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Background: The mandibular incisive canal (MIC) is an anatomic structure to be considered in treatment planning for surgeries in the anterior region of the mandible. Awareness of the MIC increased with the use of 3D imaging for treatment planning, such as cone beam computed tomography (CBCT). This study aimed to use CBCT to assess the prevalence, morphology and position of the MIC among North-Brazilians. Material and Methods: The sample consisted of CBCT scans of 100 hemi-mandibles (50 individuals) that were assessed for the absolute (n) and relative frequency of the MIC. The morphological component of this study was the diameter (mm) of the detected MIC in five anatomic sites between the mental foramen and the midline. Within the interformainal region, the position of the MIC was assessed by measuring (mm) the distances between the MIC and the basal, vestibular and lingual cortical bone surfaces. Results: The prevalence of the MIC was >76% considering the different anatomic regions screened in CBCT. The mean diameter of the MIC progressively reduced from 1.29 mm to 0.86 throughout the five anatomic regions measured. The position of the MIC showed a downward trajectory away from the lingual cortical bone surface. Conclusions: MIC was a highly prevalent anatomic structure in the studied sample. The funnel-shaped outline of the MIC and its trajectory into the interforaminal region highlighted a major risk of damage to the neurovascular bundle in surgeries (e.g. implant placement) that are close to the mental foramen and the vestibular cortical bone. Key words:Anatomy, cone beam computed tomography, imaging, mandibular incisive canal, oral radiology.

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Central giant cells lesion (CGCL) is defined as a benign intraosseous destructive pathology. It is classified as aggressive or nonaggressive, depending on their clinical, imaginologic, and histological behavior. The behavior, location, and extension of the lesion added to the patient's age will determine the choice of the treatment, either surgical or clinical. Thereby, the aim of this work is to review the literature related to the CGCL, as well as to present a clinical case report of a 22-year-old female patient, affected with an injury on the left side of her jaw. After the diagnosis, it was decided to carry out a conservative treatment with intralesional injections of triamcinolone (10 mg/ml). The injections were performed once a week for 6 weeks. The progress of the patient was satisfactory, and after 4 years, it has been observed through imaging and clinical bone formation examinations with complete remission of the injury and no signs of recurrence.

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O ameloblastoma é o tumor odontogênico de origem epitelial, de maior significado clínico dos ossos gnáticos. A variante unicística está de 10 a 46% dos casos dos ameloblastomas intraósseos. Devido às suas características, a abordagem terapêutica do ameloblastoma, ainda, é controversa, sendo classificada em radical ou conservadora, cada qual com suas vantagens e desvantagens. Na escolha da abordagem cirúrgica, vários fatores devem ser levados em consideração, como localização, extensão, características histopatológicas, idade, entre outros. Este trabalho tem como objetivo demonstrar um caso de abordagem conservadora de um ameloblastoma unicístico com proliferação mural em paciente jovem. Ele queixava-se de aumento de volume em face, em região posterior esquerda de mandíbula. Os exames clínicos, radiográficos e histopatológicos confirmaram o diagnóstico de ameloblastoma unicístico do subtipo mural. Por se tratar de um paciente jovem e com uma lesão benigna, mas com caráter infiltrativo, foi submetido à marsupialização com posterior enucleação associada à ostectomia periférica e tratamento do leito cirúrgico com solução de Carnoy. O paciente encontra se atualmente em rígido controle clínico-radiográfico com doze meses de pós-operatório, observando-se, diante do tratamento eleito, relevante neoformação óssea e regressão total da lesão... (AU)

Ameloblastoma is the odontogenic epithelial origin tumor with the most common clinical significance of the gnatic bones. The unicystic variant is between 10 and 46% of cases of intraosseous ameloblastomas. Due to its characteristics, the therapeutic approach of ameloblastoma is still controversial being classified as radical or conservative, each with its advantages and disadvantages. In choosing the surgical approach, several factors must be taken into account such as location, extent, histopathological characteristics, age among others. This work aims to demonstrate a case of a conservative approach of a unicystic ameloblastoma with mural proliferation in a young patient. The same complained of volumetric increase in the face and posterior region of mandible. Clinical, radiographic and histopathological exams confirmed the diagnosis of unicystic ameloblastoma with the mural subtype. Because it is a young patient with a benign but infiltrative lesion, he was submitted to marsupialization with subsequent enucleation associated with the peripheral osteotomy and treatment of the surgical bed with Carnoy's solution. The patient is currently in rigid clinical-radiographic control with twelve months after surgery we observe, with the chosen treatment, relevant bone neoformation and total regression of the lesion... (AU)

