Mechanical characterization of dental prostheses manufactured with PMMA–graphene composites
Author
Punset fuste, Miquel
Pérez-Pevida, Esteban
Manero, José María
Publication date
2022ISSN
1996-1944
Abstract
The use of a PMMA composite with graphene is being commercialized for application as dental prostheses. The different proportions of fibers provide a wide range of colors that favors dental esthetics in prostheses. However, there are no studies that have explained the influence that graphene has on the mechanical properties. In this contribution, we studied the PMMA and PMMA material with graphene fibers (PMMA-G) in the form of discs as supplied for machining. The presence of graphene fibers has been studied by Raman spectroscopy and the Shore hardness and Vickers micro hardness were determined. Mechanical compression tests were carried out to obtain the values of maximum strength and Young’s modulus (E) and by means of pin-on-disc wear tests, the specific wear rate and the friction coefficients were determined following the established international standards. Finally, the samples were characterized by field emission scanning electron microscopy (FESEM) to characterize the graphene’s morphology inside the PMMA. The results showed the presence of graphene in PMMA and was estimated in an amount of 0.1027% by weight in G-PMMA. The Shore hardness and Vickers microhardness values did not show statistically significant differences. Differences were observed in the compression maximum strength (129.43 MPa for PMMA and 140.23 for PMMA-G) and E values (2.01 for PMMA and 2.89 GPa for PMMA-G) as well as in the lower wear rate for the G-PMMA samples (1.93 × 10−7 for PMMA and 1.33 × 10−7 mm3/N·m) with a p < 0.005. The coefficients of friction for PMMA-G decreased from 0.4032 for PMMA to 0.4001 for PMMA-G. From the results obtained, a slight content in graphene produced a significant improvement in the mechanical properties that could be observed in the prosthesis material. Therefore, we can state that the main attraction of this material for dental prosthesis is its esthetics.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
616.3 - Pathology of the digestive system. Complaints of the alimentary canal
Keywords
Materials dentals
Materials protèsics
PMMA
Grafè
Compostos
Propietats mecàniques
Materiales dentales
Materiales protésicos
PMMA
Grafeno
Composicion
Propiedades mecánicas
Dental materials
Prosthetic materials
PMMA
Graphene
Composites
Mechanical properties
Pages
18
Publisher
Materials
Collection
15;15
Is part of
Materials
Citation
Punset Fuste, Miquel; Brizuela Velasco, Aritza; Pérez-Pevida, Esteban [et al.]. Mechanical characterization of dental prostheses manufactured with PMMA–graphene composites. Materials, 2022, 15(15), 5391. Disponible en: <https://www.mdpi.com/1996-1944/15/15/5391>. Fecha de acceso: 29 nov. 2022. DOI: 10.3390/ma15155391
Link to the related item
This item appears in the following Collection(s)
- Odontologia [228]
Rights
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/