Influence of Thickness and Translucency of Lithium Disilicate Ceramic on the Degree of Conversion of Resin Cements with Different Initiators.

IF 1.1 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

European Journal of Prosthodontics and Restorative Dentistry Pub Date : 2024-02-29 DOI:10.1922/EJPRD_2552Lima08

S C Lima, A C A da Silva, R Cimões, B C F Vajgel

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Abstract

Introduction: The degree of conversion (DC) of resin cements can be affected by ceramics, and by the type of resin cement. The purpose was to evaluate the influence of thickness and translucencies of lithium disilicate ceramic on the DC of resin cements: two light-cure (Variolink LC; NX3 LC) and one dual-cure (NX3 Dual).

Methods: IPS e.max Press ceramic (A2) discs were prepared in 4 thicknesses (0.3, 0.5, 1.0, and 1.5 mm) and in 3 translucencies: HT (high translucency), LT (low translucency), and MO (medium opacity). Subsequently, 234 samples of resin cement (5 x 1 mm) were light-cured through those ceramic discs. The DC was assessed by Fourier Transform Infrared Spectroscopy (FTIR).

Results: Ceramic thicknesses decreased DC of NX3 Dual through HT-1.0 and HT 1.5 (p=0.005). Between translucencies, only MO-0.3 affected Variolink LC DC (p=0.018). There was difference among light- and dual-cured resin cements (p=0.001).

Conclusion: Increasing thickness and opacity lead to a decrease in the DC of all resin cements, with a significantly lower DC value in NX3 Dual (HT-1.0; HT-1.5), and in Variolink LC (MO- 0.3). Light- and dual-cured resin cements were different among each other. NX3 Dual achieved a significantly lower value than its counterpart NX3 LC.

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二硅酸锂陶瓷的厚度和透光率对不同引发剂树脂胶凝材料转化率的影响。

简介：树脂水泥的转化率（DC）受陶瓷和树脂水泥类型的影响。目的是评估二硅酸锂陶瓷的厚度和半透明性对树脂胶结物DC的影响：两种光固化（Variolink LC；NX3 LC）和一种双固化（NX3 dual）。随后，234个树脂水泥（5 x 1 mm）样品通过这些陶瓷盘进行光固化。通过傅立叶变换红外光谱（FTIR）评估DC。结果：NX3 Dual的陶瓷厚度通过HT-1.0和HT1.5降低了DC（p=0.005）。在半透明之间，只有MO-0.3影响Variolink LC的DC（p=0.018）。光固化和双固化树脂水泥之间存在差异（p=0.001）。NX3 Dual的价值明显低于其同类产品NX3 LC。

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来源期刊

European Journal of Prosthodontics and Restorative Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The European Journal of Prosthodontics and Restorative Dentistry is published quarterly and includes clinical and research articles in subjects such as prosthodontics, operative dentistry, implantology, endodontics, periodontics and dental materials.