Refereed journal article or data article (A1)
Influence of toothbrush abrasion on the surface characteristics of CAD/CAM composite resin blocks with shade gradations
List of Authors: Ishida Yoshiki, Miura Daisuke, Shinya Akikazu
Publisher: JAPANESE SOC DENTAL MATERIALS DEVICES
Publication year: 2023
Journal: Dental Materials Journal
Journal name in source: DENTAL MATERIALS JOURNAL
Journal acronym: DENT MATER J
Volume number: 42
Issue number: 2
Start page: 193
End page: 198
Number of pages: 6
ISSN: 0287-4547
DOI: http://dx.doi.org/10.4012/dmj.2022-174
URL: https://doi.org/10.4012/dmj.2022-174
Abstract
Crown restorations in anterior region are recommended highly color-reproductivity because of aesthetic reason. Composite resin block with several shade gradations is especially produced for anterior restorations. To clarify the durability of an aesthetic, the effect of toothbrush abrasion on surface properties was performed. Composite-resin blocks without shade gradation and a ceramic block were used as controls. All specimens were prepared using #2000 SiC paper and polished using an aluminum oxide polishing paste. Toothbrush abrasion tests were carried out for 20,000 cycles at a frequency of 2 Hz with 2.0 N load. Gloss and surface roughness were measured before and after toothbrush abrasion. The number of repetitions was set to five. It was clarified that tooth brushing caused to decrease in the gloss and to increase in the surface roughness with significant negative correlations between these results not only in composite-resin blocks without shade gradation but also in those with gradation.
Crown restorations in anterior region are recommended highly color-reproductivity because of aesthetic reason. Composite resin block with several shade gradations is especially produced for anterior restorations. To clarify the durability of an aesthetic, the effect of toothbrush abrasion on surface properties was performed. Composite-resin blocks without shade gradation and a ceramic block were used as controls. All specimens were prepared using #2000 SiC paper and polished using an aluminum oxide polishing paste. Toothbrush abrasion tests were carried out for 20,000 cycles at a frequency of 2 Hz with 2.0 N load. Gloss and surface roughness were measured before and after toothbrush abrasion. The number of repetitions was set to five. It was clarified that tooth brushing caused to decrease in the gloss and to increase in the surface roughness with significant negative correlations between these results not only in composite-resin blocks without shade gradation but also in those with gradation.
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