Bonding to CAD-CAM Composites: An Interfacial Fracture Toughness Approach

Bonding to CAD-CAM Composites: An Interfacial Fracture Toughness Approach

The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) composite blocks after 2 different surface pretreatme...

Full description

Saved in:
Bibliographic Details
Published in:Journal of dental research Vol. 97; no. 1; pp. 60 - 67
Main Authors: Eldafrawy, M., Ebroin, M.G., Gailly, P.A., Nguyen, J.-F., Sadoun, M.J., Mainjot, A.K.
Format: Journal Article Web Resource
Language:English
Published: Los Angeles, CA SAGE Publications 01-01-2018
SAGE PUBLICATIONS, INC
International & American Associations for Dental Research
Subjects:
Adhesives
Bond strength
Cement
Ceramics
Composite materials
Crack propagation
Data analysis
dental adhesives
dental materials
dental prosthesis retention
Dentisterie & médecine buccale
Dentistry
Dentistry & oral medicine
Etching
High temperature
Human health sciences
Lithium
Manufacturers
Manufacturing
Polymerization
resin cement
Scanning electron microscopy
Sciences de la santé humaine
surface properties
ceramics
resin cement
dental adhesives
surface properties
dental prosthesis retention
dental materials
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) composite blocks after 2 different surface pretreatments using the notchless triangular prism (NTP) test. Two DFs (Cerasmart [CRT] and Lava Ultimate [LVA]), 2 PICNs (Enamic [ENA] and experimental PICN [EXP]), and e.max CAD lithium disilicate glass-ceramic (EMX, control) prism samples were bonded to their counterparts with Variolink Esthetic DC composite cement after either hydrofluoric acid etching (HF) or gritblasting (GR). Both procedures were followed by silanization. All samples (n = 30 per group) were thermocycled (10,000 cycles) and tested for their IFT in a water bath at 36°C. Moreover, representative samples from each group were subjected to a developed interfacial area ratio (Sdr) measurement by profilometry and scanning electron microscopy (SEM) characterization. EXP-HF gave the highest IFT (1.85 ± 0.39 MPa·m1/2), followed by EMX-HF and ENA-HF, while CRT-HF gave the lowest (0.15 ± 0.22 MPa·m1/2). PICNs gave significantly better results with HF, and DF showed better results with GR. A 2-way analysis of variance indicated that there were significantly higher IFT and Sdr for PICNs than for DF. A positive correlation (r² = 0.872) was found between IFT and Sdr. SEM characterization showed the specific microstructure of the surface of etched PICNs, indicating the presence of a retentive polymer-based honeycomb structure. Etching of the typical double-network microstructure of PICNs causes an important increase in the Sdr and IFT, while DF should be gritblasted. DF exhibited significantly lower Sdr and IFT values than PICNs. The present results show the important influence of the material class and surface texture, and consequently the micromechanical bond, on the adhesive interface performance of CAD-CAM composites.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
scopus-id:2-s2.0-85038872567
ISSN:0022-0345
1544-0591
1544-0591
DOI:10.1177/0022034517728714