Tomografia computadorizada de cone Beam no diagnóstico de reabsorções radiculares externas

Abstract

Resorption is the term used in medical and dental literature to define the process which mineralized tissues are destroyed and eliminated by aclastic cells. Dental resorptions can be classified according to the affected dental surface (internal, external, internal-external), process evolution (transient or progressive) and the biological nature of the process (inflammatory or replacement). Dental trauma represents the most frequent cause of progressive external root resorption in the permanent dentition not rare resulting in irreversible loss of dental tissue that can lead to tooth loss. Considering that root resorptions are asymptomatic events, imaging procedures are essential in the diagnosis of such pathologies. Traditionally, these complementary examinations were performed through conventional and later digital radiographs. However, images provided through radiographs present some limitations, such as overlaps, distortions and a two-dimensional image of a threedimensional structure. In order to overcome these limitations, the multiplanar images have been widely used, among them the computerized tomography of cone beam. Therefore, the present study aimed to review the use of CBCT to improve diagnosis and treatment planning of external root resorption. CBCT imaging appears to provide a superior validity and reliability in the detection of inflammatory external root resorption. The superior accuracy of CBCT imaging may result in the early detection of IERR and may help to determine their exact locations and extents. The smaller the voxel size the greater the accuracy of the exam, being important to identify small cavities in the apical region. However, literature is dominated by ex vivo studies and does not distinguish between different types of RER.