磷酸酸蚀预处理和热循环对自酸蚀黏结剂牙釉质黏结效果的影响。

The effect of phosphoric acid pre-etching and thermocycling on self-etching adhesive enamel bonding.

机构信息

Department of Prosthodontics, Creighton University School of Dentistry, Omaha, NE 68178, USA.

出版信息

J Prosthet Dent. 2012 Feb;107(2):102-8. doi: 10.1016/S0022-3913(12)60033-X.

DOI:10.1016/S0022-3913(12)60033-X

PMID:22304744

Abstract

STATEMENT OF PROBLEM

When inserting a resin-bonded prosthesis, it is not known whether pumicing, rinsing, and using a self-etching primer (SE) on prepared surfaces is sufficient or whether the use of an additional conventional acid etchant is warranted due to the increased time and risk of contamination.

PURPOSE

The purpose of this study was to evaluate the effects of pre-etching with phosphoric acid (PA) and thermocycling (TC) on the enamel shear bond strength (SBS) of an autopolymerizing adhesive system on ground enamel.

MATERIAL AND METHODS

Human teeth were embedded in phenolic rings with methyl methacrylate resin, and their enamel surfaces were ground flat to a 600 grit surface. The teeth were then divided into 4 subsets (n=22): 1) PSN, PA pre-etch with SE, no TC; 2) PST, PA pre-etch with self-etching primer and TC; 3) SEN, self-etching primer alone, no TC; and 4) SET, self-etching primer and TC. A multifactorial study design was used to evaluate 2 factors (pre-etching with PA and TC) at 2 levels (presence or absence) by grouping different subsets. Pre-etch consisted of teeth being etched for 30 seconds with PA, rinsed, re-etched, and rinsed. Self-etching consisted of 60 seconds with ED Primer. Rods of Rexillium III, airborne-particle abraded with 50 μm aluminum oxide, were bonded to enamel surfaces with Panavia 21 OP under a 19.6 N load. Thermocycling consisted of alternating between water baths of 5 ± 2°C and 55 ± 2°C for 5000 cycles. Shear bond strength (SBS) was determined by loading the specimens to failure at a crosshead speed of 1 mm/min. Mean values were analyzed with a 2-way ANOVA (factors were surface treatment and TC) at α=.05.

RESULTS

Pre-etching with phosphoric acid showed greater SBS to enamel (P=.028) than the self-etching primer alone. Thermocycling did not have a significant effect (P=.424).

CONCLUSIONS

There was a significant difference in SBS between pre-etching enamel surfaces with phosphoric acid in addition to the self-etching primer and using the self-etching primer exclusively. Thermocycling did not significantly affect SBS.

摘要

问题陈述

在插入树脂粘结修复体时，尚不清楚对预备表面进行喷砂、冲洗和使用自酸蚀底漆（SE）是否足够，或者是否需要使用额外的传统酸蚀剂，因为这会增加时间和污染的风险。

目的

本研究的目的是评估磷酸（PA）预蚀刻和热循环（TC）对自聚合型粘结剂系统在釉质表面的剪切粘结强度（SBS）的影响。

材料和方法

将人牙用甲基丙烯酸甲酯树脂嵌入酚醛环中，将其釉质表面研磨至 600 目。然后将牙齿分为 4 组（n=22）：1）PSN，PA 预蚀刻加 SE，无 TC；2）PST，PA 预蚀刻加自酸蚀底漆和 TC；3）SEN，自酸蚀底漆单独使用，无 TC；和 4）SET，自酸蚀底漆和 TC。采用多因素研究设计，通过分组不同的子集来评估 2 个因素（用 PA 预蚀刻和 TC）的 2 个水平（存在或不存在）。预蚀刻包括用 PA 蚀刻 30 秒，冲洗，再蚀刻，再冲洗。自酸蚀包括用 ED 底漆处理 60 秒。用 Rexillium III 棒，用 50μm 氧化铝进行空气颗粒喷砂处理，在 19.6N 的负载下用 Panavia 21 OP 粘结到釉质表面。热循环包括在 5±2°C 和 55±2°C 的水浴之间交替进行 5000 个循环。以 1mm/min 的十字头速度将试样加载至破坏，测定剪切粘结强度（SBS）。用 2 因素方差分析（因素为表面处理和 TC）分析均值，α=0.05。