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Effect of oral exposure on chemical, physical, mechanical, and morphologic properties of clear orthodontic aligners.
Lira, Larine Ferreira; Otero Amaral Vargas, Eduardo; Moreira da Silva, Eduardo; Nunes da Silva Meirelles Dória Maia, Juliana; Elzubair, Amal; Siqueira de Morais, Liliane; Alvaro de Souza Camargo, Sérgio; Serra, Glaucio; Gomes de Souza, Margareth Maria.
Afiliação
  • Lira LF; Department of Pediatric Dentistry and Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
  • Otero Amaral Vargas E; Department of Pediatric Dentistry and Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
  • Moreira da Silva E; Analytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Federal Fluminense University, Niterói, Brazil.
  • Nunes da Silva Meirelles Dória Maia J; Analytical Laboratory of Restorative Biomaterials-LABiom-R, School of Dentistry, Federal Fluminense University, Niterói, Brazil.
  • Elzubair A; Metallurgical and Materials Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering (COPPE), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
  • Siqueira de Morais L; Department of Pediatric Dentistry and Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
  • Alvaro de Souza Camargo S; Metallurgical and Materials Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering (COPPE), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Nanotechnology Engineering Program, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Bra
  • Serra G; Department of Specific Formation, Federal Fluminense University, Nova Friburgo, Brazil.
  • Gomes de Souza MM; Department of Pediatric Dentistry and Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: margasouzaster@gmail.com.
Am J Orthod Dentofacial Orthop ; 164(2): e51-e63, 2023 Aug.
Article em En | MEDLINE | ID: mdl-37330727
INTRODUCTION: The dental industry is heavily committed to developing more esthetic solutions for orthodontic treatments. Invisalign is a system of transparent orthodontic aligners introduced as an alternative to conventional orthodontic fittings with brackets and metal wires. This study aimed to assess the chemical, physical, mechanical and morphologic changes in these polymeric aligners after exposure to the oral environment. METHODS: Twenty-four Invisalign orthodontic aligners were equally divided into 2 groups: an in vivo aged group in which patients used aligners for 14 days and the reference group, unexposed to the oral environment. Different experimental techniques were used to study the chemical structure, the color changes and translucency, the density and subsequent volume of the aligners, mechanical properties, surface roughness, morphology and elemental composition. The data were subjected to several statistical analyses. RESULTS: Clear orthodontic aligners exhibit chemical stability but undergo a statistically significant optical change in color and translucency. There was a gradual increase in the water absorption rate and the dimensional variation of the polymer, indicating a strong correlation among these factors. The mechanical properties of the polymer showed a statistically significant decrease in its elastic modulus and hardness. There was a slight tendency toward increased surface roughness of the material, but no statistical differences were found between reference and aged groups. The surface morphology of the used aligners demonstrates microcracks, distortions and biofilm formation. CONCLUSION: Intraoral aging adversely affected the physical, mechanical, and morphologic properties of the Invisalign appliance.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Aparelhos Ortodônticos / Polímeros Limite: Humans Idioma: En Revista: Am J Orthod Dentofacial Orthop Assunto da revista: ODONTOLOGIA / ORTODONTIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
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Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Aparelhos Ortodônticos / Polímeros Limite: Humans Idioma: En Revista: Am J Orthod Dentofacial Orthop Assunto da revista: ODONTOLOGIA / ORTODONTIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos