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Effect of Die Spacer Thickness on the Fracture Resistance of CAD/CAM Lithium Disilicate Veneers on Maxillary First Premolars
| Content Provider | Scilit |
|---|---|
| Author | Farag, Sherine Mohamed Ghoneim, Mona Mohamed Afifi, Rania Reda |
| Copyright Year | 2021 |
| Description | Objective: The purpose of this study was to compare the fracture resistance of ceramic veneers with digital die spacer settings at 20 μm, 40 μm, and 100 μm. Materials and Methods: Eighteen sound maxillary first premolars were divided into three groups (n=6) according to their digital die spacer settings: group A=20 μm, group B=40 μm, group C=100 μm. Each tooth was prepared to a depth of 0.5 mm to receive lithium disilicate veneers (IPS e.max CAD, Ivoclar Vivadent). All groups were thermocycled (2500 cycles at 5– 55°C) and subjected to fracture resistance test using a universal testing machine until failure. Failure modes were examined using a stereomicroscope. Results: The values (N) for group A=1181.34± 301.33, group B=1014.29± 291.12, and group C=841.89± 244.59. One-way ANOVA showed no statistical difference among the three groups (p=0.145). However, chi-square test showed that a significant difference was present in the modes of failure (p=0.009). Tukey's post hoc test indicated that the failure modes of group A were statistically different from those of group C, showing 83.3% adhesive failure for group A compared to 0% adhesive failures in group C. A p-value of ≤ 0.05 was considered as statistically significant. Conclusion: Digital die spacer thickness did not influence the mean fracture resistance values of CAD/CAM lithium disilicate veneers. However, the way the failure occurred differed significantly at various die spacer thicknesses. |
| Related Links | https://www.dovepress.com/getfile.php?fileID=70310 |
| Ending Page | 230 |
| Page Count | 8 |
| Starting Page | 223 |
| ISSN | 11791357 |
| DOI | 10.2147/ccide.s313131 |
| Journal | Clinical, cosmetic and investigational dentistry |
| Volume Number | 13 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2021-06-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Clinical, Cosmetic and Investigational Dentistry Dentistry and Oral Surgery Fracture Resistance Die Spacer Lithium Disilicate Cad Veneers Cad/cam Cement Thickness Cement Space |
| Content Type | Text |
| Resource Type | Article |
| Subject | Dentistry |
