longitudinally cut sections of the specimens. Wall adaptation at the tooth-restoration interfaces was evaluated under scan electron microscopy(SEM) using replicas of the sectioned teeth.Results Severe microleakage occurred at the gingival dentinal margins. There was no significant difference (P>0.05) in microleakage among the different groups. Comparison of dye penetration data and SEM findings showed that the micro-gaps were not exactly consistent with the dye penetration, but a significant correlation (r=0.642,P=0.000) existed between two methods.Conclusion The findings indicate that there is a significant relationship between penetration and microgap of restoration-dentin interface, although they were not completely identical.
出处
《浙江医学》
CAS
2003年第2期82-84,共3页
Zhejiang Medical Journal