固化模式会影响粘结式复合CAD/CAM修复体与牙本质之间的粘结强度。

Curing mode affects bond strength of adhesively luted composite CAD/CAM restorations to dentin.

作者信息

Lührs Anne-Katrin, Pongprueksa Pong, De Munck Jan, Geurtsen Werner, Van Meerbeek Bart

机构信息

KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Germany.

KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium.

出版信息

Dent Mater. 2014 Mar;30(3):281-91. doi: 10.1016/j.dental.2013.11.016. Epub 2014 Jan 11.

DOI:10.1016/j.dental.2013.11.016

PMID:24424092

Abstract

OBJECTIVES

To determine the effect of curing mode and restoration-surface pre-treatment on the micro-tensile bond strength (μTBS) to dentin.

METHODS

Sandblasted CAD/CAM composite blocks (LAVA Ultimate, 3M ESPE) were cemented to bur-cut dentin using either the etch & rinse composite cement Nexus 3 ('NX3', Kerr) with Optibond XTR ('XTR', Kerr), or the self-etch composite cement RelyX Ultimate ('RXU', 3M ESPE) with Scotchbond Universal ('SBU', 3M ESPE). All experimental groups included different 'curing modes' (light-curing of adhesive and cement ('LL'), light-curing of adhesive and auto-cure of cement ('LA'), co-cure of adhesive through light-curing of cement ('AL'), or complete auto-cure ('AA')) and different 'restoration-surface pre-treatments' of the composite block (NX3: either a silane primer (Kerr), or the XTR adhesive; RXU: either silane primer (RelyX Ceramic Primer, 3M ESPE) and SBU, or solely SBU). After water-storage (7 days, 37°C), the μTBS was measured. Additionally, the degree of conversion (DC) of both cements was measured after 10min and after 1 week, either auto-cured (21°C/37°C) or light-cured (directly/through 3-mm CAD/CAM composite).

RESULTS

The linear mixed-effects model (α=0.05) revealed a significant influence of the factors 'curing mode' and 'composite cement', and a less significant effect of the factor 'restoration-surface pre-treatment'. Light-curing 'LL' revealed the highest μTBS, which decreased significantly for all other curing modes. For curing modes 'AA' and 'AL', the lowest μTBS and a high percentage of pre-testing failures were reported. Overall, DC increased with light-curing and incubation time.

SIGNIFICANCE

The curing mode is decisive for the bonding effectiveness of adhesively luted composite CAD/CAM restorations to dentin.

摘要

目的

确定固化模式和修复体表面预处理对牙本质微拉伸粘结强度（μTBS）的影响。

方法

使用蚀刻冲洗复合树脂粘结剂Nexus 3（“NX3”， Kerr公司）与Optibond XTR（“XTR”， Kerr公司），或自酸蚀复合树脂粘结剂RelyX Ultimate（“RXU”， 3M ESPE公司）与Scotchbond Universal（“SBU”， 3M ESPE公司），将喷砂处理的CAD/CAM复合树脂块（LAVA Ultimate， 3M ESPE公司）粘结到用牙钻切割的牙本质上。所有实验组包括不同的“固化模式”（粘结剂和粘结剂光固化（“LL”）、粘结剂光固化和粘结剂自固化（“LA”）、通过粘结剂光固化实现粘结剂共固化（“AL”）或完全自固化（“AA”））以及复合树脂块不同的“修复体表面预处理”（NX3：硅烷底漆（Kerr公司）或XTR粘结剂；RXU：硅烷底漆（RelyX Ceramic Primer， 3M ESPE公司）和SBU，或仅使用SBU）。在37℃下储存7天后，测量μTBS。此外，在自固化（21℃/37℃）或光固化（直接/通过3毫米CAD/CAM复合树脂）10分钟和1周后，测量两种粘结剂的转化率（DC）。

结果

线性混合效应模型（α = 0.05）显示“固化模式”和“复合树脂粘结剂”因素有显著影响，“修复体表面预处理”因素影响较小。光固化“LL”显示出最高的μTBS，所有其他固化模式下该值均显著降低。对于固化模式“AA”和“AL”，报告的μTBS最低且预测试失败率很高。总体而言，DC随光固化和孵育时间增加。