IADR Abstract Archives
Two-body Wear Behavior of Nano-hybrid Technology Produced CAD/CAM Composite-resin Blocks
Objectives: The nano-hybrid technology by VOCO (VOCO GmbH, Cuxhaven, Germany) can highly increase the glass filler content of CAD/CAM composite-resin block (CRB), making it a promising dental material for long-term indirect restorations. As wear behavior is one of the major concerns of long-term clinical performance, the objective of this study was to investigate the two-body wear behavior of novel CAD/CAM CRB Grandio Blocks produced by nano-hybrid technology, compared with established aesthetic metal-free CAD/CAM dental materials.
Methods: Highly polished flat samples (n=12, totally 96) were made from eight CAD/CAM materials (Tab.1). Steatite balls were used as antagonists. Two-body wear simulation was conducted by a mastication simulator (Willytec GmbH, Munich, Germany). Load of 5 kg, sliding movement of 0.2 mm and 1.2×106 cycles were applied to simulate 5 years' chewing in oral cavity. Vickers hardness (load of 300 g, 15 s) and filler content were also measured. The samples’ and antagonists’ vertical loss were measured and statistically analyzed by one-way ANOVA, Tukey’s honest test was used as post hoc comparison.
Results: Results are shown in Tab.1. Grandio Blocks showed best properties among all the four CRBs. It achieved higher inorganic filler content (82.5% wt) and Vickers Hardness (HV0.3=155) than established CRBs. It showed similar wear behavior as the glass ceramics and Enamic, better material wear resistance than Ultimate and its wear to antagonists were not statistically different from all the other tested materials (Fig.1).
Conclusions: Grandio Blocks is a promising alternative CAD/CAM dental restorative material which can be used for long-term indirect restorations as it has a biaxial flexural strength as high as 333 MPa, can provide similar wear resistance as the glass ceramics and Enamic, better than Ultimate and won’t generate more antagonists wear than all the other tested materials.
Methods: Highly polished flat samples (n=12, totally 96) were made from eight CAD/CAM materials (Tab.1). Steatite balls were used as antagonists. Two-body wear simulation was conducted by a mastication simulator (Willytec GmbH, Munich, Germany). Load of 5 kg, sliding movement of 0.2 mm and 1.2×106 cycles were applied to simulate 5 years' chewing in oral cavity. Vickers hardness (load of 300 g, 15 s) and filler content were also measured. The samples’ and antagonists’ vertical loss were measured and statistically analyzed by one-way ANOVA, Tukey’s honest test was used as post hoc comparison.
Results: Results are shown in Tab.1. Grandio Blocks showed best properties among all the four CRBs. It achieved higher inorganic filler content (82.5% wt) and Vickers Hardness (HV0.3=155) than established CRBs. It showed similar wear behavior as the glass ceramics and Enamic, better material wear resistance than Ultimate and its wear to antagonists were not statistically different from all the other tested materials (Fig.1).
Conclusions: Grandio Blocks is a promising alternative CAD/CAM dental restorative material which can be used for long-term indirect restorations as it has a biaxial flexural strength as high as 333 MPa, can provide similar wear resistance as the glass ceramics and Enamic, better than Ultimate and won’t generate more antagonists wear than all the other tested materials.
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