Knoop Hardness of Self-Etch Adhesives Applied on Superficial and Deep Dentin.
Knoop Hardness of Self-Etch Adhesives Applied on Superficial and Deep Dentin.
复制标题
DOI：
10.30476/dentjods.2019.77805.0
复制
发表时间：
2020-03-01
期刊：
影响因子：
--
通讯作者：
Khashaei, Shideh
中科院分区：
文献类型：
--
作者：
Firouzmandi, Maryam;Khashaei, Shideh
问题说明：低pH值的自蚀刻粘合剂可能导致聚合不理想。目的：通过努氏硬度试验，评价两种pH值不同的牙本质深度（深层和表层）对自蚀刻胶粘剂聚合效果的影响。材料与方法：用60颗健全磨牙制备浅牙本质和深牙本质标本各30颗。每个深度的牙本质标本随机分为两个相同的亚组（N=15），分别用Adper Prompt L-Pop（强自蚀刻胶）或Adper Easy Bond（轻度自蚀刻胶）粘接。采用努氏硬度试验评价胶粘剂的交联度。数据采用SPSS 16进行分析，采用双因素方差分析比较各研究组硬度平均值（p< 0.05）。结果：牙本质深度与粘接剂类型之间无交互作用（p= 0.36）。无论牙本质深度如何，Adper Easy Bond的硬度均显著高于Adper Prompt L-pop （p< 0.001）。此外，与深层牙本质相比，这两种粘接剂与表层牙本质的粘接度更高（p< 0.001）。结论：弱酸性自蚀刻胶光固化后的交联度大于强酸性自蚀刻胶。两种粘接剂在牙本质表面的硬度均高于深层牙本质。
STATEMENT OF THE PROBLEM: Low pH of self-etch adhesives might cause suboptimal polymerization.PURPOSE: This study aimed to evaluate the effect of dentin depth (deep and superficial) on polymerization efficacy of two self-etch adhesives, with different pH by means of Knoop hardness test.MATERIALS AND METHOD: In this in vitro study, sixty sound molars were used to prepare 30 superficial dentin and 30 deep dentin specimens. Dentin specimens of each depth were randomly distributed into two equal subgroups (N=15) and bonded by either Adper Prompt L-Pop (strong self-etch adhesive) or Adper Easy Bond (mild self-etch adhesive). Knoop hardness test was employed to evaluate degree of cross-linking of the adhesives. Data were analyzed with SPSS 16, using two-way ANOVA to compare mean hardness values of the study groups (p< 0.05).RESULTS: There was no interaction effect between dentin depth and the type of adhesive (p= 0.36). Regardless of dentin depth, hardness of Adper Easy Bond was significantly higher than that of Adper Prompt L-pop (p< 0.001). Moreover, both the adhesives showed higher hardness when bonded to superficial dentin compared to deep dentin (p< 0.001).CONCLUSION: Degree of cross-linking of the self-etch adhesive with mild acidity was more than that of the strong self-etch adhesive after light-curing. Surface hardness of both adhesives was higher on superficial dentin compared to deep dentin.