Resumen: la causa del exceso de encía al sonreír depende de múltiples factores, como el exceso de dimensión vertical del maxilar superior, las malposiciones dentarias debidas a una gran sobremordida o la presencia de una erupción pasiva alterada. Esta última entidad clínica, que a menudo pasa inadvertida a pesar de su alta prevalencia, puede condicionar de forma importante la estéti-ca de la sonrisa.En este artículo se analiza la forma de realizar un diagnóstico correcto de esta alteración, lo cual será esencial para elegir la mejor corrección de cada caso en concreto, generalmente mediante técnicas de cirugía periodontal. Se describen dichas opciones terapéuticas y finalmente se incluyen unos casos clíni-cos a modo de ejemplo de tratamiento de dicho proceso en el que, aparte de existir implicaciones patológicas, la estética juega un papel determinante.Palabras clave: Sonrisa gingival, Erupción pasiva alterada, Cirugía periodontal. Abstract:Gum overexposure when smiling is caused by multiple factors. Factors range from excessive superior jaw vertical dimension, poorly positioned teeth due to overbite or due to the presence of delayed passive eruption. This last clinical term, which often goes unnoticed even though it is highly common, can seriously determine the aesthetics on the smile.This article analyses the ways of correctly diagnosing this alteration. It is essential to choose the most appropriate procedure for each case, usually being periodontal surgery. A number of therapeutic options are described and some clinical cases are included as treatment examples. Apart from the existence of pathological implications, aesthetics plays an important role.
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