黏合温度：对黏合性能和树脂-牙本质黏结强度的影响。

Adhesive temperature: effects on adhesive properties and resin-dentin bond strength.

机构信息

University Estadual de Ponta Grossa, Restorative Dentisty, Ponta Grossa, Brazil.

出版信息

Oper Dent. 2011 May-Jun;36(3):293-303. doi: 10.2341/10-218L.

DOI:10.2341/10-218L

PMID:21851256

Abstract

OBJECTIVES

To evaluate the effect of adhesive temperature on the resin-dentin bond strength (μTBS), nanoleakage (NL), adhesive layer thickness (AL), and degree of conversion (DC) of ethanol/water- (SB) and acetone-based (PB) etch-and-rinse adhesive systems.

METHODS

The bottles of the two adhesives were kept at each temperature (5°C, 20°C, 37°C, and 50°C) for 2 hours before application to demineralized dentin surfaces of 40 molars. Specimens were prepared for μTBS testing. Bonded sticks (0.8 mm(2)) were tested under tension (0.5 mm/min). Three bonded sticks from each tooth were immersed in silver nitrate and analyzed by scanning electron microscopy. The DC of the adhesives was evaluated by Fourier transformed infrared spectroscopy.

RESULTS

Lower μTBS was observed for PB at 50°C. For SB, the μTBS values were similar for all temperatures. DC was higher at 50°C for PB. Higher NL and thicker AL were observed for both adhesives in the 5°C and 20°C groups compared to the 37°C and 50°C groups. The higher temperatures (37°C or 50°C) reduced the number of pores within the adhesive layer of both adhesive systems.

CONCLUSIONS

It could be useful to use an ethanol/water-based adhesive at 37°C or 50°C and an acetone-based adhesive at 37°C to improve adhesive performance.

摘要

目的

评估黏结温度对乙醇/水基（SB）和丙酮基（PB）酸蚀-冲洗型黏结剂的树脂-牙本质黏结强度（μTBS）、纳米渗漏（NL）、黏结层厚度（AL）和转化率（DC）的影响。

方法

在应用于 40 颗磨牙脱矿牙本质表面之前，将两种黏合剂的瓶子在每个温度（5°C、20°C、37°C 和 50°C）下放置 2 小时。为 μTBS 测试制备标本。将黏结棒（0.8mm²）在张力下（0.5mm/min）进行测试。从每颗牙齿的三个黏结棒中取出三个，浸入硝酸银中，通过扫描电子显微镜进行分析。通过傅里叶变换红外光谱评估黏合剂的 DC。

结果

在 50°C 时，观察到 PB 的 μTBS 较低。对于 SB，所有温度的 μTBS 值相似。对于 PB，50°C 时 DC 较高。与 37°C 和 50°C 组相比，两种黏合剂在 5°C 和 20°C 组中观察到更高的 NL 和更厚的 AL。较高的温度（37°C 或 50°C）减少了两种黏合剂体系黏结层内的孔隙数量。