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Mucocele é uma lesão oral, que ocorre a partir do acúmulo de mucina nos tecidos moles, por retenção ou extravasamento. Este último, o mais comum, ocorre, principalmente, após trauma mecânico, cujo ato resulta em rompimento do ducto da glândula salivar. O presente trabalho tem como objetivo relatar um caso de mucocele de tamanho atípico, em uma paciente de 28 anos. A abordagem clínica do caso, bem como o tratamento serão discutidos... (AU)

Mucocele is an oral injury that occurs from the mucin accumulation in soft tissue for retention or extravasation. The last, the most common, mainly occurs after mechanical trauma act which results in disruption of the salivary gland duct. This study has the purpose to report a case of atypical size of mucocele in a 28-year-old patient. The clinical approach of the case, and the treatment will be discussed... (AU)

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O objetivo deste trabalho foi avaliar as inclusões dentárias, segundo a classificação de winter, utilizando as imagens panorâmicas das tomografias computadorizadas de pacientes atendidos na Policlínica Odontológica da Universidade do Estado do Amazonas. A amostra contou com pacientes entre 18 e 40 anos de ambos os gêneros no período de junho de 2013 a março de 2014. Segundo Winter, os terceiros molares inclusos de acordo com a inclinação do seu longo eixo em relação ao segundo molar, em vertical, mesioangular, distoangular, horizontal e invertida. No estudo, foi verificada a posição mais frequente tanto para maxila quanto para mandíbula e a inclinação mais predominante para o gênero masculino e o feminino. Foram analisadas 100 imagens panorâmicas que continham, pelo menos, um dente incluso, das quais 54 pertenciam ao gênero masculino e 37, ao feminino. As inclusões dentárias mais prevalentes em ordem decrescente foram a vertical com 42.8%, mesioangular com 33.5%, distoangular com 22.4% ,e horizontal com 1.3%. A posição mais predominante para maxila foi a vertical e, na mandíbula, foi a mesioangular. Quanto ao gênero tanto para o masculino quanto para o feminino, a inclinação mais frequente para maxila foi a vertical, seguida da mesioangular na mandíbula... (AU)

The aim of this study was to evaluate dental inclusions according to the classification of Winter using the panoramic images of CT scans of patients on dental Polyclinic of the University do Estado do Amazonas. The sample included patients between 18 and 40 years of both genders in the June period 2013 to March 2014. The classification of winter sorts the third molars according to the inclination of his long shaft in relation to the second molar, in vertical, angular mesial, angular distal, horizontal and inverted. The study found that the most common position for both maxilla and mandible, and the most prevalent inclination to the male and female gender. Were analyzed 100 panoramic images that contained at least one tooth included, of which 54 were male and 37 female. The most prevalent dental inclusions in descending order were the vertical with 42.8%, 33.5% angular mesial, angular dist 22.4% and horizontal with 1.3%. The most prevalent position for the jaw was the vertical, and for the mandible was the mesial angular. As for the genre, for both the male and female, the most frequent inclination to the jaw was the vertical, followed by the angular mesial in the mandible... (AU)

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Gorham's disease (Gorham-Stout syndrome) is a rare condition of unknown etiology involving a localized endothelial proliferation of lymph vessels resulting in destruction with bone resorption. The syndrome is rarely seen in the facial skeleton and has a large variety of prognoses and treatments. A case of this syndrome in a 9-year-old boy is presented. The clinical aspects are described, together with the treatment involving zoledronic acid. Other treatments described in the literature are reviewed. The authors believe that this report is one of the first cases in which a child afflicted in the first decade of life survives.

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