J Adv Prosthodont.
2020 Oct;12(5):251-258. 10.4047/jap.2020.12.5.251.
Shear bond strength between CAD/CAM denture base resin and denture artificial teeth when bonded with resin cement
- Affiliations
-
- 1Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Republic of Korea
- 2Department of Dental Laboratory Technology, Daejeon Health Institute of Technology, Daejeon, Republic of Korea
- 3Department of Prosthododntics, College of Dentistry, Dankook Univeristy, Cheonan, Republic of Korea
- KMID: 2508417
- DOI: http://doi.org/10.4047/jap.2020.12.5.251
Abstract
- PURPOSE
The bond strengths between resin denture teeth with various compositions and denture base resins including conventional and CAD/CAM purposed materials were evaluated to find influence of each material.
MATERIALS AND METHODS
Cylindrical rods (6.0 mm diameter × 8.0 mm length) prepared from pre-polymerized CAD/CAM denture base resin blocks (PMMA Block-pink; Huge Dental Material, Vipi Block-Pink; Vipi Industria) were bonded to the basal surface of resin teeth from three different companies (VITA MFT® ; VITA Zahnfabrik, Endura Posterio® ; SHOFU Dental, Duracross Physio® ; Nissin Dental Products Inc.) using resin cement (Super-Bond C&B; SUN MEDICAL). As a control group, rods from a conventional heat-polymerizing denture base resin (Vertex™ Rapid Simplified; Vertex-Dental B.V. Co.) were attached to the resin teeth using the conventional flasking and curing method. Furthermore, the effect of air abrasion was studied with the highly cross-linked resin teeth (VITA MFT® ) groups. The shear bond strengths were measured, and then the fractured surfaces were examined to analyze the mode of failure.
RESULTS
The shear bond strengths of the conventional heat-polymerizing PMMA denture resin group and the CAD/CAM denture base resin groups were similar. Air abrasion to VITA MFT® did not improve shear bond strengths. Interfacial failure was the dominant cause of failure for all specimens.
CONCLUSION
Shear bond strengths of CAD/CAM denture base materials and resin denture teeth using resin cement are comparable to those of conventional methods.
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