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International journal of odontostomatology

versión On-line ISSN 0718-381X


ALVES, Nilton  y  NASCIMENTO, Carlos Manuel de Oliveira. Study of the Mucosa Thickness of the Retromolar Triangle to Facilitate the Installation Planning of Mini-Implants in the Region. Int. J. Odontostomat. [online]. 2012, vol.6, n.2, pp.175-179. ISSN 0718-381X.

The retromolar triangle is a triangular area located in the mandible, posteriorly to the last molar. This region, due its thickness and bone density, is widely used for the installation of devices that provide an anchorage system for the movement of the lower molars. The aim of this research is to provide morphometric data of the mucosa thickness of the retromolar triangle. Twenty-five patients of portuguese nationality, with indication for extraction of the impacted lower third molar (right and/or left), were studied. In the region of the retromolar triangle were demarcated 3 points corresponding to the vertices of a triangle whose the base was torned for the distal face of the lower third molar and the lenght of the sides corresponded to vestibulolingual dimension of the same tooth, then was demarcated a fourth point corresponding to the geometric center of the triangle. Then, using a finger spreader with silicone stop were measured the mucosal tickness at each point. The data obtained were tabulated and analyzed. The lowest average value found was 5.5mm on the right side and the highest average value found was 7.13mm on the left side. Considering the mean values obtained at the points of the retromolar triangle mucosa measured in this study, we conclude that the retromolar triangle shows thick mucosa, so the mini-implants indicated for this region should have a long transmucosal neck.

Palabras clave : retromolar triangle; mini-implants; morphometry.

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