Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks
Objective: This study aimed to compare the fracture resistance of endocrowns fabricated from three different computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic materials.Methods: A maxillary left first molar of a typodont model was scanned using an intraoral scanner both before and...
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Mashhad University of Medical Sciences
2025-06-01
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| Series: | Journal of Dental Materials and Techniques |
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| Online Access: | https://jdmt.mums.ac.ir/article_26206_eac5d86e099fad40d59f21056e7c34af.pdf |
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| author | Maryam Ansari Marzieh Alikhasi Negin Yaghoobi Nikfam Khoshkhounejad |
| author_facet | Maryam Ansari Marzieh Alikhasi Negin Yaghoobi Nikfam Khoshkhounejad |
| author_sort | Maryam Ansari |
| collection | DOAJ |
| description | Objective: This study aimed to compare the fracture resistance of endocrowns fabricated from three different computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic materials.Methods: A maxillary left first molar of a typodont model was scanned using an intraoral scanner both before and after standardized endocrown preparation. The scan of the prepared tooth was used to fabricate thirty-six identical resin dies through three-dimensional printing. These dies were then assigned to three groups (n=12), each corresponding to a different CAD/CAM ceramic material: IPS e.max CAD, VITA Suprinity, and VITA Enamic. Endocrowns were digitally designed and milled for each group using a CAD/CAM system. They were then cemented onto the resin dies with dual-cure resin cement and subjected to 5000 thermal cycles. A compressive load was applied to each specimen at a 35° angle to the palatal cusp using a universal testing machine until fracture occurred. Fracture resistance values were recorded in Newtons, and failure modes were evaluated by a stereomicroscope. Statistical analysis was performed using the Kruskal-Wallis, Mann-Whitney U, and Bonferroni tests (P<0.05).Results: A statistically significant difference was found in the fracture resistance among the three groups (P=0.01). The IPS e.max CAD group exhibited significantly higher fracture resistance compared to the VITA Enamic group (P=0.01). No statistically significant difference was observed in failure modes across the groups (P>0.05).Conclusions: Endocrowns fabricated from IPS e.max CAD demonstrated the highest fracture resistance with no cases of catastrophic failure. VITA Suprinity endocrowns showed the second-highest fracture resistance, with only one case of catastrophic fracture. |
| format | Article |
| id | doaj-art-b586a6a75a4447b39f6d9b624ea3cfcf |
| institution | DOAJ |
| issn | 2322-4150 2252-0317 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Mashhad University of Medical Sciences |
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| series | Journal of Dental Materials and Techniques |
| spelling | doaj-art-b586a6a75a4447b39f6d9b624ea3cfcf2025-08-20T03:16:56ZengMashhad University of Medical SciencesJournal of Dental Materials and Techniques2322-41502252-03172025-06-011429510110.22038/jdmt.2025.86409.179526206Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocksMaryam Ansari0Marzieh Alikhasi1Negin Yaghoobi2Nikfam Khoshkhounejad3School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranDepartment of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranDepartment of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranObjective: This study aimed to compare the fracture resistance of endocrowns fabricated from three different computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic materials.Methods: A maxillary left first molar of a typodont model was scanned using an intraoral scanner both before and after standardized endocrown preparation. The scan of the prepared tooth was used to fabricate thirty-six identical resin dies through three-dimensional printing. These dies were then assigned to three groups (n=12), each corresponding to a different CAD/CAM ceramic material: IPS e.max CAD, VITA Suprinity, and VITA Enamic. Endocrowns were digitally designed and milled for each group using a CAD/CAM system. They were then cemented onto the resin dies with dual-cure resin cement and subjected to 5000 thermal cycles. A compressive load was applied to each specimen at a 35° angle to the palatal cusp using a universal testing machine until fracture occurred. Fracture resistance values were recorded in Newtons, and failure modes were evaluated by a stereomicroscope. Statistical analysis was performed using the Kruskal-Wallis, Mann-Whitney U, and Bonferroni tests (P<0.05).Results: A statistically significant difference was found in the fracture resistance among the three groups (P=0.01). The IPS e.max CAD group exhibited significantly higher fracture resistance compared to the VITA Enamic group (P=0.01). No statistically significant difference was observed in failure modes across the groups (P>0.05).Conclusions: Endocrowns fabricated from IPS e.max CAD demonstrated the highest fracture resistance with no cases of catastrophic failure. VITA Suprinity endocrowns showed the second-highest fracture resistance, with only one case of catastrophic fracture.https://jdmt.mums.ac.ir/article_26206_eac5d86e099fad40d59f21056e7c34af.pdfcomputer-aided designdental porcelaindental prosthesisdental restoration failurefracture resistanceips e.max ceram |
| spellingShingle | Maryam Ansari Marzieh Alikhasi Negin Yaghoobi Nikfam Khoshkhounejad Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks Journal of Dental Materials and Techniques computer-aided design dental porcelain dental prosthesis dental restoration failure fracture resistance ips e.max ceram |
| title | Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks |
| title_full | Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks |
| title_fullStr | Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks |
| title_full_unstemmed | Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks |
| title_short | Comparative assessment of the fracture resistance of endocrowns fabricated from three different CAD/CAM ceramic blocks |
| title_sort | comparative assessment of the fracture resistance of endocrowns fabricated from three different cad cam ceramic blocks |
| topic | computer-aided design dental porcelain dental prosthesis dental restoration failure fracture resistance ips e.max ceram |
| url | https://jdmt.mums.ac.ir/article_26206_eac5d86e099fad40d59f21056e7c34af.pdf |
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