Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?
The aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm<sup>3</sup>) were forwarded to irradiation with an indu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/8/1271 |
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| author | Andreas Koenig Leonie Schmohl Johannes Scheffler Florian Fuchs Michaela Schulz-Siegmund Hans-Martin Doerfler Steffen Jankuhn Sebastian Hahnel |
| author_facet | Andreas Koenig Leonie Schmohl Johannes Scheffler Florian Fuchs Michaela Schulz-Siegmund Hans-Martin Doerfler Steffen Jankuhn Sebastian Hahnel |
| author_sort | Andreas Koenig |
| collection | DOAJ |
| description | The aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm<sup>3</sup>) were forwarded to irradiation with an industrial tomograph. Using three-dimensional datasets, the porosity of the materials was quantified and flexural strength was investigated prior to and after irradiation. The thermal properties of irradiated and unirradiated materials were analysed and compared by means of differential scanning calorimetry (DSC). Single µXCT measurements led to a significant decrease in flexural strength of polycarbonate with acrylnitril-butadien-styrol (PC-ABS). No significant influence in flexural strength was identified for resin-based composites (RBCs), poly(methyl methacrylate) (PMMA), and zinc phosphate cement (HAR) after a single irradiation by measurement. However, DSC results suggest that changes in the microstructure of PMMA are possible with increasing radiation doses (multiple measurements, longer measurements, higher output power from the X-ray tube). In summary, it must be assumed that X-ray radiation during µXCT measurement at high doses can lead to changes in the structure and properties of certain polymers. |
| first_indexed | 2024-03-10T12:20:03Z |
| format | Article |
| id | doaj.art-28faffeebeec478e8b6051b114aae296 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T12:20:03Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-28faffeebeec478e8b6051b114aae2962023-11-21T15:33:41ZengMDPI AGPolymers2073-43602021-04-01138127110.3390/polym13081271Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?Andreas Koenig0Leonie Schmohl1Johannes Scheffler2Florian Fuchs3Michaela Schulz-Siegmund4Hans-Martin Doerfler5Steffen Jankuhn6Sebastian Hahnel7Department of Dental Prosthetics and Materials Science, Leipzig University, 04103 Leipzig, GermanyDepartment of Dental Prosthetics and Materials Science, Leipzig University, 04103 Leipzig, GermanyInstitute of Chemical Technology, Leipzig University, 04103 Leipzig, GermanyDepartment of Dental Prosthetics and Materials Science, Leipzig University, 04103 Leipzig, GermanyInstitute of Pharmacy, Pharmaceutical Technology, Leipzig University, 04317 Leipzig, GermanyDepartment of Mechanical and Energy Engineering, University of Applied Sciences, 04277 Leipzig, GermanyFelix Bloch Institute of Solid State Physics, Leipzig University, 04103 Leipzig, GermanyDepartment of Dental Prosthetics and Materials Science, Leipzig University, 04103 Leipzig, GermanyThe aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm<sup>3</sup>) were forwarded to irradiation with an industrial tomograph. Using three-dimensional datasets, the porosity of the materials was quantified and flexural strength was investigated prior to and after irradiation. The thermal properties of irradiated and unirradiated materials were analysed and compared by means of differential scanning calorimetry (DSC). Single µXCT measurements led to a significant decrease in flexural strength of polycarbonate with acrylnitril-butadien-styrol (PC-ABS). No significant influence in flexural strength was identified for resin-based composites (RBCs), poly(methyl methacrylate) (PMMA), and zinc phosphate cement (HAR) after a single irradiation by measurement. However, DSC results suggest that changes in the microstructure of PMMA are possible with increasing radiation doses (multiple measurements, longer measurements, higher output power from the X-ray tube). In summary, it must be assumed that X-ray radiation during µXCT measurement at high doses can lead to changes in the structure and properties of certain polymers.https://www.mdpi.com/2073-4360/13/8/1271dental materialsionising radiationmicro-CTµXCTX-ray radiationDSC |
| spellingShingle | Andreas Koenig Leonie Schmohl Johannes Scheffler Florian Fuchs Michaela Schulz-Siegmund Hans-Martin Doerfler Steffen Jankuhn Sebastian Hahnel Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? Polymers dental materials ionising radiation micro-CT µXCT X-ray radiation DSC |
| title | Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? |
| title_full | Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? |
| title_fullStr | Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? |
| title_full_unstemmed | Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? |
| title_short | Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials? |
| title_sort | is micro x ray computer tomography a suitable non destructive method for the characterisation of dental materials |
| topic | dental materials ionising radiation micro-CT µXCT X-ray radiation DSC |
| url | https://www.mdpi.com/2073-4360/13/8/1271 |
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