The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials
Abstract In-office bleaching, using hydrogen peroxide, is effective to remove dental enamel stains. However, bleaching agents can deteriorate surface properties of CAD-CAM materials. This in vitro study aimed to investigate the effect of in-office bleaching agents on Vickers hardness and surface top...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-09-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-42415-4 |
| _version_ | 1797453089065664512 |
|---|---|
| author | Rasha A. Alamoush Jiawei Yang Abdulaziz Alhotan Julfikar Haider Jukka P. Matinlinna Alaaeldin Elraggal |
| author_facet | Rasha A. Alamoush Jiawei Yang Abdulaziz Alhotan Julfikar Haider Jukka P. Matinlinna Alaaeldin Elraggal |
| author_sort | Rasha A. Alamoush |
| collection | DOAJ |
| description | Abstract In-office bleaching, using hydrogen peroxide, is effective to remove dental enamel stains. However, bleaching agents can deteriorate surface properties of CAD-CAM materials. This in vitro study aimed to investigate the effect of in-office bleaching agents on Vickers hardness and surface topography of polished and unpolished dental CAD-CAM composite materials (Grandio blocs, Lava Ultimate, BRILLIANT Crios, Cerasmart), and a polymer-infiltrated ceramic network block (Vita Enamic). The specimens were randomly divided into two groups: unpolished or polished. The micro-hardness and surface topography of each group were measured before bleaching, after a 60 min bleaching period, and 24-h and one-month post-bleaching. In-office bleaching significantly influenced the Vickers hardness of both the polished and unpolished CAD/CAM composite blocks, with Vita Enamic exhibiting the least hardness stability among all groups. Furthermore, in-office bleaching significantly influenced the surface roughness of unpolished CAD/CAM composite blocks. There was a significant difference in hardness reduction between the polished and unpolished specimens for most of the investigated materials at different time points. The bleaching did not influence the surface roughness of the investigated polished group, except for Vita Enamic and Lava Ultimate. However, it did influence the surface roughness of the investigated materials in the unpolished group. |
| first_indexed | 2024-03-09T15:17:54Z |
| format | Article |
| id | doaj.art-d1346c8fa71041b29366c574818c8400 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T15:17:54Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d1346c8fa71041b29366c574818c84002023-11-26T12:59:23ZengNature PortfolioScientific Reports2045-23222023-09-0113111210.1038/s41598-023-42415-4The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materialsRasha A. Alamoush0Jiawei Yang1Abdulaziz Alhotan2Julfikar Haider3Jukka P. Matinlinna4Alaaeldin Elraggal5Department of Fixed and Removable Prosthodontics, School of Dentistry, The University of JordanDepartment of Prosthodontics, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of MedicineDepartment of Dental Health, College of Applied Medical Sciences, King Saud UniversityDepartment of Engineering, Manchester Metropolitan UniversityDivision of Dentistry, School of Medical Sciences, The University of ManchesterOperative Dentistry, Conservative Dentistry Department, Faculty of Dentistry, Alexandria UniversityAbstract In-office bleaching, using hydrogen peroxide, is effective to remove dental enamel stains. However, bleaching agents can deteriorate surface properties of CAD-CAM materials. This in vitro study aimed to investigate the effect of in-office bleaching agents on Vickers hardness and surface topography of polished and unpolished dental CAD-CAM composite materials (Grandio blocs, Lava Ultimate, BRILLIANT Crios, Cerasmart), and a polymer-infiltrated ceramic network block (Vita Enamic). The specimens were randomly divided into two groups: unpolished or polished. The micro-hardness and surface topography of each group were measured before bleaching, after a 60 min bleaching period, and 24-h and one-month post-bleaching. In-office bleaching significantly influenced the Vickers hardness of both the polished and unpolished CAD/CAM composite blocks, with Vita Enamic exhibiting the least hardness stability among all groups. Furthermore, in-office bleaching significantly influenced the surface roughness of unpolished CAD/CAM composite blocks. There was a significant difference in hardness reduction between the polished and unpolished specimens for most of the investigated materials at different time points. The bleaching did not influence the surface roughness of the investigated polished group, except for Vita Enamic and Lava Ultimate. However, it did influence the surface roughness of the investigated materials in the unpolished group.https://doi.org/10.1038/s41598-023-42415-4 |
| spellingShingle | Rasha A. Alamoush Jiawei Yang Abdulaziz Alhotan Julfikar Haider Jukka P. Matinlinna Alaaeldin Elraggal The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials Scientific Reports |
| title | The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials |
| title_full | The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials |
| title_fullStr | The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials |
| title_full_unstemmed | The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials |
| title_short | The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials |
| title_sort | effect of in office bleaching agents on the vickers hardness and surface topography of polished and unpolished cad cam composite materials |
| url | https://doi.org/10.1038/s41598-023-42415-4 |
| work_keys_str_mv | AT rashaaalamoush theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT jiaweiyang theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT abdulazizalhotan theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT julfikarhaider theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT jukkapmatinlinna theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT alaaeldinelraggal theeffectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT rashaaalamoush effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT jiaweiyang effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT abdulazizalhotan effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT julfikarhaider effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT jukkapmatinlinna effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials AT alaaeldinelraggal effectofinofficebleachingagentsonthevickershardnessandsurfacetopographyofpolishedandunpolishedcadcamcompositematerials |