不同引发剂对不同厚度和半透明度二硅酸锂陶瓷的树脂水门汀转化率的影响。
Influence of Thickness and Translucency of Lithium Disilicate Ceramic on the Degree of Conversion of Resin Cements with Different Initiators.
机构信息
Doctoral student, Department of prosthesis and oral facial surgery, Federal University of Pernambuco (UFPE), Recife, Pernambuco, Brazil.
Undergraduated student, Department of prosthesis and oral facial surgery, Federal University of Pernambuco (UFPE), Recife, Pernambuco, Brazil.
出版信息
Eur J Prosthodont Restor Dent. 2024 Feb 29;32(1):83-90. doi: 10.1922/EJPRD_2552Lima08.
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.
简介
树脂水门汀的转化率（DC）可能会受到陶瓷的影响，以及树脂水门汀的类型。目的是评估锂硅陶瓷的厚度和不透明度对树脂水门汀 DC 的影响：两种光固化（Variolink LC；NX3 LC）和一种双重固化（NX3 Dual）。
方法
IPS e.max Press 陶瓷（A2）圆盘制备了 4 种厚度（0.3、0.5、1.0 和 1.5 毫米）和 3 种不透明度：HT（高不透明度）、LT（低不透明度）和 MO（中不透明度）。随后，通过这些陶瓷圆盘对 234 个树脂水门汀（5 x 1 毫米）样本进行光固化。通过傅里叶变换红外光谱（FTIR）评估 DC。
结果
陶瓷厚度降低了 NX3 Dual 的 HT-1.0 和 HT 1.5 的 DC（p=0.005）。在不透明度方面，只有 MO-0.3 影响了 Variolink LC 的 DC（p=0.018）。光固化和双重固化树脂水门汀之间存在差异（p=0.001）。
结论
增加厚度和不透明度会降低所有树脂水门汀的 DC，其中 NX3 Dual（HT-1.0；HT-1.5）和 Variolink LC（MO-0.3）的 DC 值显著降低。光固化和双重固化树脂水门汀彼此之间存在差异。NX3 Dual 的值明显低于其对应物 NX3 LC。
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