Maxillary complete denture movement during chewing in  mandibular removable partial denture wearers.
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.
de Souza
Raphael Freitas
RF
Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, SP, Brazil.
Marra
Juliê
J
Pero
Ana Carolina
AC
Regis
Rômulo Rocha
RR
Compagnoni
Marco Antonio
MA
Paleari
André Gustavo
AG
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
D013440:Sulfides; C032915:polysulfide