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Effect of Orthodontic Bracket Type and Mouthguard Presence on the Stress and Strain during a Frontal Impact.
Alves, Júlio César de Carvalho; Borges, Gilberto Antônio; Versluis, Antheunis; Soares, Carlos José; Veríssimo, Crisnicaw.
Afiliação
  • Alves JCC; Department of Restorative Dentistry, School of Dentistry, UNIUBE - Universidade de Uberaba, Uberaba, MG, Brazil.
  • Borges GA; Department of Restorative Dentistry, School of Dentistry, UNIUBE - Universidade de Uberaba, Uberaba, MG, Brazil.
  • Versluis A; Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA.
  • Soares CJ; Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Universidade Federal de Uberlândia, MG, Brazil.
  • Veríssimo C; Department of Oral Rehabilitation, School of Dentistry, UFG - Universidade Federal de Goiás, Goiânia, GO, Brazil.
Braz Dent J ; 31(5): 540-547, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33146339
ABSTRACT
The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceramic) and mouthguard on biomechanical response during impact. Two-dimensional plane-strain models of a patient with increased positive overjet of the maxillary central incisor was created based on a CT scan, simulating the periodontal ligament, bone support, gingival tissue, orthodontic brackets (metallic or ceramic) and mouthguard. A nonlinear dynamic impact finite element analysis was performed in which a steel object hit the model at 1 m/s. Stress distributions (Von Mises and Modified Von Mises) and strain were evaluated. Stress distributions were affected by the bracket presence and type. Models with metallic and ceramic bracket had higher stresses over a larger buccal enamel impact area. Models with ceramic brackets generated higher stresses than the metallic brackets. Mouthguards reduced the stress and strain values regardless of bracket type. Mouthguard shock absorption were 88.37% and 89.27% for the metallic and ceramic bracket, respectively. Orthodontic bracket presence and type influenced the stress and strain generated during an impact. Ceramic brackets generated higher stresses than metallic brackets. Mouthguards substantially reduced impact stress and strain peaks, regardless of bracket type.
Assuntos
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Braquetes Ortodônticos / Protetores Bucais Limite: Humanos Idioma: Inglês Revista: Braz Dent J Assunto da revista: Odontologia Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Brasil

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Braquetes Ortodônticos / Protetores Bucais Limite: Humanos Idioma: Inglês Revista: Braz Dent J Assunto da revista: Odontologia Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Brasil