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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Survival Probability, Weibull Characteristics, Stress Distribution, and Fractographic Analysis of Polymer-Infiltrated Ceramic Network Restorations Cemented on a Chairside Titanium Base: An In Vitro and In Silico Study

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Autor(es):
Tribst, Joao P. M. [1] ; Dal Piva, Amanda M. O. [1] ; Borges, Alexandre L. S. [1] ; Anami, Lilian C. [2] ; Kleverlaan, Cornelis J. [3, 4] ; Bottino, Marco A. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ Unesp SJC, Inst Sci & Technol, Dept Dent Mat & Prosthodont, BR-12245000 Sao Jose Dos Campos - Brazil
[2] Santo Amaro Univ UNISA, Dept Dent, BR-04743030 Sao Paulo - Brazil
[3] Univ Amsterdam, Acad Ctr Dent Amsterdam ACTA, Dept Dent Mat Sci, NL-1081 LA Amsterdam - Netherlands
[4] Vrije Univ, NL-1081 LA Amsterdam - Netherlands
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: MATERIALS; v. 13, n. 8 APR 2020.
Citações Web of Science: 6
Resumo

Different techniques are available to manufacture polymer-infiltrated ceramic restorations cemented on a chairside titanium base. To compare the influence of these techniques in the mechanical response, 75 implant-supported crowns were divided in three groups: CME (crown cemented on a mesostructure), a two-piece prosthetic solution consisting of a crown and hybrid abutment; MC (monolithic crown), a one-piece prosthetic solution consisting of a crown; and MP (monolithic crown with perforation), a one-piece prosthetic solution consisting of a crown with a screw access hole. All specimens were stepwise fatigued (50 N in each 20,000 cycles until 1200 N and 350,000 cycles). The failed crowns were inspected under scanning electron microscopy. The finite element method was applied to analyze mechanical behavior under 300 N axial load. Log-Rank (p = 0.17) and Wilcoxon (p = 0.11) tests revealed similar survival probability at 300 and 900 N. Higher stress concentration was observed in the crowns' emergence profiles. The MP and CME techniques showed similar survival and can be applied to manufacture an implant-supported crown. In all groups, the stress concentration associated with fractographic analysis suggests that the region of the emergence profile should always be evaluated due to the high prevalence of failures in this area. (AU)

Processo FAPESP: 17/23059-1 - Comportamento de diferentes reabilitações com materiais cerâmicos sob fadiga mecânica
Beneficiário:Marco Antonio Bottino
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/09104-4 - Comportamento biomecânico e sobrevivência de coroas de cerâmica híbrida implanto-suportadas confeccionadas por diferentes técnicas
Beneficiário:João Paulo Mendes Tribst
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 18/07404-3 - Influência dos tratamentos superficiais prévios à maquiagem sobre a resistência ao desgaste de uma cerâmica híbrida
Beneficiário:João Paulo Mendes Tribst
Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado