Influence of bonding surface and bonding methods on the fracture resistance and survival rate of full-coverage occlusal veneers made from lithium disilicate ceramic after cyclic loading.
All-Ceramic
Ceramic thickness
Dental bonding surface
Fracture resistance
Full-Coverage molar restoration
Self-Etching primer
Journal
Dental materials : official publication of the Academy of Dental Materials
ISSN: 1879-0097
Titre abrégé: Dent Mater
Pays: England
ID NLM: 8508040
Informations de publication
Date de publication:
10 2019
10 2019
Historique:
received:
03
12
2018
revised:
27
05
2019
accepted:
01
07
2019
pubmed:
29
7
2019
medline:
18
12
2019
entrez:
29
7
2019
Statut:
ppublish
Résumé
The purpose of this laboratory study was to evaluate the influence of bonding method and type of dental bonding surface on fracture resistance and survival rate of resin bonded occlusal veneers made from lithium disilicate ceramic after cyclic loading. Fourty-eight extracted molars were divided into three groups (N=16) depending on the preparation: within enamel, within dentin/enamel or within enamel/composite resin filling. Lithium disilicate occlussal veneers were fabricated with a fissure-cusp thickness of 0.3-0.6mm. Restorations were etched (5% HF), silanated and adhesively luted using a dual-curing luting composite resin. Test groups were divided into two subgroups, one using a only a self-etching primer, the other additionally etching the enamel with phosphoric acid. After water storage (37°C; 21d) and thermocycling (7500 cycles; 5-55°C), specimens were subjected to dynamic loading in a chewing simulator (600,000 cycles; 10kg/2Hz). Surviving specimens were loaded until fracture using a universal testing machine. All specimens survived artificial aging, several specimens showed some damage. ANOVA revealed that enamel etching provided statistically significantly (p≤0.05) higher fracture resistance than self-etching when bonding to enamel and dentin. Self-etching provided statistically significant (p≤0.05) higher fracture resistance for the enamel-composite group than for the enamel group. Enamel etching provided statistically significant (p≤0.05) higher fracture resistance for the enamel and dentin group than for groups enamel and enamel-composite. Etching enamel improved the fracture resistance of occlusal veneers when bonding to dentin and enamel and increased the survival rate when bonding to enamel.
Identifiants
pubmed: 31351579
pii: S0109-5641(18)31346-0
doi: 10.1016/j.dental.2019.07.001
pii:
doi:
Substances chimiques
Resin Cements
0
lithia disilicate
0
Dental Porcelain
12001-21-7
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
1351-1359Informations de copyright
Copyright © 2019 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.