In Vitro Comparison of Microleakage, Marginal Fit, and Cement Thickness of Conventional and Prepless Lithium Disilicate Veneers

IF 2.1 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Prosthodontics Pub Date : 2023-01-01 DOI:10.11607/ijp.7616

Fernanda Zapater Pierre, Amir Mohidin Demachkia, Lucas Eigi Borges Tanaka, Taciana Marco Ferraz Caneppele, Rodrigo Máximo de Araujo, João Mauricio Ferraz da Silva

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引用次数: 1

Abstract

Purpose: To assess the influence of two preparation techniques on the microleakage, marginal fit, and cement thickness of lithium disilicate veneers.

Materials and methods: A total of 24 human maxillary central incisors were divided randomly into two groups according to preparation technique (n = 12): minimally invasive preparation with butt-joint design (0.3-mm depth) and a chamfer finish line (group MP); and no preparation (NP). All teeth were restored with lithium disilicate veneers cemented with photopolymerizable resin cement. Specimens were aged thermally (6,000 cycles of 5°C to 55°C) and mechanically (100,000 cycles at 100 N, 4 Hz). Specimens were immersed in fuchsin for 24 hours employing a standard dye penetration technique, then sectioned and evaluated under a stereomicroscope (x20). Data were analyzed by ANOVA and Kruskal-Wallis tests (P < .05).

Results: There was significant microleakage (P = .0163) at the cervical area compared to the proximal area. The marginal fit was similar, with no statistical difference (P = .212) between groups MP (153 ± 81 μm) and NP (111 ± 74 μm). Group MP showed a significantly (P = .006) reduced cement thickness at the cervical area (87 ± 27 μm) compared to group NP (210 ± 89 μm).

Conclusion: Although the preparation technique was shown to influence the cement thickness, it did not show any influence on microleakage or marginal fit.

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常规和无制备二硅酸锂单板的微渗漏、边缘拟合和水泥厚度的体外比较

目的：评估两种制备工艺对二硅酸锂贴面的微渗漏、边缘配合和水泥厚度的影响。材料和方法：将24颗人类上颌中切牙按预备技术随机分为两组（n=12）：对接设计（0.3mm深）和倒角完成线微创预备（MP组）；无制剂（NP）。所有牙齿均采用二硅酸锂贴面修复，并用可光聚合树脂胶结。对试样进行热老化（5°C至55°C的6000次循环）和机械老化（100 N、4 Hz下的100000次循环）。采用标准染料渗透技术将样品在品红中浸泡24小时，然后在立体显微镜（x20）下切片和评估。数据通过ANOVA和Kruskal-Wallis检验进行分析（P<.05）。结果：与近端区域相比，颈部区域存在显著的微渗漏（P=.0163）。边缘拟合相似，MP组（153±81μm）和NP组（111±74μm）之间无统计学差异（P=.212）。与NP组（210±89μm）相比，MP组颈部区域的水泥厚度（87±27μm）显著降低（P=0.006）。结论：尽管制备技术对水泥厚度有影响，但对微渗漏或边缘拟合没有任何影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Prosthodontics 医学-牙科与口腔外科

CiteScore

3.20

自引率

4.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Official Journal of the European Association for Osseointegration (EAO), the International College of Prosthodontists (ICP), the German Society of Prosthodontics and Dental Materials Science (DGPro), and the Italian Academy of Prosthetic Dentistry (AIOP) Prosthodontics demands a clinical research emphasis on patient- and dentist-mediated concerns in the management of oral rehabilitation needs. It is about making and implementing the best clinical decisions to enhance patients'' quality of life via applied biologic architecture - a role that far exceeds that of traditional prosthetic dentistry, with its emphasis on materials and techniques. The International Journal of Prosthodontics is dedicated to exploring and developing this conceptual shift in the role of today''s prosthodontist, clinician, and educator alike. The editorial board is composed of a distinguished team of leading international scholars.