J Adv Prosthodont.  2020 Feb;12(1):22-32. 10.4047/jap.2020.12.1.22.

Effect of surface treatments and universal adhesive application on the microshear bond strength of CAD/CAM materials

• ÅžiÅŸmanoÄŸlu S
• Gürcan AT
• Yıldırım-Bilmez Z
• Turunç-OÄŸuzman R
• GümüştaÅŸ B

• KMID: 2470794
• DOI: http://doi.org/10.4047/jap.2020.12.1.22

Abstract

PURPOSE
The aim of this study was to evaluate the microshear bond strength (µSBS) of four computer-aided design/computer-aided manufacturing (CAD/CAM) blocks repaired with composite resin using three different surface treatment protocols.
MATERIALS AND METHODS
Four different CAD/CAM blocks were used in this study: (1) flexible hybrid ceramic (FHC), (2) resin nanoceramic (RNC), (c) polymer infiltrated ceramic network (PICN) and (4) feldspar ceramic (FC). All groups were further divided into four subgroups according to surface treatment: control, hydrofluoric acid etching (HF), air-borne particle abrasion with aluminum oxide (AlO), and tribochemical silica coating (TSC). After surface treatments, silane was applied to half of the specimens. Then, a silane-containing universal adhesive was applied, and specimens were repaired with a composite, Next, μSBS test was performed. Additional specimens were examined with a contact profilometer and scanning electron microscopy. The data were analyzed with ANOVA and Tukey tests.
RESULTS
The findings revealed that silane application yielded higher µSBS values (P<.05). All surface treatments were showed a significant increase in µSBS values compared to the control (P<.05). For FHC and RNC, the most influential treatments were AlO and TSC (P<.05).
CONCLUSION
Surface treatment is mandatory when the silane is not preferred, but the best bond strength values were obtained with the combination of surface treatment and silane application. HF provides improved bond strength when the ceramic content of material increases, whereas AlO and TSC gives improved bond strength when the composite content of material increases.

Keyword

Dental restoration repair; Ceramics; Shear strength; Dental bonding

MeSH Terms

Adhesives*
Aluminum Oxide
Ceramics
Clinical Protocols
Dental Bonding
Dental Restoration Repair
Hydrofluoric Acid
Microscopy, Electron, Scanning
Polymers
Shear Strength
Silicon Dioxide
Adhesives
Aluminum Oxide
Hydrofluoric Acid
Polymers
Silicon Dioxide

Figure

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  Fig. 1 SEM and surface topography images of FHC material.

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  Fig. 2 SEM and surface topography images of RNC material.

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  Fig. 3 SEM and surface topography images of PICN material.

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  Fig. 4 SEM and surface topography images of FC material.

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