Microstructural investigation of hybrid CAD/CAM restorative dental materials by micro-CT and SEM
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866910483999621120 |
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| author | Prause, Elisabeth Hey, Jeremias Beuer, Florian Yassine, Jamila Hesse, Bernhard Weitkamp, Timm Gerber, Javier Schmidt, Franziska |
| author_facet | Prause, Elisabeth Hey, Jeremias Beuer, Florian Yassine, Jamila Hesse, Bernhard Weitkamp, Timm Gerber, Javier Schmidt, Franziska |
| contents | Objectives: An increasing number of CAD/CAM (computer-aided design/computer-aided manufacturing) hybrid materials have been introduced to the dental market in recent years. In addition, CAD/CAM hybrid materials for additive manufacturing (AM) are becoming more attractive in digital dentistry. Studies on material microstructures using micro-computed tomography ($μ$-CT) combined with scanning electron microscopy (SEM) have only been available to a limited extent so far.
Methods: One CAD/CAM three-dimensional- (3D-) printable hybrid material (VarseoSmile Crown plus) and two CAD/CAM millable hybrid materials (Vita Enamic; Voco Grandio), as well as one direct composite material (Ceram.x duo), were included in the present study. Cylindrical samples with a diameter of 2 mm were produced from each material and investigated by means of synchrotron radiation $μ$-CT at a voxel size of 0.65 $μ$m. Different samples from the same materials, obtained by cutting and polishing, were investigated by SEM.
Results: The 3D-printed hybrid material showed some agglomerations and a more irregular distribution of fillers, as well as a visible layered macrostructure and a few spherical pores due to the printing process. The CAD/CAM millable hybrid materials revealed a more homogenous distribution of ceramic particles. The direct composite material showed multiple air bubbles and microstructural irregularities based on manual processing.
Significance: The $μ$-CT and SEM analysis of the materials revealed different microstructures even though they belong to the same class of materials. It could be shown that $μ$-CT and SEM imaging are valuable tools to understand microstructure and related mechanical properties of materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_07341 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Microstructural investigation of hybrid CAD/CAM restorative dental materials by micro-CT and SEM Prause, Elisabeth Hey, Jeremias Beuer, Florian Yassine, Jamila Hesse, Bernhard Weitkamp, Timm Gerber, Javier Schmidt, Franziska Medical Physics Materials Science Applied Physics Objectives: An increasing number of CAD/CAM (computer-aided design/computer-aided manufacturing) hybrid materials have been introduced to the dental market in recent years. In addition, CAD/CAM hybrid materials for additive manufacturing (AM) are becoming more attractive in digital dentistry. Studies on material microstructures using micro-computed tomography ($μ$-CT) combined with scanning electron microscopy (SEM) have only been available to a limited extent so far. Methods: One CAD/CAM three-dimensional- (3D-) printable hybrid material (VarseoSmile Crown plus) and two CAD/CAM millable hybrid materials (Vita Enamic; Voco Grandio), as well as one direct composite material (Ceram.x duo), were included in the present study. Cylindrical samples with a diameter of 2 mm were produced from each material and investigated by means of synchrotron radiation $μ$-CT at a voxel size of 0.65 $μ$m. Different samples from the same materials, obtained by cutting and polishing, were investigated by SEM. Results: The 3D-printed hybrid material showed some agglomerations and a more irregular distribution of fillers, as well as a visible layered macrostructure and a few spherical pores due to the printing process. The CAD/CAM millable hybrid materials revealed a more homogenous distribution of ceramic particles. The direct composite material showed multiple air bubbles and microstructural irregularities based on manual processing. Significance: The $μ$-CT and SEM analysis of the materials revealed different microstructures even though they belong to the same class of materials. It could be shown that $μ$-CT and SEM imaging are valuable tools to understand microstructure and related mechanical properties of materials. |
| title | Microstructural investigation of hybrid CAD/CAM restorative dental materials by micro-CT and SEM |
| topic | Medical Physics Materials Science Applied Physics |
| url | https://arxiv.org/abs/2308.07341 |