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Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns.
- Source :
-
International Journal of Adhesion & Adhesives . Oct2018, Vol. 85, p106-112. 7p. - Publication Year :
- 2018
-
Abstract
- This study evaluated the effect of distinct bonding strategies on the retention of full-contour zirconia ceramic (Y-TZP, FCZ) crowns, and it characterized some physicochemical and mechanical properties of FCZ ceramic and its corresponding glazing system. To evaluate retention strength, dies were made with a dentin-analogue material to simulate a prepared tooth. FCZ crowns were manufactured using CAD-CAM technology and allocated into groups according to the bonding strategy: no ceramic treatment (PF – Panavia F cementation), glaze (GL), tribochemical silica coating (CJ), CJ + GL, and piranha solution followed by glaze (PS + GL). The specimens were subjected to thermocycling and storage in distilled water for 100 days before the retention tests. FCZ presented a porosity volume fraction of 0.2%, an apparent density of 6.06 g/cm 3 , Vickers hardness of 12.4 ± 0.07 GPa, and fracture toughness of 5.54 ± 0.24 MPa m 1/2 . SEM revealed a homogeneous microstructure composed of submicron-sized grains. XRD identified mainly zirconia's tetragonal phase. Glaze powder morphology was observed to be irregular, with a nanometric particle size, and a diffraction pattern characteristic of an amorphous material with several peaks of leucite. The PF and GL groups had higher retention values. The majority of the groups presented pre-test bonding failures, and two catastrophic failures of the FCZ-crown (GL and PF groups) were noted. The use of an MDP-containing resin cement or glaze application might improve retention of the FCZ crowns. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01437496
- Volume :
- 85
- Database :
- Academic Search Index
- Journal :
- International Journal of Adhesion & Adhesives
- Publication Type :
- Academic Journal
- Accession number :
- 131186120
- Full Text :
- https://doi.org/10.1016/j.ijadhadh.2018.06.006