Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns

Autor(es)

Feitosa, Sabrina A. ^{[1, 2]} ; Campos, Fernanda ^[1] ; Yoshito, Walter Kenji ^[3] ; Lazar, Dolores R. R. ^[3] ; Ussui, Valter ^[3] ; Valandro, Luiz Felipe ^{[1, 4]} ; Bottino, Marco A. ^[1] ; Bottino, Marco C. ^[5]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, SP - Brazil

^[2] IUSD, Div Dent Biomat, Dept Biomed & Appl Sci, Indianapolis, IN - USA

^[3] Inst Energy & Nucl Res IPEN, Mat Sci & Technol Ctr, Sao Paulo, SP - Brazil

^[4] Univ Fed Santa Maria, Sch Dent, Prosthodont Unit, PhD Grad Program Oral Sci, Santa Maria, RS - Brazil

^[5] Univ Michigan, Sch Dent, Dept Cariol Restorat Sci & Endodont, 1011N Univ Ave Rm 5223, Ann Arbor, MI 48109 - USA

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES; v. 85, p. 106-112, OCT 2018.
• Citações Web of Science: 1

Resumo

This study evaluated the effect of distinct bonding strategies on the retention of fullcontour 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 dentinanalogue material to simulate a prepared tooth. FCZ crowns were manufactured using CADCAM 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. (AU)

• Processo FAPESP: 12/02945-0 - Caracterização e avaliação da adesão a uma cerâmica policristalina de zircônia tetragonal parcialmente estabilizada com ítria
• Beneficiário: Sabrina Feitosa Sochacki
• Modalidade de apoio: Bolsas no Brasil - Doutorado