Journal article
Different surface treatment strategies on etchable CAD-CAM materials: Part II-Effect on the bond strength
The Journal of prosthetic dentistry, Vol.130(5), pp.770-779
11/2023
DOI: 10.1016/j.prosdent.2021.10.007
PMID: 35101273
Abstract
Bonding to recently launched polymer-based computer-aided design and computer-aided manufacturing (CAD-CAM) materials has been challenging. Evidence regarding etching strategies for dual-phase CAD-CAM materials is sparse, but adequate bonding is crucial for the clinical success and longevity of a restoration.
The purpose of this 2-part in vitro study was to evaluate and compare the effect of surface treatment strategies on the microshear bond strength and work of adhesion of polymer-based and ceramic materials. In addition, chemical elements present on the surface and the interface morphology after using those strategies were also assessed.
Two CAD-CAM polymer and 1 CAD-CAM ceramic materials were selected for this in vitro study. The materials were subjected to different surface treatment strategies, including airborne-particle abrasion and the application of 9% hydrofluoric acid. Specimens were submitted to microshear bond strength before and after thermocycling, and the failure mode was classified. The work of adhesion was calculated based on the water-to-air surface tension of 72.8 mN.m
and the Young- Dupré equation. The surfaces were submitted to energy-dispersive X-ray spectroscopy, and the interfaces were analyzed using a scanning electron microscope. Data were subjected to 2-way ANOVA and the Tukey post hoc test (α=.05).
The highest microshear bond strength means were observed for the polymer-based materials when hydrofluoric acid or airborne-particle abrasion was applied. The 3 materials tested showed a decrease in microshear bond strength after thermocycling, except for applying airborne-particle abrasion to 1 of the polymer-based material tested. The ceramic material tested showed a high microshear bond strength with the application of airborne-particle abrasion and hydrofluoric acid combined. The work of adhesion varied across the materials and presented high means when hydrofluoric acid was used.
A combination of airborne-particle abrasion plus hydrofluoric acid should be considered for polymer-based or feldspathic ceramic CAD-CAM materials. In this in vitro study, both etching procedures combined produced higher bonding values for all materials tested.
Details
- Title: Subtitle
- Different surface treatment strategies on etchable CAD-CAM materials: Part II-Effect on the bond strength
- Creators
- Thiago Soares Porto - The Ohio State UniversityItalo Guimaraes Medeiros da Silva - Case Western Reserve UniversityBruna de Freitas Vallerini - Universidade Estadual Paulista (Unesp)Mario Fernando de Goes - Universidade Estadual de Campinas (UNICAMP)
- Resource Type
- Journal article
- Publication Details
- The Journal of prosthetic dentistry, Vol.130(5), pp.770-779
- DOI
- 10.1016/j.prosdent.2021.10.007
- PMID
- 35101273
- NLM abbreviation
- J Prosthet Dent
- ISSN
- 0022-3913
- eISSN
- 1097-6841
- Language
- English
- Electronic publication date
- 01/28/2022
- Date published
- 11/2023
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984420835802771
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