Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study
Background: The advancement of digital dentistry enhanced the fabrication of indirect provisional restorations utilizing durable materials, yet the performance of provisional crowns fabricated with various techniques, and different thickness remains unknown. Thus, this in-vitro study aimed to evalua...
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| Language: | English |
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Springer
2023-12-01
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| Series: | Saudi Dental Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S101390522300144X |
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| author | Majed M. Alsarani |
| author_facet | Majed M. Alsarani |
| author_sort | Majed M. Alsarani |
| collection | DOAJ |
| description | Background: The advancement of digital dentistry enhanced the fabrication of indirect provisional restorations utilizing durable materials, yet the performance of provisional crowns fabricated with various techniques, and different thickness remains unknown. Thus, this in-vitro study aimed to evaluate the influence of restoration thickness and aging on the fracture behavior of provisional crowns fabricated using different techniques. Methods: A dentiform maxillary first molar was prepared using a highly filled epoxy resin material to construct identical die replicas. Four groups of provisional crowns were fabricated: Group 1 was milled at 1.5 mm occlusal thickness; Group 2 was milled at 0.9 mm thickness; Group 3 was 3D-printed at 1.5 mm occlusal thickness; and Group 4 was 3D-printed at 0.9 mm occlusal thickness. Eight crowns from each group were subjected to a thermocycling process for 5000 cycles between baths held at 5 °C and 55 °C with a dwell time of 30 s and transfer time of 5 s. All crowns (aged and non-aged (control)) were loaded for fracturing using a universal testing machine at a 0.5 mm/min crosshead speed. Data were analyzed using a two-way analysis of variance and multiple comparisons at (α = 0.05). Results: The maximum mean force load was found in the non-aged milled group (M1.5) at 1706.36 ± 124.07 N; the minimum mean force load was recorded for the aged 3D-printed group (3D0.9) at 552.49 ± 173.46 N. A significant difference was observed before and after thermocycling (p < 0.01). Conclusion: Computer-aided design and manufacture of milled provisional crowns is superior to 3D-printed crowns for fracture resistance. |
| format | Article |
| id | doaj-art-2b7ff95a44f444a79124cfd04cf48cb8 |
| institution | Kabale University |
| issn | 1013-9052 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Springer |
| record_format | Article |
| series | Saudi Dental Journal |
| spelling | doaj-art-2b7ff95a44f444a79124cfd04cf48cb82025-08-20T03:54:43ZengSpringerSaudi Dental Journal1013-90522023-12-0135893994510.1016/j.sdentj.2023.07.017Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative studyMajed M. Alsarani0Dental Health Department, College of Applied Medical Sciences, King Saud University, KSU, Building 24, Office: 2201, Riyadh 12372, Saudi ArabiaBackground: The advancement of digital dentistry enhanced the fabrication of indirect provisional restorations utilizing durable materials, yet the performance of provisional crowns fabricated with various techniques, and different thickness remains unknown. Thus, this in-vitro study aimed to evaluate the influence of restoration thickness and aging on the fracture behavior of provisional crowns fabricated using different techniques. Methods: A dentiform maxillary first molar was prepared using a highly filled epoxy resin material to construct identical die replicas. Four groups of provisional crowns were fabricated: Group 1 was milled at 1.5 mm occlusal thickness; Group 2 was milled at 0.9 mm thickness; Group 3 was 3D-printed at 1.5 mm occlusal thickness; and Group 4 was 3D-printed at 0.9 mm occlusal thickness. Eight crowns from each group were subjected to a thermocycling process for 5000 cycles between baths held at 5 °C and 55 °C with a dwell time of 30 s and transfer time of 5 s. All crowns (aged and non-aged (control)) were loaded for fracturing using a universal testing machine at a 0.5 mm/min crosshead speed. Data were analyzed using a two-way analysis of variance and multiple comparisons at (α = 0.05). Results: The maximum mean force load was found in the non-aged milled group (M1.5) at 1706.36 ± 124.07 N; the minimum mean force load was recorded for the aged 3D-printed group (3D0.9) at 552.49 ± 173.46 N. A significant difference was observed before and after thermocycling (p < 0.01). Conclusion: Computer-aided design and manufacture of milled provisional crowns is superior to 3D-printed crowns for fracture resistance.http://www.sciencedirect.com/science/article/pii/S101390522300144XFracture resistanceProvisional crownsAging processRestoration thicknessComputer-aided design/computer-aided manufacturing |
| spellingShingle | Majed M. Alsarani Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study Saudi Dental Journal Fracture resistance Provisional crowns Aging process Restoration thickness Computer-aided design/computer-aided manufacturing |
| title | Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study |
| title_full | Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study |
| title_fullStr | Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study |
| title_full_unstemmed | Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study |
| title_short | Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study |
| title_sort | influence of aging process and restoration thickness on the fracture resistance of provisional crowns a comparative study |
| topic | Fracture resistance Provisional crowns Aging process Restoration thickness Computer-aided design/computer-aided manufacturing |
| url | http://www.sciencedirect.com/science/article/pii/S101390522300144X |
| work_keys_str_mv | AT majedmalsarani influenceofagingprocessandrestorationthicknessonthefractureresistanceofprovisionalcrownsacomparativestudy |