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Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour

Purpose: To analyze in vitro the mechanical behavior of five types of complete coverage crowns fabricated from different materials. Materials and methods: Seventy-five full coverage crowns were divided into five groups according to material: Group I, metal core with feldspathic ceramic covering (MC-...

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Autores principales: Agustín-Panadero, Rubén, León Martínez, Raquel, Solá-Ruíz, María Fernanda, Fons-Font, Antonio, García Engra, Georgina, Fernández-Estevan, Lucía
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6888599/
https://www.ncbi.nlm.nih.gov/pubmed/31703291
http://dx.doi.org/10.3390/ma12223663
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author Agustín-Panadero, Rubén
León Martínez, Raquel
Solá-Ruíz, María Fernanda
Fons-Font, Antonio
García Engra, Georgina
Fernández-Estevan, Lucía
author_facet Agustín-Panadero, Rubén
León Martínez, Raquel
Solá-Ruíz, María Fernanda
Fons-Font, Antonio
García Engra, Georgina
Fernández-Estevan, Lucía
author_sort Agustín-Panadero, Rubén
collection PubMed
description Purpose: To analyze in vitro the mechanical behavior of five types of complete coverage crowns fabricated from different materials. Materials and methods: Seventy-five full coverage crowns were divided into five groups according to material: Group I, metal core with feldspathic ceramic covering (MC- control group); Group II, zirconia core with feldspathic ceramic covering (CZ); Group III, tetragonal monolithic zirconia (TMZ); Group IV, cubic monolithic zirconia (CMZ); Group V, high molecular weight polymethyl methacrylate (PMMAG) doped with graphene nanoparticles. All crowns underwent in vitro fatiguing by dynamic loading in wet conditions to simulate the masticatory forces to which prosthodontic materials are subject in the oral medium. Lastly, fracture resistance was evaluated by static compression testing. Results: The fracture resistance values obtained were as follows: Group MC, 2443.6 ± 238.6 N; Group CZ, 2095.4 ± 329.2 N; Group TMZ, 2494.6 ± 236.6 N; Group CMZ, 1523.6 ± 325.2 N; and Group PMMAG, 1708.9 ± 386.6 N. Group MC presented higher strength with statistically significant differences in comparison with Groups CZ (P = 0.002), CMZ (P < 0.001), and PMMAG (P < 0.001). Weibull distribution showed less probability of cumulative biomechanical failure in Groups MC and TMZ. Conclusions: Metal-ceramic and tetragonal zirconia showed high fracture resistance, while cubic zirconia and PMMA doped with graphene nanoparticles obtained lower values.
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spelling pubmed-68885992019-12-09 Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour Agustín-Panadero, Rubén León Martínez, Raquel Solá-Ruíz, María Fernanda Fons-Font, Antonio García Engra, Georgina Fernández-Estevan, Lucía Materials (Basel) Article Purpose: To analyze in vitro the mechanical behavior of five types of complete coverage crowns fabricated from different materials. Materials and methods: Seventy-five full coverage crowns were divided into five groups according to material: Group I, metal core with feldspathic ceramic covering (MC- control group); Group II, zirconia core with feldspathic ceramic covering (CZ); Group III, tetragonal monolithic zirconia (TMZ); Group IV, cubic monolithic zirconia (CMZ); Group V, high molecular weight polymethyl methacrylate (PMMAG) doped with graphene nanoparticles. All crowns underwent in vitro fatiguing by dynamic loading in wet conditions to simulate the masticatory forces to which prosthodontic materials are subject in the oral medium. Lastly, fracture resistance was evaluated by static compression testing. Results: The fracture resistance values obtained were as follows: Group MC, 2443.6 ± 238.6 N; Group CZ, 2095.4 ± 329.2 N; Group TMZ, 2494.6 ± 236.6 N; Group CMZ, 1523.6 ± 325.2 N; and Group PMMAG, 1708.9 ± 386.6 N. Group MC presented higher strength with statistically significant differences in comparison with Groups CZ (P = 0.002), CMZ (P < 0.001), and PMMAG (P < 0.001). Weibull distribution showed less probability of cumulative biomechanical failure in Groups MC and TMZ. Conclusions: Metal-ceramic and tetragonal zirconia showed high fracture resistance, while cubic zirconia and PMMA doped with graphene nanoparticles obtained lower values. MDPI 2019-11-07 /pmc/articles/PMC6888599/ /pubmed/31703291 http://dx.doi.org/10.3390/ma12223663 Text en © 2019 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Agustín-Panadero, Rubén
León Martínez, Raquel
Solá-Ruíz, María Fernanda
Fons-Font, Antonio
García Engra, Georgina
Fernández-Estevan, Lucía
Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title_full Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title_fullStr Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title_full_unstemmed Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title_short Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
title_sort are metal-free monolithic crowns the present of prosthesis? study of mechanical behaviour
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6888599/
https://www.ncbi.nlm.nih.gov/pubmed/31703291
http://dx.doi.org/10.3390/ma12223663
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