Influence of different restorative materials on the stress distribution in dental implants.

Autor:	Datte CE; DDs, MSc, PhD student at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Tribst JP; DDs, MSc, PhD student at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Dal Piva AO; DDs, MSc, PhD student at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Nishioka RS; DDS, MS, PhD, Professor at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Bottino MA; DDS, MS, PhD, Professor at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Evangelhista AM; Private Pratice at Instituto de Odontologia São Paulo (IOSP), São José dos Campos, SP, Brazil. Av Pensilvânia, Jardim Florida, Jacareí , SP, Brazil., Monteiro FMM; DDs, MSc student at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil., Borges AL; DDS, MS, PhD, Professor at Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil. Avenida Engenheiro Francisco José Longo, Jardim São Dimas, São José dos Campos, SP, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2018 May 01; Vol. 10 (5), pp. e439-e444. Date of Electronic Publication: 2018 May 01 (Print Publication: 2018).
DOI:	10.4317/jced.54554
Abstrakt:	Background: To assist clinicians in deciding the most suitable restorative materials to be used in the crowns and abutment in implant rehabilitation. Material and Methods: For finite element analysis (FEA), a regular morse taper implant was created using a computer aided design software. The implant was inserted at the bone model with 3 mm of exposed threads. An anatomic prosthesis representing a first maxillary molar was modeled and cemented on the solid abutment. Considering the crown material (zirconia, chromium-cobalt, lithium disilicate and hybrid ceramic) and abutment (Titanium and zirconia), the geometries were multiplied, totaling eight groups. In order to perform the static analysis, the contacts were considered bonded and each material was assigned as isotropic. An axial load (200 N) was applied on the crown and fixation occurred on the base of the bone. Results using Von-Mises criteria and micro strain values were obtained. A sample identical to the CAD model was made for the Strain Gauge (SG) analysis; four SGs were bonded around the implant to obtain micro strain results in bone tissue. Results: FEA results were 3.83% lower than SG. According to the crown material, it is possible to note that the increase of elastic modulus reduces the stress concentration in all system without difference for bone. Conclusions: Crown materials with high elastic modulus are able to decrease the stress values in the abutments while concentrates the stress in its structure. Zirconia abutments tend to concentrate more stress throughout the prosthetic system and may be more susceptible to mechanical problems than titanium. Key words: Finite element analysis, dental implants, ceramic. Competing Interests: Conflict of interest statement: Authors denied conflicts of interest of any kind.
Databáze:	MEDLINE
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