Inner marginal strength of CAD/CAM materials is not affected by machining protocol
Purpose Here we aimed to compare two machining strategies regarding the marginal strength of CAD/CAM materials using a hoop-strength test in model sphero-cylindrical dental crowns, coupled with finite element analysis. Materials and Methods Five CAD/CAM materials indicated for single posterior crown...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-01-01
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| Series: | Biomaterial Investigations in Dentistry |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/26415275.2021.1964969 |
| _version_ | 1798024145469964288 |
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| author | Julia Lubauer Renan Belli Fernanda H. Schünemann Ragai E. Matta Manfred Wichmann Sandro Wartzack Harald Völkl Anselm Petschelt Ulrich Lohbauer |
| author_facet | Julia Lubauer Renan Belli Fernanda H. Schünemann Ragai E. Matta Manfred Wichmann Sandro Wartzack Harald Völkl Anselm Petschelt Ulrich Lohbauer |
| author_sort | Julia Lubauer |
| collection | DOAJ |
| description | Purpose Here we aimed to compare two machining strategies regarding the marginal strength of CAD/CAM materials using a hoop-strength test in model sphero-cylindrical dental crowns, coupled with finite element analysis. Materials and Methods Five CAD/CAM materials indicated for single posterior crowns were selected, including a lithium disilicate (IPS e.max® CAD), a lithium (di)silicate (Suprinity® PC), a polymer-infiltrated ceramic scaffold (Enamic®), and two indirect resin composites (Grandio® Blocs and Lava™ Ultimate). A sphero-cylindrical model crown was built on CAD Software onto a geometrical abutment and machined using a Cerec MC XL system according to the two available protocols: rough-fast and fine-slow. Specimens were fractured using a novel hoop-strength test and analyzed using the finite element method to obtain the inner marginal strength. Data were evaluated using Weibull statistics. Results Machining strategy did not affect the marginal strength of any restorative material tested here. Ceramic materials showed a higher density of chippings in the outer margin, but this did not reduce inner marginal strength. IPS e.max® CAD showed the statistically highest marginal strength, and Enamic® and Lava™ Ultimate were the lowest. Grandio® Blocs showed higher performance than Suprinity® PC. Conclusions The rough-fast machining strategy available in Cerec MC XL does not degrade the marginal strength of the evaluated CAD/CAD materials when compared to its fine-fast machining strategy. Depending on the material, resin composites have the potential to perform better than some glass-ceramic materials. |
| first_indexed | 2024-04-11T17:57:41Z |
| format | Article |
| id | doaj.art-832ed3c0648e4d869cff2b1f5031f22f |
| institution | Directory Open Access Journal |
| issn | 2641-5275 |
| language | English |
| last_indexed | 2024-04-11T17:57:41Z |
| publishDate | 2021-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Biomaterial Investigations in Dentistry |
| spelling | doaj.art-832ed3c0648e4d869cff2b1f5031f22f2022-12-22T04:10:37ZengTaylor & Francis GroupBiomaterial Investigations in Dentistry2641-52752021-01-018111912810.1080/26415275.2021.19649691964969Inner marginal strength of CAD/CAM materials is not affected by machining protocolJulia Lubauer0Renan Belli1Fernanda H. Schünemann2Ragai E. Matta3Manfred Wichmann4Sandro Wartzack5Harald Völkl6Anselm Petschelt7Ulrich Lohbauer8Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 1 – Zahnerhaltung und Parodontologie, Forschungslabor für dentale BiomaterialienFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 1 – Zahnerhaltung und Parodontologie, Forschungslabor für dentale BiomaterialienPost-Graduate Program in Dentistry (PPGO), School of Dentistry, Federal University of Santa CatarinaFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 2 – Prothetik, Labor für digitale ZahnmedizinFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 2 – Prothetik, Labor für digitale ZahnmedizinFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Lehrstuhl für KonstruktionstechnikFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Lehrstuhl für KonstruktionstechnikFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 1 – Zahnerhaltung und Parodontologie, Forschungslabor für dentale BiomaterialienFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 1 – Zahnerhaltung und Parodontologie, Forschungslabor für dentale BiomaterialienPurpose Here we aimed to compare two machining strategies regarding the marginal strength of CAD/CAM materials using a hoop-strength test in model sphero-cylindrical dental crowns, coupled with finite element analysis. Materials and Methods Five CAD/CAM materials indicated for single posterior crowns were selected, including a lithium disilicate (IPS e.max® CAD), a lithium (di)silicate (Suprinity® PC), a polymer-infiltrated ceramic scaffold (Enamic®), and two indirect resin composites (Grandio® Blocs and Lava™ Ultimate). A sphero-cylindrical model crown was built on CAD Software onto a geometrical abutment and machined using a Cerec MC XL system according to the two available protocols: rough-fast and fine-slow. Specimens were fractured using a novel hoop-strength test and analyzed using the finite element method to obtain the inner marginal strength. Data were evaluated using Weibull statistics. Results Machining strategy did not affect the marginal strength of any restorative material tested here. Ceramic materials showed a higher density of chippings in the outer margin, but this did not reduce inner marginal strength. IPS e.max® CAD showed the statistically highest marginal strength, and Enamic® and Lava™ Ultimate were the lowest. Grandio® Blocs showed higher performance than Suprinity® PC. Conclusions The rough-fast machining strategy available in Cerec MC XL does not degrade the marginal strength of the evaluated CAD/CAD materials when compared to its fine-fast machining strategy. Depending on the material, resin composites have the potential to perform better than some glass-ceramic materials.http://dx.doi.org/10.1080/26415275.2021.1964969cad/camstrengthfinite element |
| spellingShingle | Julia Lubauer Renan Belli Fernanda H. Schünemann Ragai E. Matta Manfred Wichmann Sandro Wartzack Harald Völkl Anselm Petschelt Ulrich Lohbauer Inner marginal strength of CAD/CAM materials is not affected by machining protocol Biomaterial Investigations in Dentistry cad/cam strength finite element |
| title | Inner marginal strength of CAD/CAM materials is not affected by machining protocol |
| title_full | Inner marginal strength of CAD/CAM materials is not affected by machining protocol |
| title_fullStr | Inner marginal strength of CAD/CAM materials is not affected by machining protocol |
| title_full_unstemmed | Inner marginal strength of CAD/CAM materials is not affected by machining protocol |
| title_short | Inner marginal strength of CAD/CAM materials is not affected by machining protocol |
| title_sort | inner marginal strength of cad cam materials is not affected by machining protocol |
| topic | cad/cam strength finite element |
| url | http://dx.doi.org/10.1080/26415275.2021.1964969 |
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