Aspectos imaginol�gicos do cisto dent�gero por meio de resson�ncia magn�tica e ultrassonografia

Magnetic resonance imaging (MRI) is a type of imaging examination considered as gold standard in the analysis of the internal structure and content of intra-osseous lesions. Because of the inherent characteristics of acquisition, MRI allows determining the nature and differential diagnosis among alterations that have aspects similar to those of other imaging modalities, such as radiographs and computed tomography (CT). Moreover, MRI main advantage is to be a non-invasive method, because it does not use ionizing radiation. Both ultrasound (US) and MRI provides images without showing deleterious effects to living organisms, enabling the differentiation between solid and cystic lesions, but US lacks to provide comprehensive anatomical detail and information about the chemical composition of the lesions as MRI, which would be crucial in determining the lesion diagnosis. This paper reports the clinical case of a child exhibiting dentigerous cyst along the whole extension of the right maxillary sinus with extensive tooth displacement, aiming to emphasize the use of both MRI and US in the diagnosis of dentomaxillofacial lesions.