The basis of radiographic interpretation is knowledge of the bone anatomy of the maxilla and mandible. It is necessary to point outnormality and its variations in order to recognize any pathology. The radiograph is a two dimensional projection, originated from thesuperimposition of tridimensional structures with alteration of their shapes and dimensions. Differential diagnosis between radiographicimages of normal bone anatomy and pathological bone processes is made based on previous knowledge

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... radiographic data which are subject of the present text. The anatomic structures of the maxilla and mandible pointed out are those capable of being confused in differential diagnosis.