Estudos

Dezembro 12, 2017

The substitution of the implant and abutment for their analogs in mechanical studies: In vitro and in silico analysis

Materials Science and Engineering: CVolume 75, 1 June 2017, Pages 50-54Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Av. Limeira 901, Piracicaba 13414-903, São Paulo, Brazil.Received 3 October 2016, Revised 1 December 2016, Accepted 7 February 2017, Available online 9 February 2017.

Highlights

A less costly methodology for evaluate implant-supported crowns is proposed.
It is suggested the substitution of the implant or abutment for their analogs.
The outcomes of fracture load are not influenced by these replacements.

Abstract

The use of analogs could reduce the cost of mechanical tests involving implant-supported crowns, but it is unclear if it would negatively affect the data accuracy. This study evaluated the substitution of the implant by implants analogs or abutment analogs as a support for crowns in mechanical tests, taking into account stress distribution and fracture load of monolithic lithium disilicate crowns. Thirty lithium disilicate monolithic crowns were randomized into three groups according to the set: Implant + abutment (IA); implant analog + abutment (IAA); abutment analog (AA). The specimens were subjected to mechanical fatigue (106 cycles, 200 N, 2 Hz) and thermal fatigue (104 cycles, 5°–55 °C). A final compression load was applied and the maximum fracture load was recorded. Data were analyzed using one-way ANOVA (? = 0.05). The experiment was validated by finite element analysis and the maximum principal stress was recorded. No statistically significant difference was observed in the mean fracture load among groups (P > 0.05). The failure mode was similar for all groups with the origin of crack propagation located at the load point application. Finite element analysis showed similar stress distribution and stress peak values for all groups. The use of implant’s or abutment’s analog does not influence the fracture load and stress distribution for cemented implant-supported crowns.

Graphical abstract

Vitae

Rafael Soares Gomes Graduated in Dentistry at Federal University of Bahia (2013). Master in Clinical Dentistry – Dental Prosthesis at State University of Campinas (2014–2016). PhD in progress at the State University of Campinas (2016–Current).

Edmara Tatiely Pedroso Bergamo Graduated in Dentistry at State University of Maringa, UEM (2009). Specialization in Prosthodontics at State University of Maringa (2010 ? 2012). Master in Clinical Dentistry – Dental Prosthesis at State University of Campinas (2013–2015). PhD in progress at the State University of Campinas (2015–Current).

Dimorvan Bordin Graduated in Dentistry at University of Passo Fundo (2011). Master in Clinical Dentistry – Dental Prosthesis at State University of Campinas (2012–2014). PhD in progress at the State University of Campinas (2014–Current).

Altair Antoninha Del Bel Cury Graduated in Dentistry at State University of Campinas (1971). Master in Dental Materials at State University of Campinas (1985–1988). PhD in Dentistry – Oral Rehabilitation at University of São Paulo (1989–1992). Full Professor of Prosthodontics at Piracicaba Dental School – State University of Campinas). Associate Editor in the journal Brazilian Oral Research. President of the Brazilian Division of IADR – International Association for Dental Research (2014–2016).