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Effect of SiO2 and Al2 O3 nanoparticles on wear resistance of PMMA acrylic denture teeth / Efeito das nanopartículas de SiO2 e Al2 O3 na resistência ao desgaste de dentes em acrílico PMMA para prótese
Helal, Mohamed A; Yang, Bin; Saad, Esam; Abas, Mohamed; Al-Kholy, Mohamed Reda; Imam, Ahmad Y; Gad, Mohammed M.
  • Helal, Mohamed A; Al-Azhar University. Faculty of Dentistry. Department of Removable Prosthodontics. Cairo. EG
  • Yang, Bin; Illinois University. Department of Restorative Dentistry. Chicago. US
  • Saad, Esam; Al-Azhar University. Faculty of Dentistry. Department of Removable Prosthodontics. Cairo. EG
  • Abas, Mohamed; Al-Azhar University. Faculty of Dentistry. Department of Dental Biomaterials. Cairo. EG
  • Al-Kholy, Mohamed Reda; Al-Azhar University. Faculty of Dentistry. Department of Removable Prosthodontics. Cairo. EG
  • Imam, Ahmad Y; King Abdulaziz University. Faculty of Dentistry. Oral and Maxillofacial Prosthodontics Department. Jeddah. SA
  • Gad, Mohammed M; Imam Abdulrahman Bin Faisal University. College of Dentistry. Department of Substitutive Dental Sciences. Dammam. SA
Braz. dent. sci ; 23(3): 1-12, 2020. ilus, tab
Article in English | BBO, LILACS | ID: biblio-1116334
RESUMO

Objetivo:

Este estudo teve como objetivo avaliar a resistência ao desgaste de dentes em acrílico para próteses contendo nanopartículas de dióxido de silício (nano-SiO2 ) e dióxido de alumínio (nanoAl2 O3 ). Material e

Métodos:

O material em polimetilmetacrilato (PMMA) foi utilizado para fabricar 84 amostras (n=10) contendo nano-SiO2 e nano-Al2 O3 nas concentrações 0,1% em peso, 0,3% em peso e 0,5% em peso de acrílico. Uma máquina de teste de desgaste de dois corpos e um microscópio digital foram usados para medir as mudanças na perda de peso e rugosidade da superfície, respectivamente. Testes de ANOVA a um fator e testes de comparações múltiplas de Tukey foram utilizados para análise dos dados (α = 0,05).

Resultados:

O material modificado com nano-SiO2 demonstrou um aumento significativo na perda de peso em comparação com o material acrílico artificial convencional (p ˂ 0,05) enquanto o material modificado com nano-Al2 O3 demonstrou aumento não significativo na perda de peso, exceto no subgrupo 0,5% (p < 0,05). Não há diferenças significativas em relação à alteração da rugosidade após a simulação de desgaste entre todos os grupos testados (p > 0,05).

Conclusão:

As nanopartículas de nano-Al2 O3 exibem menos efeito negativo que o nanoSiO2 , podendo ser usado com cautela, se necessário. (AU)
ABSTRACT

Objective:

This study aimed to evaluate the wear resistance of acrylic denture teeth containing silicon dioxide (nano-SiO2 ) and aluminum dioxide (nano-Al2 O3 ) nanoparticles. Material and

Methods:

Poly methyl methacrylate (PMMA) denture tooth material was used to denture tooth material was used to fabricate 84 specimens (n=10) containing nano-SiO2 and nano-Al2 O3 in concentrations 0.1wt%, 0.3wt%, and 0.5wt% of acrylic powder. A two-body wear testing machine and digital microscope were used to measure the changes in weight loss and surface roughness respectively. One-way ANOVA and pair-wise Tukey's post-hoc tests were used for data analysis (α = 0.05).

Results:

Nano-SiO2 modified teeth material demonstrated a significant increase in weight loss in comparison conventional artificial acrylic teeth material (p ˂ 0.05) while nanoAl2 O3 modified teeth material demonstrated non-significant increase in weight loss except for 0.5% subgroup (p ˂ 0.05). There is no significant differences regarding roughness change after wear simulation among all tested groups (p > 0.05).

Conclusion:

Nano-Al2 O3 nanoparticles exhibit less negative effect than nano-SiO2 so; it could be used with caution if necessary. (AU)
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Dental Prosthesis / Polymethyl Methacrylate / Metal Nanoparticles / Tooth Wear Language: English Journal: Braz. dent. sci Journal subject: Dentistry / Sa£de Bucal Year: 2020 Type: Article Affiliation country: Egypt / Saudi Arabia / United States Institution/Affiliation country: Al-Azhar University/EG / Illinois University/US / Imam Abdulrahman Bin Faisal University/SA / King Abdulaziz University/SA

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Full text: Available Index: LILACS (Americas) Main subject: Dental Prosthesis / Polymethyl Methacrylate / Metal Nanoparticles / Tooth Wear Language: English Journal: Braz. dent. sci Journal subject: Dentistry / Sa£de Bucal Year: 2020 Type: Article Affiliation country: Egypt / Saudi Arabia / United States Institution/Affiliation country: Al-Azhar University/EG / Illinois University/US / Imam Abdulrahman Bin Faisal University/SA / King Abdulaziz University/SA