O sorriso gengival - tratamento basedo na etiologia: uma revisão de literatura / The gummy smile – treatment based on etiology: review

O sorriso gengival é definido pela exposição excessiva de gengiva maxilar durante o sorriso. A etiologia do sorriso gengival é variada e sua correta identificação é fundamental para confecção de um plano de tratamento eficaz. Para podermos diagnosticar precisamente o fator causador preponderante em cada caso, alguns aspectos clínicos devem ser avaliados. São esses: saúde periodontal, exposição dentária durante repouso, análise dimensional e funcional do lábio superior, mensuração da coroa clínica dos incisivos e caninos e harmonia entre os planos oclusais anteriores e posteriores. Este artigo tem como objetivo revisar literatura atual acerca dos fatores etiológicos do sorriso gengival (Hiperplasia gengival, Extrusão Dento-Alveolar anterior, Excesso Vertical de Maxila (VME), e Lábios superiores curtos ou hiperativos durante o sorriso, erupção passiva alterada) assim como da semiotécnica relacionada, visando auxiliar o cirurgião dentista na tomada de decisão e no estabelecimento do plano de tratamento adequado para cada uma essas etiologias.

The gummy smile is an excessive maxillary gingival display during the smile. The etiology of the gummy smile is varies and its correct definition is principal for making an effective treatment plan. In order to accurately diagnose the main causer factor in each case, some of clinical aspect must be evaluated. Are these: periodontal health, dental exposure at rest, dimensional review and upper lip functional, measurement of the clinical crown of the incisor and canine and harmonious occlusal planes. The goal of this article is to review the actual etiological factors of the gummy smile (Gingival hyperplasia, anterior incisor overeruption, vertical maxillary excess (VME), and short upper lip or hyperactive mobile upper lip during the smile and altered passive eruption), as the semi- technical related, to assist dentist to make decisions and to establish the appropriate treatment plan for each of these etiologies.

Utilization of the coconut shell of babaçu (Orbignya sp.) to produce cement-bonded particleboard.

This experiment evaluated the use of the material of the outer coconut shell of babaçu (Orbignya sp.), a palm tree from Brazil, for the manufacture of particleboards bonded with Portland cement. Four treatments were analyzed at two target densities (1.2 g/cm3 and 1.4 g/cm3) and two levels (0% and 4%) of addition of calcium chloride. The lignocellulosic material from babaçu presented a low cement inhibition index according to the hydration test. Testing of manufactured panels showed that good physical and mechanical properties were achieved at the treatment levels tested.