With time, the upper denture required greater functionality and esthetics in concordance with changes and requirements of remaining tissue, therefore, present retention was no longer sufficient Figure 4.
Considerando la dentadura superior, en determinado tiempo, necesitó mayor funcionalidad y estética, de acuerdo a los requerimientos y cambios del tejido remanente; por lo que dicha retención ya no era suficiente Figura 4.