关键词: Aging Carbodiimide Dentin bonding agent Shear strength

Mesh : Humans Carbodiimides / chemistry Resin Cements / chemistry Shear Strength Materials Testing Dentin Microscopy, Electron, Scanning Dentin-Bonding Agents / chemistry Dental Stress Analysis Cross-Linking Reagents / chemistry Dental Bonding / methods In Vitro Techniques Acid Etching, Dental / methods Molar, Third Temperature Time Factors Surface Properties

来  源:   DOI:10.1186/s12903-024-04415-2   PDF(Pubmed)

Abstract:
BACKGROUND: This study investigated the effect of carbodiimide (EDC) combined with Clearfil SE self-etch adhesive on the shear bond strength (SBS), crosslinking degree, denaturation temperature, and enzyme activity of dentin in vitro.
METHODS: Collected human sound third molars were randomly divided into different groups with or without EDC treatment (0.01-1 M). The specimens (n = 16)were stored for 24 h (immediate) or 12 months (aging) before testing the SBS. Fine dentin powder was obtained and treated with the same solutions. Then the crosslinking degree, denaturation temperature (Td), and enzyme activity were tested. Statistical analysis was performed using a one-way analysis of variance (ANOVA) to compare the differences of data between groups (α = 0.05).
RESULTS: There was a significant drop in immediate SBS and more adhesive fracture of 1.0 M EDC group, while there were no significant differences among the other groups. SEM showed a homogeneous interface under all treatments. After 12 months of aging, the SBS significantly decreased. Less decreases of SBS in the 0.3 and 0.5 M groups were found. Due to thermal and enzymatical properties consideration, the 0.3 and 0.5 M treatments also showed higher cross-link degree and Td with lower enzyme activity.
CONCLUSIONS: 0.3 and 0.5 M EDC may be favorable for delaying the aging of self-etch bond strength for 12 months. But it is still needed thoroughly study.
摘要:
背景:这项研究调查了碳化二亚胺(EDC)与ClearfilSE自蚀刻粘合剂结合对剪切粘合强度(SBS)的影响,交联度,变性温度,牙本质的体外酶活性。
方法:将收集的人声第三磨牙随机分为不同的组,有或没有EDC治疗(0.01-1M)。在测试SBS之前,将样品(n=16)储存24小时(立即)或12个月(老化)。获得细牙本质粉末并用相同的溶液处理。然后交联度,变性温度(Td),和酶活性进行了测试。使用单向方差分析(ANOVA)进行统计分析,以比较组间数据的差异(α=0.05)。
结果:1.0MEDC组的即刻SBS明显下降,粘连性骨折更多,而其他组之间没有显着差异。SEM显示在所有处理下的均匀界面。经过12个月的老化,SBS显著下降。在0.3和0.5M组中发现SBS的减少较少。由于热和酶学性质的考虑,0.3和0.5M处理也显示出较高的交联度和Td,酶活性较低。
结论:0.3和0.5MEDC可能有利于将自蚀刻粘结强度的老化延迟12个月。但仍需深入研究。
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