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Fit and fatigue behavior of CAD-CAM lithium disilicate crowns.
Alves, William Garcia; Souza, Luiza Freitas Brum; Pereira, Gabriel Kalil Rocha; Valandro, Luiz Felipe; Kapczinski, Myriam Pereira; Mengatto, Cristiane Machado; Fraga, Sara.
Afiliação
  • Alves WG; Graduate student, Department of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.
  • Souza LFB; Postgraduate Student, Post-Graduate Program in Dental Science, Prosthodontics Unit, Department of Restorative Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil.
  • Pereira GKR; Adjunct Professor, Department of Restorative Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil.
  • Valandro LF; Professor, Department of Restorative Dentistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil.
  • Kapczinski MP; Associate Professor, Department of Conservative Dentistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.
  • Mengatto CM; Associate Professor, Department of Conservative Dentistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.
  • Fraga S; Adjunct Professor, Department of Conservative Dentistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil. Electronic address: sara.odonto@yahoo.com.br.
J Prosthet Dent ; 130(2): 241.e1-241.e8, 2023 Aug.
Article em En | MEDLINE | ID: mdl-37328406
STATEMENT OF PROBLEM: New computer-aided design and computer-aided manufacturing (CAD-CAM) lithium disilicate glass-ceramics have been marketed. However, information concerning their biomechanical behavior is lacking. PURPOSE: The purpose of this in vitro study was to compare the fit and fatigue behavior of two recently introduced CAD-CAM lithium disilicate materials with the standard IPS e.max CAD ceramic and to investigate the effect of the thermal treatment for crystallization on crown fit. MATERIAL AND METHODS: Monolithic crowns (n=15) were milled from 3 CAD-CAM lithium disilicates: IPS e.max CAD (Ivoclar AG), Rosetta SM (Hass), and T-lithium (Shenzhen Upcera Dental Technology). Marginal and internal fit were evaluated using the replica technique before and after crystallization, and the fatigue behavior of the luted crowns was evaluated by the step-stress method. One-way ANOVA and the Tukey test were used to compare fit among the materials. Fatigue failure load was evaluated by the Kaplan-Meier and Mantel-Cox tests. The effect of crystallization on fit was evaluated with the paired t test (α=.05). RESULTS: Marginal fit was different between IPS e.max CAD (74 µm) and Rosetta SM (63 µm) (P=.02). T-lithium was similar to the other ceramics (68 µm) (P>.05). Occlusal internal space was similar among all materials (P=.69). Fatigue failure loads of Rosetta SM (1160 N) and T-lithium (1063 N) were similar to IPS e.max CAD (1082 N) (P>.05). The fatigue failure load of Rosetta SM was higher than that of T-lithium (P=.04). Crystallization reduced the axial internal space of all materials (P<.05) without significantly affecting marginal fit (P>.05). CONCLUSIONS: The fit and fatigue behavior of Rosetta SM and T-lithium were similar to that of IPS e.max CAD. Crystallization reduced the internal space of the crowns.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Lítio Idioma: En Revista: J Prosthet Dent Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Lítio Idioma: En Revista: J Prosthet Dent Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos