Diferenciação radiográfica da reabsorção óssea anterior na mandíbula, da extrusão dentária, em pacientes que apresentam a síndrome da combinação

Abstract

The first reference to the harmful effects of the combined use of dentures (PT) with upper removable partial denture (RPD) lower Kennedy Class I Ellisworth was reported by Kelly in 1972, which he called Syndrome Combination (SC). Knowing levels and regions in which bone loss occurs and / or repositioning teeth allows the identification of problems of prosthesis mismatch, and to establish a prognosis for the fabrication of new dentures. A comparison of conventional radiographic method with the clinical findings is useful to check the levels and patterns of bone loss. The objective of this study was to examine panoramic radiographs of patients with characteristics of patients with PH and to differentiate bone resorption extrusion of the remaining teeth in the jaw. For this, a method developed for observing and differentiating the extrusion of the lower anterior teeth and ridge resorption, there were analyzed 41 panoramic radiographs of edentulous patients total upper and lower partial class I Kennedy. The traces of the structures of interest were made on both sides of the images in the following pattern: a 1st line tangent to the condyle and the posterior border of the mandible and a 2nd line tangent to the base jaw, the point of intersection of the lines was linked with the corresponding point on the left side of the mandible a given 3rd line. It was found that this line coincides with the position of the anatomical neck of the mandibular anterior teeth (from canine to canine) in patients who do not have dental repositioning of the anterior teeth. The results showed that the mean right and left sides were statistically similar and comparison of both sides with an alveolar considered normal (with no resorption) showed significant differences between the results. Conclusion: As the proposed methodology, the panoramic radiographic examination could complement clinical observations of patients with KS providing conditions to establish a prognosis and planning an appropriate rehabilitation.