title: Maxillary complete denture movement during chewing in  mandibular removable partial denture wearers.
abstract: OBJECTIVE
  To evaluate the pattern of maxillary complete denture movement during chewing for free-end removable partial dentures (RPD) wearers, compared to maxillary and mandibular complete denture wearers.
  
  
  METHODS
  Eighteen edentulous participants (group I) and 10 volunteers with bilateral posterior edentulous mandibles (group II) comprised the sample. Measures of mean denture movement and its variability were obtained by a kinesiographic instrument K6-I Diagnostic System, during the mastication of bread and a polysulphide block. Data were analysed using two-way ANOVA (alpha = 0.05).
  
  
  RESULTS
  Upper movement during chewing was significantly lower for group II, regardless of the test food. The test food did not influence the vertical or lateral position of the denture bases, but more anterior dislocation was found when polysulphide blocks were chewed. Group II presented lower intra-individual variability for the vertical axis. Vertical displacement was also more precise with bread as a test food.
  
  
  CONCLUSIONS
  It can be concluded that mandibular free-end RPD wearers show smaller and more precise movements than mandibular complete denture wearers.
authors: Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, SP, Brazil.
authors: Raphael Freitas
authors: RF
authors: de Souza
authors: Juliê
authors: J
authors: Marra
authors: Ana Carolina
authors: AC
authors: Pero
authors: Rômulo Rocha
authors: RR
authors: Regis
authors: Marco Antonio
authors: MA
authors: Compagnoni
authors: André Gustavo
authors: AG
authors: Paleari
mesh_terms: D000368:Aged; D001732:Bite Force; D001939:Bread; D003819:Denture Bases; D003779:Denture Design; D003781:Denture Retention; D003826:Denture, Complete, Lower; D003827:Denture, Complete, Upper; D003832:Denture, Partial, Removable; D005260:Female; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation; D008297:Male; D008334:Mandible; D008409:Mastication / Q000502:physiology*; D008875:Middle Aged; D009068:Movement; D013440:Sulfides
chemical_list: D013440:Sulfides; C032915:polysulfide