处理后牙本质-树脂界面的形态。

Resin-dentine interfacial morphology following CPP-ACP treatment.

机构信息

Melbourne Dental School, University of Melbourne, 720 Swanston Street, Victoria 3010, Australia.

出版信息

J Dent. 2010 Feb;38(2):96-105. doi: 10.1016/j.jdent.2009.09.007. Epub 2009 Sep 23.

DOI:10.1016/j.jdent.2009.09.007

PMID:19781591

Abstract

OBJECTIVES

To evaluate the quality of bonded resin-dentine interfaces produced by two self-etching primer adhesives after casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) treatment, in comparison to untreated dentine.

METHODS

Thirty-four adult molar teeth were sectioned to obtain dentine with tubule orientations parallel/oblique or perpendicular to the surface. The specimens were divided into 'smear layer' (1A, 1B) and 'no smear layer' groups, after treatment with 15% EDTA (2A, 2B). The specimens were then left either untreated (1A, 2A) or treated (1B, 2B) with CPP-ACP paste (Tooth Mousse, GC Corp.) for 60 min x 7 days. Each treatment group was divided into three subgroups and specimens etched/conditioned (no conditioning; 30-40% phosphoric acid (H(3)PO(4)); 20% polyacrylic acid) and bonded with either a 2-step self-etching primer adhesive (Clearfil SE Bond, Kuraray Medical) or an 'all-in-one' adhesive (G-Bond, GC Corp.) and a hybrid resin composite. After 24-h water storage, the bonded specimens were sectioned, polished up to 4000-grit abrasive silicon carbide paper and 0.25-microm diamond paste, prepared for FE-SEM using the acid-base technique, critical point-dried, gold-coated and examined. Bonded and fractured dentine interfaces were also prepared and examined.

RESULTS

The 2-step adhesive produced a similar appearance of bonded resin-dentine interface irrespective of smear layer group, treatment or etching/conditioning. After polyacrylic acid conditioning, the 'all-in-one' adhesive exhibited more areas with bond failures. The bond failures were within the hybrid layer and more pronounced following CPP-ACP treatment.

CONCLUSION

The quality of the bonded resin-dentine interface produced after CPP-ACP treatment may depend on the adhesive system used.

摘要

目的

评价两种自酸蚀底漆黏结剂在酪蛋白磷酸肽-无定形磷酸钙（CPP-ACP）处理后与未处理牙本质形成的黏结树脂-牙本质界面的质量，与未处理牙本质进行对比。

方法

34 颗成人磨牙被切割以获得与表面平行/成一定角度或垂直的管腔方向的牙本质。标本经过 15% EDTA（2A、2B）处理后，根据是否存在玷污层（1A、1B）和有无玷污层（2A、2B）分为两组。随后，标本未经处理（1A、2A）或用 CPP-ACP 糊剂（Tooth Mousse，GC 公司）处理 60 分钟×7 天（1B、2B）。每组治疗后再分为 3 个亚组，用 2 步自酸蚀底漆黏结剂（Clearfil SE Bond，Kuraray Medical）或“一步法”黏结剂（G-Bond，GC 公司）和混合树脂复合材料进行酸蚀/预处理（不预处理；30%-40%磷酸（H(3)PO(4)）；20%聚丙烯酸）。24 小时水储存后，将黏结标本切割、打磨至 4000 粒度碳化硅砂纸和 0.25 微米金刚石糊剂，用酸碱技术进行 FE-SEM 准备、临界点干燥、镀金并进行检查。还制备并检查了黏结和断裂的牙本质界面。