Estudo comparativo da estabilidade dimensional de moldes de alginato pelo método fotográfico

• Autor(a) principal: Arikawa, Yara Matsu Torres [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155314; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-05-03/000881562.pdf
• topic: Alginatos; Materiais para moldagem odontológica; Precisão da medição dimensional; Alginates

The objective of this study was to analyze linear dimensional changes of three brands of alginate, two with extended setting time (Cavex Color Change and Hydrogum 5) and a conventional (Jeltrate dustless) in four periods (0, 8, 32 and 80 hours) through photographic method, and compare to a standard pattern analyzed by two segments: between the first premolars (B) and between the second molar (A). Material and methods: A model in acrylic resin, which served as the standard for obtaining the molds studied was obtained from a superior dentate mouth . Tags were entered on teeth 14, 17, 24 and 27 and it served as a measurement reference. A acrylic resin tray was used to produce five molds for each alginate, one at a time, photographed in the stand and Nikon D50 camera with predetermined distance for all pictures. The images were measured in Corel Draw program. Based on the values obtained from the molds, and the standard model was possible to establish the linear dimensional changes that have occurred in the three brands of alginate, at the appointed times. Results: Among the brands studied the Hidrogum 5 showed the minor changes but the differences were not statistically significant. Conclusion: It was concluded that the linear dimensional stability of the molds of the three studied alginates are inserted at an acceptable level to produce appropriate models and that there was no statistically significant difference between them