التفاصيل البيبلوغرافية
العنوان: |
Flexural strength of minimum thickness ceramic veneers manufactured with different techniques. |
المؤلفون: |
Rizzante, Fabio A. P., Soares-Rusu, Idiane B. L., Senna, Suellen S., Ramos-Tonello, Carla M., Mondelli, Rafael F. L., Ishikiriama, Sérgio K., Borges, Ana Flávia S., Gutmacher, Zvi |
المصدر: |
Quintessence International; Apr2020, Vol. 51 Issue 4, p268-273, 6p, 1 Black and White Photograph, 3 Diagrams, 1 Chart |
مصطلحات موضوعية: |
ANALYSIS of heavy metals, SILICATES analysis, COMPUTER-aided design, DENTAL resins, DENTAL veneers, DENTURES, LITHIUM, SCANNING electron microscopy, STATISTICS, PROSTHESIS design & construction, DATA analysis, TENSILE strength, ONE-way analysis of variance |
مستخلص: |
The objective of the present study was to assess the effect of monolithic and bilayer restorations considering heat-pressed and milled/CAD/CAM reinforced lithium disilicate ceramic veneers, on the flexural strength after cementation. Method and materials: Thirty-five specimens were divided into five groups (n = 7), according to the restorative solution: 2-mm thickness composite resin (CR2); heat-pressed monolithic ceramic 0.6 mm (HPM), CAD/CAM monolithic ceramics 0.6 mm (CCM); heat-pressed monolithic ceramic 0.4 mm + 0.2 mm glass-ceramic (HPB); CAD/CAM monolithic ceramic 0.4 mm + 0.2 glass-ceramic (CCB). Specimens were cemented on composite resin bars and submitted to a threepoint bending test on a Universal Testing Machine, until fracture. Fractured samples were analyzed under stereomicroscope and SEM. Flexural strength data were analyzed by one-way ANOVA and Tukey test. Results: The control group showed the highest flexural strength results (119.57 ± 19.49 MPa), with values similar to groups HPM (98 ± 25.62 MPa) and CCM (96.14 ± 20.60 MPa). Groups HPB and CCB showed lower values when compared with the other groups. Fracture started from the base on monolithic groups and from ceramic on bilayer groups. Conclusion: Both ceramic systems (CAD/ CAM and heat-pressed) have similar fracture strength, although bilayer restorations present lower strength when compared with monolithic ceramics. [ABSTRACT FROM AUTHOR] |
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قاعدة البيانات: |
Complementary Index |