An Uncommon Occurrence of Three-Fourth Molars Concomitant to Hypodontia in a Nonsyndromic Patient.

Bilaterally mandibular and maxillary fourth molars, concomitant to hypodontia, are uncommon. These dental anomalies, called hypohyperdontia, are rare and etiology is not well defined. Several complications may occur as a consequence of supernumerary teeth, such as teeth impaction, resorption of adjacent teeth, and development of cysts and tumors. The authors present an uncommon occurrence of three-fourth molars concomitant to hypodontia and dentigerous cyst associated with impacted mandibular second and third molars in a nonsyndromic patient. The authors attempt to discuss the occurrence of bilaterally fourth molars and reinforce the importance of clinical approach, considering risks and benefits for the patient.

Conhecimento dos alunos de Odontologia na identificação do câncer oral / Knowledge of dental students on the identification of oral cancer

Objetivo: Este estudo buscou avaliar o conhecimento e as percepções dos estudantes de Odontologia sobre o câncer oral, nas quatro faculdades de Odontologia do estado do Espírito Santo. Material e Métodos: Um questionário objetivo composto por 16 perguntas foi aplicado presencialmente aos alunos matriculados nos dois últimos períodos de Odontologia das respectivas instituições mediante assinatura do termo de consentimento livre e esclarecido. Resultados: Os dados obtidos revelam que, dos 196 participantes voluntários, 94,9% acreditam ser responsáveis pelo diagnóstico e prevenção do câncer oral, 67,3% consideram seu grau de conhecimento sobre o assunto insuficiente ou mediano e 53,6% não reconhecem, com precisão, os principais fatores de risco para este câncer. Conclusão: Esses achados reiteram a importância de instruir e capacitar o cirurgião-dentista, desde a sua formação, sobre o tema câncer oral, a fim de que estes sejam profissionais aptos a intervir, diagnosticar e prevenir essa enfermidade.

Objective: This study assessed the knowledge and perceptions of dental students about oral cancer in the four dental schools in the state of Espirito Santo. Material and Methods: A 16-question questionnaire was given to the participants after agreeing to informed consent. All participants were students enrolled in the last two semesters of dental school. Results: The results showed that among 196 participants, 94.9% believed they were responsible for the diagnosis and prevention of oral cancer, 67.3% considered their level of knowledge on the subject insufficient or moderately sufficient and 53.6% did not recognize with precision the main risk factors for oral cancer. Conclusion: These findings reaffirm the importance of proper instruction in diagnosing oral cancer in dental school in order for graduates to be able to properly diagnose and prevent the disease.

Hyperplastic dental follicle: a case report and literature review.

Hyperplastic dental follicle is an odontogenic hamartomatous lesion associated with delayed or tooth eruption failure in young patients. The occurrence of this pericoronal dental lesion may be single or multiple and it seems to be more frequent than literature has reported. We present a literature review focusing on the etiopathogenesis and clinicopathological features of this hamartomatous lesion in young patients. In addition, we reported a case of hyperplastic dental follicle causing delayed tooth eruption of 14-year-old male patient. Microscopic analyses based on routine staining and immunohistochemistry were used to discuss the cells found in pericoronal follicle. This paper reinforces the importance of association between clinical history and radiographic features with microscopic pericoronal follicle examination for diagnosis of this hamartomatous lesion.

Comparison of radiographic measurements obtained with conventional and indirect digital imaging during endodontic treatment.

The aims of this study were to evaluate the quality of indirect digitized radiographic images taken during endodontic procedures and to compare the measurements recorded with this technique to those obtained from conventional radiographs. Two-hundred conventional periapical radiographs taken at the undergraduate Endodontics Clinic of the Dental School of Bauru were digitized. The conventional and indirect digitized images were compared by three examiners as to the quality and accuracy of the measurements recorded during endodontic treatment, in canal length determination, gutta-percha adaptation, lateral condensation and final obturation. The conventional radiographs were observed on a film viewer, surrounded by a dark card, and measured with magnifying glass and a millimeter ruler; the indirect digitized images were evaluated on the Digora for Windows software, with free utilization of the bright/contrast tool. Unlike the conventional radiographic images, all indirect digitized images were considered as having a high quality. The distance between the filling material and the root apex was 0.117 mm larger, on average, for the Digora system (p<0.01). The measurements achieved by the investigated radiographic methods were clinically similar and they are thus equivalent. Changes in brightness and contrast of the images using Digora software improved the diagnosis.

Comparison of radiographic measurements obtained with conventional an indirect digital imaging during endontic treatment

The aims of this study were to evaluate the quality of indirect digitized radiographic images taken during endodontic procedures and to compare the measurements recorded with this technique to those obtained from conventional radiographs. Two-hundred conventional periapical radiographs taken at the undergraduate Endodontics Clinic of the Dental School of Bauru were digitized. The conventional and indirect digitized images were compared by three examiners as to the quality and accuracy of the measurements recorded during endodontic treatment, in canal length determination, gutta-percha adaptation, lateral condensation and final obturation. The conventional radiographs were observed on a film viewer, surrounded by a dark card, and measured with magnifying glass and a millimeter ruler; the indirect digitized images were evaluated on the Digora® for Windows software, with free utilization of the bright/contrast tool. Unlike the conventional radiographic images, all indirect digitized images were considered as having a high quality. The distance between the filling material and the root apex was 0.117 mm larger, on average, for the Digora® system (p<0.01). The measurements achieved by the investigated radiographic methods were clinically similar and they are thus equivalent. Changes in brightness and contrast of the images using Digora®software improved the diagnosis.