title: Effect of monomer content in the monomer-polymer ratio on complete denture teeth displacement.
abstract: The purpose of the study was to verify the linear displacement of teeth in maxillary complete dentures influenced by different monomer-polymer ratios - according to the manufacturer's instructions, with 25% excess or 25% less monomer content - in the conventional and microwaved polymerization techniques. Wax base plates and wax planes were made on edentulous maxillary stone casts according to traditional method. The set was assembled in semi-adjustable articulator with a lower toothed stone cast as guide to mounting of the maxillary artificial teeth. Impressions were taken from this tooth arrangement with silicone and the mold was used to standardize the mounting of the teeth of all dentures. Referential points were made on the artificial teeth for linear measurements with optical microscope before processing of the dentures and after deflasking. Denture bases were conventionally packed with acrylic resin according to the monomer-polymer ratio protocol. Tooth displacement data were submitted to ANOVA and Tukey test (α=0.05). There were no statistically significant differences (p>0.05) between the group with monomer content recommended by the manufacturer and groups with 25% more and 25% less monomer, in both conventional and microwaved polymerizations. Excess or less monomer in the monomer-polymer ratio and polymerization types did not change the linear distance between teeth.
authors.affiliation: Piracicaba Dental School, UNICAMP - University of Campinas, Piracicaba, SP, Brazil.
authors.forename: Michelle Cristina
authors.initials: MC
authors.lastname: Lopes
authors.forename: Rafael Leonardo Xediek
authors.initials: RL
authors.lastname: Consani
authors.forename: Marcelo Ferraz
authors.initials: MF
authors.lastname: Mesquita
authors.forename: Mário Alexandre Coelho
authors.initials: MA
authors.lastname: Sinhoreti
authors.forename: Simonides
authors.initials: S
authors.lastname: Consani
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001641:Bicuspid; D003725:Dental Articulators; D003735:Dental Casting Technique; D003764:Dental Materials / Q000737:chemistry*; D003819:Denture Bases; D003779:Denture Design; D003827:Denture, Complete, Upper; D006358:Hot Temperature; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D008872:Microwaves; D003765:Models, Dental; D008963:Molar; D058105:Polymerization; D013499:Surface Properties; D014093:Tooth, Artificial
chemical_list: D000180:Acrylic Resins; D003764:Dental Materials; C539101:vipi cril; C539102:vipi wave