Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved]
Background This study examined the effect of thermocycling on the flexural strength properties of four CAD/CAM ceramic materials at different thicknesses. Methods Four CAD/CAM ceramics of different types: advanced lithium disilicate (ALD), zirconia-reinforced lithium silicate (ZLS) lithium disilicat...
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F1000 Research Ltd
2025-08-01
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| Online Access: | https://f1000research.com/articles/13-1310/v3 |
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| author | Shahad T. Alameer Laila Al Dehailan Sultan Akhtar Turki Alshehri Nourhan M. Aly Yousif A. Al-Dulaijan Passent Ellakany |
| author_facet | Shahad T. Alameer Laila Al Dehailan Sultan Akhtar Turki Alshehri Nourhan M. Aly Yousif A. Al-Dulaijan Passent Ellakany |
| author_sort | Shahad T. Alameer |
| collection | DOAJ |
| description | Background This study examined the effect of thermocycling on the flexural strength properties of four CAD/CAM ceramic materials at different thicknesses. Methods Four CAD/CAM ceramics of different types: advanced lithium disilicate (ALD), zirconia-reinforced lithium silicate (ZLS) lithium disilicate (LD), and leucite reinforced (LE), and at three varying thicknesses 0.5, 1.0 and 1.5 mm were examined. After subjecting all specimens to 5000 thermal cycles, flexural strength was determined using a universal testing apparatus. Scanning electron microscopy (SEM) was employed for analysis. Two factorial ANOVA models assessed the association of different factors (ceramic type and thickness) with flexural strength and elastic modulus. The 95% confidence intervals (CIs) and adjusted means were computed. A p-value < 0.05 was designated significant. Results ZLS exhibited the highest flexural strength at 1.5 mm thickness, while LD showed the highest Young’s modulus of elasticity. The lowest flexural strength was observed in the 0.5 mm thickness group of all tested groups. There were notable variations in flexural strength across all ceramic materials, with the highest adjusted mean strength in the ZLS group, ALD, LD, and LE, respectively. Additionally, significant differences were noted in ceramic thickness, with 1.5 mm thickness showing the highest strength and 0.5 mm thickness the lowest. Conclusions Ceramic material thickness significantly impacts flexural strength, with 1.5 mm thickness deemed suitable for posterior restorations. Ceramic materials with zirconia fillers or matrix demonstrated higher flexural strength than other ceramics. |
| format | Article |
| id | doaj-art-27a25eed00d6468da41899a91d7a9d16 |
| institution | Kabale University |
| issn | 2046-1402 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | F1000 Research Ltd |
| record_format | Article |
| series | F1000Research |
| spelling | doaj-art-27a25eed00d6468da41899a91d7a9d162025-08-20T03:36:58ZengF1000 Research LtdF1000Research2046-14022025-08-011310.12688/f1000research.157128.3185985Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved]Shahad T. Alameer0https://orcid.org/0009-0001-5469-3493Laila Al Dehailan1https://orcid.org/0000-0002-1240-7022Sultan Akhtar2Turki Alshehri3https://orcid.org/0000-0001-7575-1587Nourhan M. Aly4Yousif A. Al-Dulaijan5https://orcid.org/0000-0002-8180-8903Passent Ellakany6https://orcid.org/0000-0002-2995-8111Imam Abdulrahman Bin Faisal University College of Dentistry, Dammam, Eastern Province, 31441, Saudi ArabiaDepartment of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Eastern Province, 31441, Saudi ArabiaDepartment of Biophysics Research, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, Eastern Province, 31441, Saudi ArabiaDepartment of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Eastern Province, 31441, Saudi ArabiaPediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria, Alexandria Governorate, 21527, EgyptDepartment of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Eastern Province, 31441, Saudi ArabiaDivision of Prosthodontics, School of Dentistry, The University of Alabama at Birmingham, Birmingham, AL 35209, USABackground This study examined the effect of thermocycling on the flexural strength properties of four CAD/CAM ceramic materials at different thicknesses. Methods Four CAD/CAM ceramics of different types: advanced lithium disilicate (ALD), zirconia-reinforced lithium silicate (ZLS) lithium disilicate (LD), and leucite reinforced (LE), and at three varying thicknesses 0.5, 1.0 and 1.5 mm were examined. After subjecting all specimens to 5000 thermal cycles, flexural strength was determined using a universal testing apparatus. Scanning electron microscopy (SEM) was employed for analysis. Two factorial ANOVA models assessed the association of different factors (ceramic type and thickness) with flexural strength and elastic modulus. The 95% confidence intervals (CIs) and adjusted means were computed. A p-value < 0.05 was designated significant. Results ZLS exhibited the highest flexural strength at 1.5 mm thickness, while LD showed the highest Young’s modulus of elasticity. The lowest flexural strength was observed in the 0.5 mm thickness group of all tested groups. There were notable variations in flexural strength across all ceramic materials, with the highest adjusted mean strength in the ZLS group, ALD, LD, and LE, respectively. Additionally, significant differences were noted in ceramic thickness, with 1.5 mm thickness showing the highest strength and 0.5 mm thickness the lowest. Conclusions Ceramic material thickness significantly impacts flexural strength, with 1.5 mm thickness deemed suitable for posterior restorations. Ceramic materials with zirconia fillers or matrix demonstrated higher flexural strength than other ceramics.https://f1000research.com/articles/13-1310/v3 CAD/CAM Ceramics Flexural Strength Thickness Compositioneng |
| spellingShingle | Shahad T. Alameer Laila Al Dehailan Sultan Akhtar Turki Alshehri Nourhan M. Aly Yousif A. Al-Dulaijan Passent Ellakany Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] F1000Research CAD/CAM Ceramics Flexural Strength Thickness Composition eng |
| title | Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] |
| title_full | Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] |
| title_fullStr | Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] |
| title_full_unstemmed | Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] |
| title_short | Effect of thermocycling on flexural strength of dental CAD/CAM ceramics of variable thicknesses and structures: an in vitro study [version 3; peer review: 1 approved, 2 approved with reservations, 1 not approved] |
| title_sort | effect of thermocycling on flexural strength of dental cad cam ceramics of variable thicknesses and structures an in vitro study version 3 peer review 1 approved 2 approved with reservations 1 not approved |
| topic | CAD/CAM Ceramics Flexural Strength Thickness Composition eng |
| url | https://f1000research.com/articles/13-1310/v3 |
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