在实验室载荷下评估不同窝沟封闭剂的边缘适应性、密封性及抗疲劳裂纹性能。

Evaluation of marginal adaptation, seal and resistance against fatigue cracks of different pit and fissure sealants under laboratory load.

作者信息

Rodriguez Tapia Maria Teresa, Ardu Stefano, Daeniker Laurent, Krejci Ivo

机构信息

Division of Cariology and Endodontology, School of Dentistry, University of Geneva 19, Rue Barthélemy-Menn, 1205 Geneva, Switzerland.

出版信息

Am J Dent. 2011 Dec;24(6):367-71.

PMID:22263335

Abstract

PURPOSE

To evaluate, in the laboratory, five light-cured pit and fissure sealants (ClinPro Sealant, Grandio Seal, Delton Seal-N-Go Illuminating, Embrace WetBond, Delton LC) and a filled bonding resin (Optibond FL Adhesive) used as a sealant in respect to their marginal adaptation before and after simultaneous thermal cycling and occlusal loading and their seal and failure cracks after loading.

METHODS

60 caries-free upper molars were mechanically and thermally loaded after sealant application. Marginal adaptation was evaluated in the SEM before and after loading and a dye penetration test was performed after loading. In addition, micro-morphology of the occlusal contact area was qualitatively assessed.

RESULTS

Percentages of "continuous margin" ranged from 97.5 to 72.3% before, and from 92.2 to 56.6% after loading. Loading significantly influenced marginal quality (ANOVA, P < 0.05). Dye penetration after loading ranged from 0.05 to 1.21, with significant differences between groups (Kruskal-Wallis, P < 0.05). Different degrees of disintegration were observed in the occlusal contact area of all materials after loading.

摘要

目的

在实验室中评估五种光固化窝沟封闭剂（ClinPro封闭剂、Grandio封闭剂、Delton Seal - N - Go照明型、Embrace WetBond、Delton LC）以及一种用作封闭剂的填充粘结树脂（Optibond FL粘结剂）在同时进行热循环和咬合加载前后的边缘适应性，以及加载后的封闭和失效裂纹情况。

方法

60颗无龋的上颌磨牙在应用封闭剂后进行机械和热加载。在加载前后通过扫描电子显微镜评估边缘适应性，并在加载后进行染料渗透测试。此外，对咬合接触区域的微观形态进行定性评估。

结果

加载前“连续边缘”的百分比范围为97.5%至72.3%，加载后为92.2%至56.6%。加载显著影响边缘质量（方差分析，P < 0.05）。加载后的染料渗透范围为0.05至1.21，各组间存在显著差异（Kruskal - Wallis检验，P < 0.05）。加载后在所有材料的咬合接触区域均观察到不同程度的崩解。