Toothbrushing Wear Resistance of Stained CAD/CAM Ceramics

Author(s)

Dal Piva, Amanda Maria de Oliveira ^[1] ; Bottino, Marco Antonio ^[1] ; Anami, Lilian Costa ^[1] ; Werner, Arie ^{[2, 3]} ; Kleverlaan, Cornelis Johannes ^{[2, 3]} ; Lo Giudice, Roberto ^[4] ; Fama, Fausto ^[4] ; Silva-Concilio, Lais Regiane da ^[5] ; Tribst, Joao Paulo Mendes ^[5]

Affiliation

^[1] Sao Paulo State Univ Unesp SJC, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Postgrad Program Restorat Dent Prosthodonti, Engenheiro Francisco Jose Longo Ave 777, BR-12245000 Sao Jose Dos Campos - Brazil

^[2] Univ Amsterdam, Acad Ctr Dent Amsterdam ACTA, Dept Dent Mat Sci, Gustav Mahlerlaan 3004, NL-1081 Amsterdam - Netherlands

^[3] Vrije Univ, Gustav Mahlerlaan 3004, NL-1081 Amsterdam - Netherlands

^[4] Univ Hosp G Martino Messina, Dept Human Pathol Adulthood & Childhood G Barresi, Via Consolare Valeria 1, I-98125 Messina - Italy

^[5] Univ Taubate UNITAU, Dept Dent, Postgrad Program Dent, Operarios St 09, BR-12020340 Sao Paulo - Brazil

• Document type: Journal article
• Source: COATINGS; v. 11, n. 2 FEB 2021.
• Web of Science Citations: 2

Abstract

Aim: To investigate the effect of toothbrushing on different stained Computerd Aided Design/Computer Aided Manufacturing CAD/CAM ceramics. Materials and Methods: Fifty specimens (high translucency zirconia, YZHT; zirconia-reinforced lithium silicate, ZLS; feldspathic, FDL; hybrid ceramic, HC; all from Vita Zahnfabrik) were divided into five groups according to their staining technique. ZLS allowed the composition of two groups: ZLS1 with crystallization and staining together; ZLS2, with the stain firing after the crystallization. YZHT received a stain firing after the sintering process, and FDL received stain firing directly. The HC was stained with acrylic staining, and was light-cured on its surface. The specimens were brushed in total for 150,000 cycles at 2.45 N with 180 strokes/min. Surface measurements to obtain Rz were performed after 50,000, 100,000 and 150,000 cycles, with five evaluation lines (5 mm) per specimen orthogonal to the brushing direction, covering brushed and unbrushed areas. The wear was analyzed using two-way ANOVA and Tukey tests (alpha = 5%). Scanning electron microscopy (SEM) was performed to access the surface profile. The wear was affected by material (p < 0.001) and time (p = 0.139). Superior wear (mu m) was observed for HC (6.6 +/- 4.4; 6.8 +/- 4.0; 9.2 +/- 3.5) compared to ZLS2 (1.0 +/- 0.3; 1.2 +/- 2.2; 1.3 +/- 0.3), YZHT (1.0 +/- 0.1; 1.2 +/- 0.3; 1.2 +/- 0.3), ZLS1 (0.9 +/- 0.1; 1.1 +/- 0.5; 1.2 +/- 0.3) and FDL (0.9 +/- 0.1; 0.9 +/- 0.1; 1.0 +/- 0.2) after 5, 10 and 15 years of simulation, respectively. SEM showed different wear patters for HC with the removal of the glaze layer. HC showed a higher staining wear rate compared to the glass-based and polycrystalline ceramics after 15 years. The extrinsic characterization of feldspathic ceramic showed its superior longevity compared to the evaluated high-translucency zirconia, zirconia-reinforced lithium silicate, and hybrid ceramic. (AU)

• FAPESP's process: 18/05908-4 - Durability evaluation of the shade characterization layer on monolithic ceramics
• Grantee: Lilian Costa Anami Paulin
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/11535-3 - Influence of ceramic thickness on biomechanical behavior, survival and translucency of monolithic crowns
• Grantee: Amanda Maria de Oliveira Dal Piva
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/03984-5 - The effect of wear on the shade characterization of different monolithic ceramics
• Grantee: Amanda Maria de Oliveira Dal Piva
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 18/07404-3 - Influence of surface treatments before staining on the wear resistance of a hybrid ceramic
• Grantee: João Paulo Mendes Tribst
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate