Prevalência de maloclusão na dentição decídua
The aim of this study was to evaluate the prevalence of open bite, deep bíte, cross-bíte, occurrerrce of physiolological diastema premature dental loss and antero-posteríor arch relatíonship, according to Angle's classification modified to deciduous dentition in children aged 3-5 years. The sample was made up by 567 children, 294 males and 273 females who where registred ín public schools ín the cíty of Porto Alegre RS. The results indicated that the anterior open bíte has a híghfrequency ín deciduos dentítíon (38.80%) that in posteior open bite was not significant (0,35%) Deep bite presents a rate of 24.52%. The prevalence of cross-bíte ín this stage of dentítíon is I7,46%. whích unilateral posteior cross-bíte has the híghest rate (9.35%). The more prevalent arch Type is the Baume's Type I arch, found ín 73.19% of the sample. Observing the antero-posteior arch relationship, the rate of 64.20% was obtained to Class I, 18.52% to Closs II maloccluion and finally 17.28% to Class III maloccluion.