Comparison of the bond strengths of resin cement to new esthetic CAD/CAM materials and their durability
Ahmed Mohsen Mohamed Foad;
Abstract
Success or failure of the ceramic restorations especially CAD/CAM restorations depend on many factors. The bond strength and durability of these restorations are of the highest clinical significance.
Although newly introduced CAD/CAM Hybrid ceramics feature a diversity of superior esthetic & mechanical properties, yet, little is known regarding the bond strength of these materials. Moreover, recently introduced bonding systems assume a high bonding performance without the harmful effects of the HF acid.
This study was done to evaluate the effect of different types of ceramic materials, different surface treatments and different aging condition on the final tensile bond strength with resin cements.
One hundred forty four specimens were prepared with dimensions 1X1 cm and 3.4 mm thickness using an Isomet precision sawing machine. Specimens were divided into 3 groups according to types of ceramic materials (lithium Disilicate: emax CAD, polymer infiltrated ceramic network: Vita Enamic and Zirconia reinforced Lithiumsilicate: Vita Suprinity). Each group was subjected to 3 surface treatments(HF acid, MBE&P and MBE&P+MBP), then was subsequently cemented to composite resin tubes using Multilink Automix resin cement and finallysubjected to different aging conditions( 3days and 150days+ 37500 thermal cycles).
Tensile bond strength was measured using universal testing machine (2mm/min) and the mode of failure was inspected using a stereomicroscope, and then confirmed using scanning electron microscope.
Results were tabulated and assessed using three way Anova to assess the effect of material, surface treatment and aging followed by tukey’s post hock test and simple main effect with bonferrioni correction, revealing that there was a significant effect of surface treatments, aging process and materials-surface treatments interaction on the tensile bond strength to resin cements.
Emax CAD showed the highest bond strength values to resin cement. Moreover, the use of HF acid+Silane proved to be the best bonding system. Finally, aging adversely affected the bond strength where Vita Enamic was the least affected material by long term aging.
Although newly introduced CAD/CAM Hybrid ceramics feature a diversity of superior esthetic & mechanical properties, yet, little is known regarding the bond strength of these materials. Moreover, recently introduced bonding systems assume a high bonding performance without the harmful effects of the HF acid.
This study was done to evaluate the effect of different types of ceramic materials, different surface treatments and different aging condition on the final tensile bond strength with resin cements.
One hundred forty four specimens were prepared with dimensions 1X1 cm and 3.4 mm thickness using an Isomet precision sawing machine. Specimens were divided into 3 groups according to types of ceramic materials (lithium Disilicate: emax CAD, polymer infiltrated ceramic network: Vita Enamic and Zirconia reinforced Lithiumsilicate: Vita Suprinity). Each group was subjected to 3 surface treatments(HF acid, MBE&P and MBE&P+MBP), then was subsequently cemented to composite resin tubes using Multilink Automix resin cement and finallysubjected to different aging conditions( 3days and 150days+ 37500 thermal cycles).
Tensile bond strength was measured using universal testing machine (2mm/min) and the mode of failure was inspected using a stereomicroscope, and then confirmed using scanning electron microscope.
Results were tabulated and assessed using three way Anova to assess the effect of material, surface treatment and aging followed by tukey’s post hock test and simple main effect with bonferrioni correction, revealing that there was a significant effect of surface treatments, aging process and materials-surface treatments interaction on the tensile bond strength to resin cements.
Emax CAD showed the highest bond strength values to resin cement. Moreover, the use of HF acid+Silane proved to be the best bonding system. Finally, aging adversely affected the bond strength where Vita Enamic was the least affected material by long term aging.
Other data
| Title | Comparison of the bond strengths of resin cement to new esthetic CAD/CAM materials and their durability | Other Titles | مقارنة القوة اللاصقة بين اللواصق الراتنجية و مختلف خامات الكاد /كام الجمالية الحديثة و استمراريتها | Authors | Ahmed Mohsen Mohamed Foad | Issue Date | 2015 |
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