Surface Evaluation of Resilient CAD/CAM ceramics after Contouring and Polishing

Geetha Duddanahalli Siddanna; Andre J Valcanaia; Pilar Herrera Fierro; Gisele F Neiva; Dennis J Fasbinder

doi:10.1111/jerd.12735

Surface Evaluation of Resilient CAD/CAM ceramics after Contouring and Polishing

J Esthet Restor Dent. 2021 Jul;33(5):750-763. doi: 10.1111/jerd.12735. Epub 2021 May 10.

Authors

Geetha Duddanahalli Siddanna¹, Andre J Valcanaia², Pilar Herrera Fierro³, Gisele F Neiva⁴, Dennis J Fasbinder⁵

Affiliations

¹ Clinical Lecturer, Department of Cariology, Restorative Sciences & Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.
² Graduate Restorative Dentistry Program Associate Director, Department of Cariology, Restorative Sciences & Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.
³ LNF Service Director, Lurie Nanofabrication Facility, University of Michigan, Ann Arbor, Michigan, USA.
⁴ Clinical Professor, Graduate Restorative Dentistry Program Director, Department of Cariology, Restorative Sciences & Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.
⁵ Clinical Professor, Department of Cariology, Restorative Sciences & Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA.

PMID: 33973352
DOI: 10.1111/jerd.12735

Abstract

Objective: This in-vitro study measured the differences in surface roughness for computer assisted design/computer assisted manufacturing (CAD/CAM) resilient ceramic and CAD/CAM composite materials.

Materials and methods: The materials included Lava Ultimate (3 M), Cerasmart (GC America), Vita Enamic (Vita Zahnfabrik), and Brilliant Crios (Coltene). One calibrated operator polished each material with three polishing sytems: spiral polishers (Diacomp FeatherLite/Brasseler), rubbercup polishers (Enhance/DentsplyCaulk), and brush-paste (Diashine/VH Technologies). Surface roughness was assessed using a confocal laser microscope (Lext OLS4000/Olympus).

Results: A two-way ANOVA revealed statistically significant differences in mean surface roughness values (Sa) among materials and polishers. Tukey multiple comparisons showed that mean Sa values for Lava Ultimate, Enamic, Cerasmart and Brilliant Crios polished with brush-paste as well as Lava Ultimate and Cerasmart values polished with spiral polishers were not significantly different from each other.

Conclusions: The finished surfaces were significantly smoother than milled surfaces for all materials. The brush-paste polishing technique created the lowest surface roughness values for all CAD/CAM materials and values were comparable to what was achieved by spiral polishers for Lava Ultimate and Cerasmart. Rubber polishers did not provide a clinically smooth surface for CAD/CAM resilient ceramic/composite materials.

Clinical significance: The results of the study indicate that polishing creates smooth surfaces for CAD/CAM resilient ceramic and CAD/CAM composite restorations.

Keywords: CAD/CAM; chair-side CAD/CAM; hybrid ceramics; polishing; resilient ceramics; resin composite CAD/CAM.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ceramics
Composite Resins*
Computer-Aided Design
Dental Materials*
Dental Porcelain
Materials Testing
Surface Properties

Substances

Composite Resins
Dental Materials
Dental Porcelain

Grants and funding

Delta Dental of Michigan