Journal article
Comparison of surface properties of universal shade and conventional resin-based composites after degradation and repolishing
American journal of dentistry, Vol.37(3), pp.147-153
06/01/2024
PMID: 38899995
Abstract
PURPOSE To investigate the discoloration, line roughness and gloss of conventional and universal shade resin-based composites.Clearfil AP-X (AP-X) and Estelite Sigma Quick (EQ) samples were prepared. Discoloration, roughness, and gloss were measured on mirror-polished, alkaline-degraded, and repolished surfaces. The superficial layer degraded by alkaline immersion (degraded layer) was ground off from the sample surface. After removing the degraded layer, the surface was polished with aluminum oxide powder (1.0 µm and 0.3 µm), to create a repolished specimen. Scanning electron microscopy observations were made of the specimens.METHODS Clearfil AP-X (AP-X) and Estelite Sigma Quick (EQ) samples were prepared. Discoloration, roughness, and gloss were measured on mirror-polished, alkaline-degraded, and repolished surfaces. The superficial layer degraded by alkaline immersion (degraded layer) was ground off from the sample surface. After removing the degraded layer, the surface was polished with aluminum oxide powder (1.0 µm and 0.3 µm), to create a repolished specimen. Scanning electron microscopy observations were made of the specimens.The results were compared with those for Omnichroma (OC) from a previous study. All the materials showed different responses to degradation and repolishing, but repolishing of AP-X, for surface roughness and gloss, was more effective at restoring pre-degradation properties. Repolishing effectively removed discoloration in all materials.RESULTS The results were compared with those for Omnichroma (OC) from a previous study. All the materials showed different responses to degradation and repolishing, but repolishing of AP-X, for surface roughness and gloss, was more effective at restoring pre-degradation properties. Repolishing effectively removed discoloration in all materials.The materials tested showed different responses to degradation and repolishing, but repolishing of AP-X, for surface roughness and gloss, was more effective at restoring pre-degradation properties. Repolishing effectively removed discoloration in all materials.CLINICAL SIGNIFICANCE The materials tested showed different responses to degradation and repolishing, but repolishing of AP-X, for surface roughness and gloss, was more effective at restoring pre-degradation properties. Repolishing effectively removed discoloration in all materials.
Details
- Title: Subtitle
- Comparison of surface properties of universal shade and conventional resin-based composites after degradation and repolishing
- Creators
- Mayumi MaesakoNagisa MatsuiMorioki FujitaniFranklin Garcia-GodoyAkimasa Tsujimoto
- Resource Type
- Journal article
- Publication Details
- American journal of dentistry, Vol.37(3), pp.147-153
- Publisher
- MOSHER & LINDER, INC
- PMID
- 38899995
- ISSN
- 0894-8275
- Grant note
- JSPS KAKENHI: 23K16011
The authors declared no conflict of interest. This work was supported by JSPS KAKENHI (Grant-in-Aid for Early-Career Scientists) Grant Number 23K16011.
- Language
- English
- Date published
- 06/01/2024
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984643757102771
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