Martens Hardness of CAD/CAM Resin-Based Composites
(1) Background: The properties of CAD/CAM resin-based composites differ due to differences in their composition. Instrumented indentation testing can help to analyze these differences with respect to hardness, as well as energy-converting capabilities due to viscoelastic behavior. (2) Methods: Eleve...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/15/7698 |
| _version_ | 1827603258072367104 |
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| author | Martin Rosentritt Sebastian Hahnel Sibylle Schneider-Feyrer Thomas Strasser Alois Schmid |
| author_facet | Martin Rosentritt Sebastian Hahnel Sibylle Schneider-Feyrer Thomas Strasser Alois Schmid |
| author_sort | Martin Rosentritt |
| collection | DOAJ |
| description | (1) Background: The properties of CAD/CAM resin-based composites differ due to differences in their composition. Instrumented indentation testing can help to analyze these differences with respect to hardness, as well as energy-converting capabilities due to viscoelastic behavior. (2) Methods: Eleven materials were investigated using instrumented indentation testing. Indentation depth (h<sub>r</sub>), Martens hardness (H<sub>M</sub>), indentation hardness (H<sub>IT</sub>), indentation modulus (E<sub>IT</sub>), the elastic part of indentation work (η<sub>IT</sub>), and indentation creep (C<sub>IT</sub>) were investigated, and statistical analysis was performed using one-way ANOVA, Bonferroni post-hoc test, and Pearson correlation (α = 0.05). (3) Results: All of the investigated parameters revealed differences between the analyzed materials. Besides the differences in hardness-associated parameters (h<sub>r</sub>, H<sub>M</sub>, and H<sub>IT</sub>), instrumented indentation testing demonstrated differences in energy-converting properties. The subsequent one-way ANOVA revealed significant differences (<i>p</i> < 0.001). A significant (<i>p</i> < 0.01, Pearson correlation >0.576) correlation between the materials and H<sub>M</sub>, H<sub>IT</sub>, or E<sub>IT</sub> was identified. (4) Conclusions: Due to the differences found in the energy-converting properties of the investigated materials, certain CAD/CAM resin-based composites could show superior stress-breaking capabilities than others. The consequential reduction in stress build-up may prove to beneficial, especially for implant-retained restorations or patients suffering from parafunctions. |
| first_indexed | 2024-03-09T05:35:29Z |
| format | Article |
| id | doaj.art-56cf221b71b740d6a51e33be3b75ceb8 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:35:29Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-56cf221b71b740d6a51e33be3b75ceb82023-12-03T12:28:46ZengMDPI AGApplied Sciences2076-34172022-07-011215769810.3390/app12157698Martens Hardness of CAD/CAM Resin-Based CompositesMartin Rosentritt0Sebastian Hahnel1Sibylle Schneider-Feyrer2Thomas Strasser3Alois Schmid4Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, GermanyDepartment of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, GermanyDepartment of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, GermanyDepartment of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, GermanyDepartment of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, Germany(1) Background: The properties of CAD/CAM resin-based composites differ due to differences in their composition. Instrumented indentation testing can help to analyze these differences with respect to hardness, as well as energy-converting capabilities due to viscoelastic behavior. (2) Methods: Eleven materials were investigated using instrumented indentation testing. Indentation depth (h<sub>r</sub>), Martens hardness (H<sub>M</sub>), indentation hardness (H<sub>IT</sub>), indentation modulus (E<sub>IT</sub>), the elastic part of indentation work (η<sub>IT</sub>), and indentation creep (C<sub>IT</sub>) were investigated, and statistical analysis was performed using one-way ANOVA, Bonferroni post-hoc test, and Pearson correlation (α = 0.05). (3) Results: All of the investigated parameters revealed differences between the analyzed materials. Besides the differences in hardness-associated parameters (h<sub>r</sub>, H<sub>M</sub>, and H<sub>IT</sub>), instrumented indentation testing demonstrated differences in energy-converting properties. The subsequent one-way ANOVA revealed significant differences (<i>p</i> < 0.001). A significant (<i>p</i> < 0.01, Pearson correlation >0.576) correlation between the materials and H<sub>M</sub>, H<sub>IT</sub>, or E<sub>IT</sub> was identified. (4) Conclusions: Due to the differences found in the energy-converting properties of the investigated materials, certain CAD/CAM resin-based composites could show superior stress-breaking capabilities than others. The consequential reduction in stress build-up may prove to beneficial, especially for implant-retained restorations or patients suffering from parafunctions.https://www.mdpi.com/2076-3417/12/15/7698CAD/CAMresin compositehardnessinstrumented indentation testing |
| spellingShingle | Martin Rosentritt Sebastian Hahnel Sibylle Schneider-Feyrer Thomas Strasser Alois Schmid Martens Hardness of CAD/CAM Resin-Based Composites Applied Sciences CAD/CAM resin composite hardness instrumented indentation testing |
| title | Martens Hardness of CAD/CAM Resin-Based Composites |
| title_full | Martens Hardness of CAD/CAM Resin-Based Composites |
| title_fullStr | Martens Hardness of CAD/CAM Resin-Based Composites |
| title_full_unstemmed | Martens Hardness of CAD/CAM Resin-Based Composites |
| title_short | Martens Hardness of CAD/CAM Resin-Based Composites |
| title_sort | martens hardness of cad cam resin based composites |
| topic | CAD/CAM resin composite hardness instrumented indentation testing |
| url | https://www.mdpi.com/2076-3417/12/15/7698 |
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