Abstract
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.
Highlights
SUMMARY: The aim of this study was to eualuate the preualence of open bite, deep bíte, cross-bíte, occurrerrce ofphysiolo gical d,íostema, premature dental loss and antero-posteríor arch relatíonship, ctccorcling to Angle's classifi,cation rufiífied to decídtnus dentitinn in children aged 3-5 years
The sample uas made up by 567 chiLclren, 294 males and 273femcrla, who uere registererl ín public schools ín the cíty of Pono
The resuhs indicated that the anteior open bíte has a híghfrequency ín clecid,uous dentítíon (38.80%o) that in posteior open bite was not sígnifi,cant (0,350/o)
Summary
RESUMO O objetivo desta pesquisa foi avaliar a prevalência de mordida aberta, sobremordida exagerada, mordida cruzada, tipo de arco, segundo Baume, perdas precoces e relação antero-posterior dos arcos, segundo a Classificação de Angle modificada para a dentadura decídua na faixa etária de 3 a 5 anos. A prevalência de mordida cruzada nessa fase da dentição é de 17,46%, sendo que a mordida cruzada posterior unilateral apresenta o índice mais elevado (9,35%). As maloclusões são desarmonias dos dentes e/ou bases ósseas que se estabelecem tanto na dentição decídua quanto na dentição permanente. Entre as maloclusões encontradas na dentição decídua que têm sua prevalência descrita neste trabalho, estão a mordida aberta, a sobremordida exagerada, a mordida cruzada, bem como as relações antero-posteriores entre os maxilares, adaptadas da Classificação de Angle (1907) para a dentição decídua, Classe I, II e III.
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