Albaheli Bahil-Imad, Elawsya Mohamed-Elshirbeny, Ali Ashraf-Ibrahim
Postgraduate MSc student, Department of Conservative Dentistry, Faculty of Dentistry, Mansoura University, Egypt.
Lecturer, Department of Conservative Dentistry, Faculty of Dentistry, Mansoura University, Egypt.
J Clin Exp Dent. 2024 Apr 1;16(4):e431-e439. doi: 10.4317/jced.61279. eCollection 2024 Apr.
This study aimed to evaluate the microleakage of lithium disilicate veneers with finish lines placed cervically in different substrates (enamel, dentin, and resin composite) and bonded with light-cure (LC) and amine-free dual-cure (DC) resin cements.
Forty-eight human maxillary central incisors were randomly assigned into three groups according to finish line substrate (n=16/group). Each group was subdivided randomly into two subgroups (n=8/subgroup) according to resin cement type: LC resin cement (Variolink Esthetic LC, Ivoclar Vivadent) and DC resin cement (Variolink Esthetic DC, Ivoclar Vivadent). All the specimens received lithium disilicate veneers (IPS e.max Press, Ivoclar Vivadent). After 5000 cycles of thermocycling, the microleakage was measured using the dye penetrating technique. Data were analyzed statistically using Scheirer Ray Hare test, Kruskal-Wallis H-test, and Mann-Whitney U-test. The level of significance was set at ≤ .05.
There was a statistically significant difference between different substrates in microleakage (=.001), but there was no statistically significant difference between resin cements (=.907), and there was no interaction between substrates and resin cements (p=.983). Microleakage was lesser when the finish line was placed at enamel and resin composite than at dentin. Similar leakage scores were observed with LC and DC resin cements.
The finish line of ceramic veneer is suggested to be placed in enamel or good-quality resin composite restoration. Regarding microleakage and durability, LC and amine-free DC resin cements are suggested for ceramic veneer cementation. Different substrates, Dual-cure resin cement, Light-cure resin cement, Lithium disilicate veneers, Microleakage.
本研究旨在评估在不同基底（牙釉质、牙本质和树脂复合材料）上颈部放置边缘线的二硅酸锂贴面的微渗漏情况，以及使用光固化（LC）和无胺双固化（DC）树脂水门汀粘结时的微渗漏情况。
48颗人上颌中切牙根据边缘线基底随机分为三组（每组n = 16）。每组再根据树脂水门汀类型随机分为两个亚组（每组n = 8）：LC树脂水门汀（Variolink Esthetic LC，义获嘉伟瓦登特公司）和DC树脂水门汀（Variolink Esthetic DC，义获嘉伟瓦登特公司）。所有标本均制作二硅酸锂贴面（IPS e.max Press，义获嘉伟瓦登特公司）。经过5000次热循环后，采用染料渗透技术测量微渗漏情况。数据采用Scheirer Ray Hare检验、Kruskal-Wallis H检验和Mann-Whitney U检验进行统计学分析。显著性水平设定为≤0.05。
不同基底之间的微渗漏存在统计学显著差异（P = 0.001），但树脂水门汀之间无统计学显著差异（P = 0.907），基底和树脂水门汀之间也无相互作用（P = 0.983）。当边缘线置于牙釉质和树脂复合材料上时，微渗漏比置于牙本质上时少。LC和DC树脂水门汀的渗漏评分相似。
建议陶瓷贴面的边缘线置于牙釉质或优质树脂复合材料修复体中。关于微渗漏和耐久性，建议使用LC和无胺DC树脂水门汀进行陶瓷贴面粘结。不同基底、双固化树脂水门汀、光固化树脂水门汀、二硅酸锂贴面、微渗漏
