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Fatigue failure load of two resin-bonded zirconia-reinforced lithium silicate glass-ceramics: Effect of ceramic thickness.
Dent Mater. 2018 Jun; 34(6):891-900.DM

Abstract

OBJECTIVES

To evaluate the effect of ceramic thickness on the fatigue failure load of two zirconia-reinforced lithium silicate (ZLS) glass-ceramics, adhesively cemented to a dentin analogue material.

METHODS

Disc-shaped specimens were allocated into 8 groups (n=25) considering two study factors: ZLS ceramic type (Vita Suprinity - VS; and Celtra Duo - CD), and ceramic thickness (1.0; 1.5; 2.0; and 2.5mm). A trilayer assembly (ϕ=10mm; thickness=3.5mm) was designed to mimic a bonded monolithic restoration. The ceramic discs were etched, silanized and luted (Variolink N) into a dentin analogue material. Fatigue failure load was determined using the Staircase method (100,000 cycles at 20Hz; initial fatigue load ∼60% of the mean monotonic load-to-failure; step size ∼5% of the initial fatigue load). A stainless-steel piston (ϕ=40mm) applied the load into the center of the specimens submerged in water. Fractographic analysis and Finite Element Analysis (FEA) were also performed.

RESULTS

The ceramic thickness influenced the fatigue failure load for both ZLS materials: Suprinity (716N up to 1119N); Celtra (404N up to 1126N). FEA showed that decreasing ceramic thickness led to higher stress concentration on the cementing interface.

SIGNIFICANCE

Different ZLS glass-ceramic thicknesses influenced the fatigue failure load of the bonded system (i.e. the thicker the glass ceramic is, the higher the fatigue failure load will be). Different microstructures of the ZLS glass-ceramics might affect the fatigue behavior. FEA showed that the thicker the glass ceramic is, the lower the stress concentration at the tensile surface will be.

Authors+Show Affiliations

São Paulo State University (UNESP), Science and Technology Institute, São José dos Campos, São Paulo, Brazil. Electronic address: jaiane.monteiro@ict.unesp.br.São Paulo State University (UNESP), Science and Technology Institute, São José dos Campos, São Paulo, Brazil. Electronic address: hilton.riquieri@terra.com.br.Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. Electronic address: catinaprochnow@hotmail.com.Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. Electronic address: luisfguilardi@hotmail.com.Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; School of Dentistry, Meridional Faculty - IMED, Passo Fundo, Rio Grande do Sul, Brazil. Electronic address: gabrielkrpereira@hotmail.com.Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, São Paulo, Brazil. Electronic address: aleborges@ict.unesp.br.Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, São Paulo, Brazil. Electronic address: marquesdemelo@gmail.com.Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. Electronic address: lfvalandro@hotmail.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29588077

Citation

Monteiro, Jaiane Bandoli, et al. "Fatigue Failure Load of Two Resin-bonded Zirconia-reinforced Lithium Silicate Glass-ceramics: Effect of Ceramic Thickness." Dental Materials : Official Publication of the Academy of Dental Materials, vol. 34, no. 6, 2018, pp. 891-900.
Monteiro JB, Riquieri H, Prochnow C, et al. Fatigue failure load of two resin-bonded zirconia-reinforced lithium silicate glass-ceramics: Effect of ceramic thickness. Dent Mater. 2018;34(6):891-900.
Monteiro, J. B., Riquieri, H., Prochnow, C., Guilardi, L. F., Pereira, G. K. R., Borges, A. L. S., de Melo, R. M., & Valandro, L. F. (2018). Fatigue failure load of two resin-bonded zirconia-reinforced lithium silicate glass-ceramics: Effect of ceramic thickness. Dental Materials : Official Publication of the Academy of Dental Materials, 34(6), 891-900. https://doi.org/10.1016/j.dental.2018.03.004
Monteiro JB, et al. Fatigue Failure Load of Two Resin-bonded Zirconia-reinforced Lithium Silicate Glass-ceramics: Effect of Ceramic Thickness. Dent Mater. 2018;34(6):891-900. PubMed PMID: 29588077.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fatigue failure load of two resin-bonded zirconia-reinforced lithium silicate glass-ceramics: Effect of ceramic thickness. AU - Monteiro,Jaiane Bandoli, AU - Riquieri,Hilton, AU - Prochnow,Catina, AU - Guilardi,Luís Felipe, AU - Pereira,Gabriel Kalil Rocha, AU - Borges,Alexandre Luiz Souto, AU - de Melo,Renata Marques, AU - Valandro,Luiz Felipe, Y1 - 2018/03/24/ PY - 2017/12/18/received PY - 2018/03/08/revised PY - 2018/03/12/accepted PY - 2018/3/29/pubmed PY - 2019/1/24/medline PY - 2018/3/29/entrez KW - Dental ceramics KW - Fatigue KW - Finite element analysis KW - Glass ceramics KW - Mechanical behavior KW - Monolithic full-contour restorations KW - Staircase method SP - 891 EP - 900 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 34 IS - 6 N2 - OBJECTIVES: To evaluate the effect of ceramic thickness on the fatigue failure load of two zirconia-reinforced lithium silicate (ZLS) glass-ceramics, adhesively cemented to a dentin analogue material. METHODS: Disc-shaped specimens were allocated into 8 groups (n=25) considering two study factors: ZLS ceramic type (Vita Suprinity - VS; and Celtra Duo - CD), and ceramic thickness (1.0; 1.5; 2.0; and 2.5mm). A trilayer assembly (ϕ=10mm; thickness=3.5mm) was designed to mimic a bonded monolithic restoration. The ceramic discs were etched, silanized and luted (Variolink N) into a dentin analogue material. Fatigue failure load was determined using the Staircase method (100,000 cycles at 20Hz; initial fatigue load ∼60% of the mean monotonic load-to-failure; step size ∼5% of the initial fatigue load). A stainless-steel piston (ϕ=40mm) applied the load into the center of the specimens submerged in water. Fractographic analysis and Finite Element Analysis (FEA) were also performed. RESULTS: The ceramic thickness influenced the fatigue failure load for both ZLS materials: Suprinity (716N up to 1119N); Celtra (404N up to 1126N). FEA showed that decreasing ceramic thickness led to higher stress concentration on the cementing interface. SIGNIFICANCE: Different ZLS glass-ceramic thicknesses influenced the fatigue failure load of the bonded system (i.e. the thicker the glass ceramic is, the higher the fatigue failure load will be). Different microstructures of the ZLS glass-ceramics might affect the fatigue behavior. FEA showed that the thicker the glass ceramic is, the lower the stress concentration at the tensile surface will be. SN - 1879-0097 UR - https://www.unboundmedicine.com/medline/citation/29588077/Fatigue_failure_load_of_two_resin_bonded_zirconia_reinforced_lithium_silicate_glass_ceramics:_Effect_of_ceramic_thickness_ DB - PRIME DP - Unbound Medicine ER -