Effect of different impression techniques and elastomeric impression materials on the dimensional accuracy of partially edentulous mandibular arch

Authors

  • Rafael Pino Vitti Universidade Estadual de Campinas
  • Adriano Relvas Barreira de Oliveira Pontifícia Universidade Católica do Rio de Janeiro
  • Mário Alexandre Coelho Sinhoreti Universidade Estadual de Campinas

DOI:

https://doi.org/10.20396/bjos.v15i3.8649995

Keywords:

Dimensional accuracy. Silicone elastomers. Dental impression technique.

Abstract

Aim: Evaluate the dimensional accuracy of stone casts of a partially edentulous mandibular arch made by two impression techniques (1-step putty/light-body and 2-step putty/light-body) using addition and condensation silicones. Methods: A partially edentulous steel stainless cast with four markings on teeth 33, 37, 43, and 47 was used to obtain the impressions. The transverse (33-43 and 37-47) and anteroposterior (33-37 and 43-47) distances were measured by measuring microscope (30x magnification; 0.5μm accuracy). For the 1-step putty/light-body technique, both viscosities of the impression materials were handled together. For the 2-step putty/light-body technique, the impression materials of different viscosities were handled separately and a polypropylene spacer (2 mm thick) was used to create a relief. The same distances were measured om stone casts (n = 5). The values were submitted to normality test (Kolmogorov-Smirnov) and analyzed statistically by three-way ANOVA and Tukey’s (5%). Results: All distances showed shrinkage (negative linear changes). The addition silicones showed better accuracy than condensation silicones (p<0.05) and no significant difference was found between the impression techniques (p>0.05). The edentulous zone (43-47) presented worst dimensional accuracy results. Conclusions: The accuracy of the castsis more related to the impression material than impression technique.

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Author Biographies

Rafael Pino Vitti, Universidade Estadual de Campinas

Possui graduação em Odontologia pela Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas (2006), mestrado em Materiais Dentários pela Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas (2009), doutorado em Materiais Dentários pela Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, com período de estágio de doutoramento no Dipartimento di Scienze Odontostomatologiche, Università di Bologna (2013) e pós-doutorado (Fundação de Amparo à Pesquisa do Estado de São Paulo - FAPESP) em Materiais Dentários pela Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas (2015). 

Adriano Relvas Barreira de Oliveira, Pontifícia Universidade Católica do Rio de Janeiro

Possui graduação pela Universidade do Estado do Rio de Janeiro (2005), especialização pela Pontifícia Universidade Católica - RJ (2010) e mestrando em Odontologia na Universidade de Taubaté - SP (sub área Prótese Dentária). Docente do curso especialização de Prótese Dentária da Pontifícia Universidade Católica do Rio de Janeiro e 1º Tenente Cirurgião Dentista da 4ª Odontoclínica do Corpo de Bombeiro Militar do Estado do Rio de Janeiro.

Mário Alexandre Coelho Sinhoreti, Universidade Estadual de Campinas

O referido professor graduou-se em Odontologia pela Universidade Estadual de Campinas no ano de 1991. Em 1995, defendeu sua dissertação de Mestrado em Materiais Dentários pela Universidade Estadual de Campinas. Nesse mesmo ano, foi contratado como professor assistente na Área de Materiais Dentários da Faculdade de Odontologia de Piracicaba - UNICAMP. Em 1997, concluiu seu doutoramento também no Programa de Materiais Dentários da Universidade Estadual de Campinas. No ano de 2001, realizou sua Livre-Docência na Faculdade de Odontologia de Piracicaba-UNICAMP.

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Published

2017-08-11

How to Cite

1.
Vitti RP, Oliveira ARB de, Sinhoreti MAC. Effect of different impression techniques and elastomeric impression materials on the dimensional accuracy of partially edentulous mandibular arch. Braz. J. Oral Sci. [Internet]. 2017Aug.11 [cited 2021Dec.7];15(3):238-41. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8649995

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