Influence of posterior palatal seal in the adaptation of complete denture bases


  • Rodrigo Luiz dos Santos Sousa State University of Campinas
  • Célia Marisa Rizzatti-Barbosa State University of Campinas
  • Cristiane Machado State University of Campinas
  • Fábio Alves Jóia State University of Campina
  • Laís Regiane Silva State University of Campinas
  • Margarete Cristiane Ribeiro State University of Campinas



Denture base. Posterior seal. Adaptation


This work evaluated the influence of posterior palatal seal in the adaptation of complete denture bases. For that, 20 plaster models were made in equal dimensions and divided in 2 groups, according to the following characteristics: Group A - posterior palatal surface without depressions. Group B - presented a depression in the posterior palatal region (form of M) with approximately 1mm of depth, 35 mm of length (between the maxillary tuberosities) and 3 mm of thickness, so that the line between the hard and soft palate was the posterior limit. An acetate base, with 1.5 mm of thickness, was plasticized on the models in a vacuum plasticizer. The samples were enclosed in metallic flasks; heat-cured acrylic resin was manipulated and processed in water bath (74ºC during 9 hours). After that, each plaster model and respective resin base were fixed with instantaneous adhesive and transversally sectioned at the posterior palatal region. The adaptation level was measured on an Olympus linear comparator microscope (Japan). The data were submitted to ANOVA and Tukey’s test (5% significance). There was no significant statistical difference for the average of adaptation between group A (0.075 mm) and group B (0.071 mm). It could be concluded that posterior palatal seal did not influence in the adaptation of the complete denture bases analyzed.


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Author Biographies

Rodrigo Luiz dos Santos Sousa, State University of Campinas

Possui graduação em Odontologia pela Universidade Federal do Rio Grande do Norte(1997), especialização em Prótese Dentária pela Universidade Estadual Paulista Júlio de Mesquita Filho(2000), mestrado em Clínica Odontológica pela Universidade Estadual de Campinas(2002), doutorado em Clínica Odontológica pela Universidade Estadual de Campinas(2004), ensino-fundamental-primeiro-graupelo Colégio Salesiano São José(1987), ensino-medio-segundo-graupelo Colégio Salesiano São José(1991), aperfeicoamento em Oncologia Oral pelo Departamento de Ensino Pesquisa e Educação Comunitária(1995), aperfeicoamento em Prótese Fixa Função e Estética pela Universidade Estadual Paulista Júlio de Mesquita Filho(1998) e aperfeicoamento em Prótese Sobre Implante pelo Centro Bauruense de Estudo Odontológico(2000). 

Célia Marisa Rizzatti-Barbosa, State University of Campinas

Graduate at Odontologia from Universidade Estadual Paulista Júlio de Mesquita Filho (1980), master's at Odontology from Universidade Estadual de Campinas (1992) and ph.d. at Odontology from Universidade de São Paulo (1995). Has experience in Odontology, focusing on Clinical Odontology, acting on the following subjects: resina acrílica, processamento, prótese, resina acrilica and protese.

Fábio Alves Jóia, State University of Campina

has graduation at Curso de Odontologia by Centro Universitário Herminio Ometto de Araras (2000) , specialization at Curso de Especilaização em Prótese Dentária by Universidade Estadual de Campinas (2002) and master's at Clínica Odontológica by Universidade Estadual de Campinas (2005) . Has experience in the area of Odontology , with emphasis on Clínica Odontológica. Focused, mainly, in the subjects: Resina acrílica, Alteração linear, Próteses totais e Técnicas de inclusão.


Laís Regiane Silva, State University of Campinas

raduação em Odontologia pela Universidade Estadual de Campinas (2000). Possui Mestrado e Doutorado em Clínica Odontológica, área de concentração Prótese Dental pela Universidade Estadual de Campinas (2001/ 2006). Atuou em estágio docente na Clínica Odontológica em disciplinas da Graduação - Atividades Clínicas (FOP/UNICAMP) de 2001 a 2006. Atuou como Pesquisadora Colaboradora na FOP - UNICAMP, exercendo atividades de pesquisa e docência (2006/2008).

Margarete Cristiane Ribeiro, State University of Campinas

Possui graduação em Odontologia pela Universidade Estadual de Campinas(2000). Atuando principalmente nos seguintes temas:Mufla monomaxilar, Mufla bimaxilar, Resina de Microondas, Propriedades físicas da resina.


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How to Cite

Sousa RL dos S, Rizzatti-Barbosa CM, Machado C, Jóia FA, Silva LR, Ribeiro MC. Influence of posterior palatal seal in the adaptation of complete denture bases. Braz. J. Oral Sci. [Internet]. 2015 Nov. 12 [cited 2022 Nov. 29];2(7):357-60. Available from:




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