IADR 95th

55/75

-55-CERASMART3202 Polish Retention of Newer Ceramic-Polymer CAD/CAM MaterialsPoster Presentation11:00 AM–12:15 PM Mar 25, 2017CC, First Floor Authors:Authors:Kristie Partin-Agarwal(Presenter)USAFNancy Motyka, USAFJeffrey Jessup, USAFRobert Terwilliger, US Air ForceWenLien, US Air ForceKraigVandewalle, USAFAbstract: Objectives: The purpose of this study was to evaluate the polish retention of ceramic-polymer CAD/CAM materials after toothbrush abrasion.Methods: Four ceramic-polymer materials were compared (Enamic, Vita; Lava Ultimate, 3M/ESPE; CeraSmart, GC; and Block HC, Shofu). The surface of ten blocks from each material were ground with a diamond bur (Cylinder-Pointed Bur 12S, Sirona) to simulate a milled surface in a slow-speed handpiece. The blocks were polished in a polishing machine (Ecomet3, Buehler) using various grits of silicon-carbide paper. Baseline surface roughness measurements were using various grits of silicon-carbide paper. Baseline surface roughness measurements were made after polishing using a non-contact, 3D laser scanning confocalmicroscope (VK-X250, Keyence). Specimens were then brushed in a toothpaste slurry using a toothbrush machine (SabriDental Enterprises) for 30,000 (30K) strokes and re-scanned. A mean surface roughness (Sa) and standard deviation were determined after baseline and 30K brushing strokes. Differences between baseline and 30K were analyzed with an ANOVA/Tukey’s(alpha=0.05).Results: Significant differences were found between groups (P<0.001). See table attached.Conclusions: Enamichad the least change in roughness from baseline but it was not significantly Conclusions: Enamichad the least change in roughness from baseline but it was not significantly different from Lava Ultimate or CeraSmart. Block HC had significantly greater change in surface roughness than the other materials.Image(s):Disclosure Statement:The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NoneI have read the IADR policy on licensing.Signed by KraigVandewalleReprinted with permission from the Journal of Dental Research, J Dent Res 96 (Spec Iss A):-55-abstract number 3202, https://iadr2017.zerista.com/event/member/330686, 2017