Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns
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2018
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International Journal of Adhesion and Adhesives
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This study evaluated the effect of distinct bonding strategies on the retention of full-contour zirconia ceramic (YTZP,
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/cm3, Vickers hardness of
12.4±0.07 GPa, and fracture toughness of 5.54±0.24 MPam1/2. 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.
Como referenciar
FEITOSA, SABRINA A.; CAMPOS, FERNANDA; YOSHITO, WALTER K.; LAZAR, DOLORES R.R.; USSUI, VALTER; VALANDRO, LUIZ F.; BOTTINO, MARCO A.; BOTTINO, MARCO C. Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns. International Journal of Adhesion and Adhesives, v. 85, p. 106-112, 2018. DOI: 10.1016/j.ijadhadh.2018.06.006. Disponível em: http://repositorio.ipen.br/handle/123456789/29303. Acesso em: 07 Feb 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.