不同修复材料修复牙冠边缘边缘间隙时微渗漏的比较。

Comparison of microleakage between different restorative materials to restore marginal gap at crown margin.

作者信息

Haralur Satheesh B, Al Ghaseb Ghaseb Ahmed, Alqahtani Norah Ali, Alqahtani Bader

机构信息

Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Asir, Saudi Arabia.

出版信息

PeerJ. 2021 Feb 25;9:e10823. doi: 10.7717/peerj.10823. eCollection 2021.

DOI:10.7717/peerj.10823

PMID:33665019

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7916530/

Abstract

BACKGROUND

An occurrence of secondary caries around the indirect restoration margin is reported to remain a leading cause of failures.

OBJECTIVE

This study aimed to test the interfacial microleakage of conventional glass-ionomer (CGI), resin-modified glass ionomer (RMGI) and Nano-hybrid composite (CR) restorations at a full veneer margin crown.

METHODS

Ninety human extracted molar teeth were divided into three groups ( = 30). Each group was subdivided into three subgroups ( = 10) according to the extent of the structural defects; The structural defect in G1 had a depth of 1.5 mm, width and length at 2 mm and 1 mm intrusion within the crown cervical margin. The corresponding structural defect dimension values for G2 were 2, 5, 4 and 2 mm with defects extending onto the root structure. Meanwhile, G3: structural deficiency of 2 mm depth, 3 mm width and 3 mm length and with 1.5 mm extension into the prepared teeth. These structural defects in each subgroup were restored with CGI, RMGI and CR. Artificial carious lesion formation was induced at the cervical finish line with a demineralizing solution. The artificial carious lesions were restored as per the group distribution. Subsequently, teeth samples were prepared and cemented with Nickel-chromium full coverage restorations utilizing glass-ionomer luting cement. Teeth samples were thermocycled, isolated with nail varnish, and immersed in 0.1% methylene blue for 24 h. The teeth samples were sectioned longitudinally, dye penetration was evaluated with a stereomicroscope. The data were analyzed with Kruskal-Wallis and Mann-Whitney tests.

RESULTS

CGI-G1 recorded the highest micro-leakage score at 1.450; while CR-G3 recorded the least score (0.350). At a cementum-restoration interface, CR-G1 (0.850) documented the lowest micro-leakage; RMGI-G3 had a greater value at 1.700.

CONCLUSIONS

The hybrid CR could be effectively used to restore the restoration of a marginal gap around crown margins.

摘要

背景

据报道，间接修复体边缘继发龋的发生仍然是修复失败的主要原因。

目的

本研究旨在测试传统玻璃离子水门汀（CGI）、树脂改性玻璃离子水门汀（RMGI）和纳米混合复合树脂（CR）修复体在全冠边缘的界面微渗漏情况。

方法

将90颗拔除的人磨牙分为三组（n = 30）。根据结构缺损程度，每组再细分为三个亚组（n = 10）；G1组的结构缺损深度为1.5mm，宽度和长度分别为2mm，冠颈缘内侵入1mm。G2组相应的结构缺损尺寸值为2、5、4和2mm，缺损延伸至牙根结构。同时，G3组：结构缺损深度为2mm，宽度为3mm，长度为3mm，向预备牙内延伸1.5mm。每个亚组的这些结构缺损分别用CGI、RMGI和CR进行修复。用脱矿溶液在颈部边缘线处诱导人工龋损形成。人工龋损根据分组分布进行修复。随后，制备牙齿样本，并用玻璃离子水门汀粘固镍铬全冠修复体。对牙齿样本进行热循环处理，用指甲油隔离，然后浸入0.1%亚甲蓝中24小时。将牙齿样本纵向切片，用体视显微镜评估染料渗透情况。数据采用Kruskal-Wallis和Mann-Whitney检验进行分析。