Mechanical characterization of dental prostheses manufactured with PMMA–graphene composites
Autor/a
Pérez-Pevida, Esteban
Data de publicació
2022ISSN
1996-1944
Resum
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.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
Anglès
Matèries (CDU)
616.3 - Patologia de l'aparell digestiu. Odontologia
Paraules clau
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
Pàgines
18
Publicat per
Materials
Col·lecció
15;15
Publicat a
Materials
Citació
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
Enllaç al document relacionat
Aquest element apareix en la col·lecció o col·leccions següent(s)
- Odontologia [228]
Drets
© 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/).
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