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. 2017 Feb 28;10(3):244.
doi: 10.3390/ma10030244.

Wear Behavior of Ceramic CAD/CAM Crowns and Natural Antagonists

Ella A Naumova  1 , Stephan Schneider  2 , Wolfgang H Arnold  3 , Andree Piwowarczyk  4
Affiliations

Wear Behavior of Ceramic CAD/CAM Crowns and Natural Antagonists

Ella A Naumova et al. Materials (Basel). .

Abstract

Objective: Evaluation of wear behavior of computer-aided design/computer-aided manufacturing (CAD/CAM) crowns from various restorative materials and natural antagonists.

Method: Full CAD/CAM crowns fabricated with nanoceramic resin (Lava Ultimate (LU)), a glass ceramic in a resin interpenetrating matrix (Vita Enamic (VE)) and a lithium silicate reinforced ceramic enriched with zirconia (Vita Suprinity (VS)) were cemented on human molars. The crown and antagonists were subjected to simulated chewing. 3D data sets, before and after the chewing simulation, were generated and matched. Occlusal surface roughness, vertical and volume loss of the crowns and antagonists were analyzed.

Results: Crown roughness was significantly different between the LU and VE groups after chewing simulation. Crown vertical loss differed in all groups. The highest crown volume loss was found in the LU group, and the lowest in the VE group. Comparisons between the LU and VE groups and the LU and VS groups were significantly different. The highest antagonist volume loss was reached in the VE group, the lowest was in the LU group.

Conclusion: Roughness increased after chewing simulation. LU crowns are the most natural antagonist-friendly; these were the most susceptible to vertical and volume loss. Of the tested materials, the VE crowns are the most stable regarding occlusion.

Keywords: CAD/CAM; full ceramic crowns; glass-matrix ceramics; natural antagonist; resin-matrix ceramics; surface morphology; volume loss; wear.

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Conflict of interest statement

The authors declare no conflict of interest. The study was financed from the institutional budget of Witten/Herdecke University.

Figures

Figure 1
Figure 1
Three-dimensional surface images (stereolithographic (STL) files of the surface scan of the occlusal surfaces made from the different materials before and after chewing simulation: Lava Ultimate (a) before, (b) after; Vita Enamic (c) before, (d) after and Vita Suprinity (e) before, (f) after.
Figure 1
Figure 1
Three-dimensional surface images (stereolithographic (STL) files of the surface scan of the occlusal surfaces made from the different materials before and after chewing simulation: Lava Ultimate (a) before, (b) after; Vita Enamic (c) before, (d) after and Vita Suprinity (e) before, (f) after.
Figure 2
Figure 2
The main abraded cusp wear (vertical loss) of the full ceramic CAD/CAM molar crowns and the natural antagonists after chewing simulation (in µm).
Figure 3
Figure 3
Total occlusial abrasive wear (volume loss) of the full ceramic CAD/CAM molar crowns and the natural antagonists after chewing simulation (in µm3).
See this image and copyright information in PMC

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