Análise por computação gráfica das alterações produzidas em próteses totais superiores imersas diretamente em água e pela termociclagem

• Autor(a) principal: Gennari Filho, Humberto [UNESP]
• Data de Publicação: 2010
• Outros Autores: Amoroso, Andressa Paschoal [UNESP], Mazaro, José Vitor Quinelli [UNESP], Alves, Luciana Mara Negrão [UNESP], Silva, Cristina Ramos [UNESP], Goiato, Marcelo Coelho [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://apcdaracatuba.com.br/revista/Volume_31_02_Jul_2010/v31n2.htm; http://hdl.handle.net/11449/133212
• topic: Denture complete; Polymethyl methacrylate; Tooth artificial; Polymerization; Dentadura completa; Polimetil metacrilato; Dente artificial; Polimerização

Objectives: This study aimed to assess dimensional changes in acrylic resin base and artificial teeth position after water storage and thermocycling using computer graphics measurements. Methods: Twenty-four waxed replicas were obtained from a previous upper complete denture. For linear measurements, points in cusps tips of left central incisor and second premolars and molars were marked in one of the prostheses with graphite and transferred to the others using an acrylic resin guide. The prostheses were scanned after waxing, polymerization and treatments and the images were exported to “AutoCad 2002 Today®” software for measurements. Results: There was no statistically significant difference in changes of each segment for each group and between the phases evaluated after polymerization and thermocycling. In groups I and III, the values after polymerization are higher than those after treatment, which suggests shrinkage while the prostheses in group II have expanded. Conclusion: The three groups exhibited artificial teeth movement after tests in comparison to the polymerized prosthesis. The prostheses submitted to water storage in kiln at 36ºC during seven days showed different behavior than the other groups.