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Introduction: Rhinolith is a petrea formation, relatively uncommon, which develops itself in the nasal cavity and it is rarely asymptomatic. It is formed from the deposition of organic and inorganic compounds,on a foreign body and it can initiate symptoms like runny nose, nasal obstruction, foul odor and epistaxis. As the rhinolith has evoluted, it can bring more grave complications as oronasal perforation and nasal septum deviation. The choice treatment is usually based on the surgical removal of the calcified mass. Objetive: This study aims at relating a rare case of asymptomatic rhinolithiasis accidentally diagnosed in the left nasal cavity of a 9-year-old child. Case Report: Male patient, 9 years old, under a dental treatment was sent by the clinician for the image exams achievement aiming at visualizing a supernumerary tooth located on the anterior maxilla region promoting the 21 dental tooth migration. The patient was subjected to a Computed Tomography Cone Beam.It was observed, on this exam, the presence of a supernumerary tooth in formation, a calcified mass on nasal cavitys upper third on the left side, with dimensions of 1cm width and 1,5 cm height and depth, promoting partial obstruction of oropharynx on the left side.It was also observed, adenoid hypertrophy. Conclusions: The case related showed how important are the image exams to do the precise diagnosis on this pathology, in order not to pass unnoticed during many years, thus leading the patient future serious complications.The recognition of this entity in routine radiographs exams, by the dental surgeon it is of a great importance for to the precosis diagnosis and tratment.

The formation of the tooth, called Odontogenesis, results from the interaction of the oral epithelium and the ectomesenchyma, where this complex process follows a histological pattern at each stage of this development, thus forming structures such as enamel, dentin, pulp, cementum, periodontal ligament and alveolar bone. And in determinatated circumstances, modifications in the process of tooth development alter the morphology of the tissues, forming dental anomalies such as twinning, fusion, concrescence and Dens in Dent (Invented Tooth). Therefore, the objective of this study is to report a rare case of the presence of associated dental anamolies, twinning and Dens in Dent, diagnosed by Cone Beam Computed Tomography (CBCT).

Introduction: Dens in dente or dens invaginatus is an anomaly of tooth formation, result of the invagination of coronary tissue in the pulp chamber, which occurs previously to tissue calcification. The majority of dens in dente cases are discovered by routine imaging exams, in which it is possible to identify an invagination of enamel into the pulp chamber, where the enamel appears well delineated, giving the impression of “a small tooth inside the other”. Objective: Approach the clinical and radiographic aspects, as well as diagnose this pathology using imaging exams, through an atypical clinical case report of Oehlers type II dens in dente in the left maxillary third molar. Case report: Female patient, 20 years old, went to the Dental Clinic of the Odontology Scholl at PUC Minas, to have the third molars extracted. The panoramic radiograph examination showed shape change in the left maxillary third molar. Considering the atypical form, a cone beam computed tomography was requested. Conclusion: The case related showed how important are the image exams to do the precise diagnosis on this anomaly. The cone bean computer tomo- graphy should be ask if the conventional imaging tests aren’t able to value the disease and plan the treatment.