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In Vitro Investigation of Wear of CAD/CAM Polymeric Materials Against Primary Teeth

1
Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea
2
Department of Pediatric Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Materials 2017, 10(12), 1410; https://doi.org/10.3390/ma10121410
Received: 25 October 2017 / Revised: 30 November 2017 / Accepted: 8 December 2017 / Published: 9 December 2017
The aim of the study was to evaluate the effects of polymeric computer-aided design/computer-aided manufacturing CAD/CAM materials on antagonistic primary tooth wear. Five CAD/CAM polymeric materials were examined: Vipi Block Monocolor (VBM), Yamahachi polymethylmethacrylate (PMMA) (YAP), Mazic Duro (MZD), Vita Enamic (ENA), and Pekkton (PEK). All of the specimens were tested in a thermomechanical loading machine with the primary canine as the antagonist (50 N, 1.2 × 105 cycles, 1.7 Hz, 5/55 °C). The wear losses of the antagonist tooth and the restorative materials were calculated using reverse modelling software and an electronic scale. VBM and ENA showed significantly higher antagonist tooth wear than PEK (p < 0.05), but there was no significant difference observed among VBM, YAP, MZD, and ENA (p > 0.05). PEK showed the largest value in both material volumetric and weight losses. In terms of material volumetric losses, there was no significant difference between all of the groups (p > 0.05). In terms of material weight losses, PEK was significantly larger than ENA (p < 0.05), but there was no significant difference between VBM, YAP, MZD, and ENA (p > 0.05). Volumetric and weight losses of materials showed similar wear behaviour. However, the wear patterns of antagonists and materials were different, especially in PEK. View Full-Text
Keywords: CAD/CAM; resin nano ceramic; polymer infiltrated ceramic network; PEKK; primary tooth; wear CAD/CAM; resin nano ceramic; polymer infiltrated ceramic network; PEKK; primary tooth; wear
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Choi, J.-W.; Song, E.-J.; Shin, J.-H.; Jeong, T.-S.; Huh, J.-B. In Vitro Investigation of Wear of CAD/CAM Polymeric Materials Against Primary Teeth. Materials 2017, 10, 1410.

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