不同衬层对复合体与乳牙牙本质粘结强度的影响：体外研究

The effect of different liners on the bond strength of a compomer to primary teeth dentine: in vitro study.

作者信息

Frankenberger R, Nassiri S, Lücker S, Lygidakis N N, Krämer N

机构信息

Department of Operative Dentistry and Endodontics, Dental School, University of Marburg and University Medical Center Giessen and Marburg, Campus Marburg, Georg-Voigt-Str. 3, 35039, Marburg, Germany.

Department of Pediatric Dentistry, Dental School, University of Marburg and University Medical Center Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392, Giessen, Germany.

出版信息

Eur Arch Paediatr Dent. 2021 Aug;22(4):643-649. doi: 10.1007/s40368-020-00601-2. Epub 2021 Feb 3.

DOI:10.1007/s40368-020-00601-2

PMID:33537902

Abstract

OBJECTIVE

This in vitro investigation should identify the effect of protective liners on dentine bond strength of a polyacid modified resin composite to dentine of primary teeth.

METHODS

Forty-two extracted caries-free primary molars were randomly assigned to seven groups (n = 6) and flattened. Six test groups were centrally covered with different protective liners/base materials: Kerr Life (KL), IRM zinc oxide eugenol cement (IRM), Ketac Bond (KB), Vitrebond (VB), Dycal (DY), and mineral trioxide aggregate (MTA). Specimens were bonded with Prime&Bond NT (PB) and restored with Dyract eXtra. The control group (C) did not receive liner pretreatment. After 24-h storage in Aqua dest. (37 °C), specimens were cut and regional microtensile bond strengths of the uncovered areas were tested. Fractography was conducted under a light microscope and further interface/surface analyses were performed under a SEM. Statistical appraisal was carried out using oneway ANOVA (mod. LSD test; p < 0.05).

RESULTS

Independent of the distance to the applied liner, all groups exhibited inferior μ-TBS to dentine of primary teeth compared to the control group (p < 0.05). The results were as follows in MPa(SD) :significance level/percentage of adhesive fractures: PB: 34 (10)/72%; KL: 23 (25)/64%; KB: 15 (12)/76%; DY 15 (13)/55%; IRM: 14 (10)/68%; VB: 12 (10)/61%; MTA 12 (10)/69%.

CONCLUSIONS

Protective liners significantly reduced μ-TBS to dentine of primary teeth.

摘要

目的

本体外研究旨在确定保护衬层对聚酸改性树脂复合材料与乳牙牙本质粘结强度的影响。

方法

将42颗拔除的无龋乳牙随机分为7组（n = 6）并磨平。六个试验组在中央覆盖不同的保护衬层/基底材料：Kerr Life（KL）、IRM氧化锌丁香酚水门汀（IRM）、Ketac Bond（KB）、Vitrebond（VB）、Dycal（DY）和三氧化矿物凝聚体（MTA）。用Prime&Bond NT（PB）粘结标本，并用Dyract eXtra修复。对照组（C）未进行衬层预处理。在去离子水中（37℃）储存24小时后，将标本切割，测试未覆盖区域的区域微拉伸粘结强度。在光学显微镜下进行断口分析，并在扫描电子显微镜下进行进一步的界面/表面分析。使用单向方差分析（修正的最小显著差异检验；p < 0.05）进行统计学评估。

结果

与对照组相比，所有组与乳牙牙本质的微拉伸粘结强度均较低，且与所施加衬层的距离无关（p < 0.05）。结果如下（MPa[标准差]）：显著性水平/粘结剂断裂百分比：PB：34（10）/72%；KL：23（25）/64%；KB：15（12）/76%；DY 15（13）/55%；IRM：14（10）/68%；VB：12（10）/61%；MTA 12（10）/69%。