Accuracy of cone-beam CT in detecting vertical root fractures in teeth with post-endodontic restorations: an in vitro study

The aim of this study was to evaluate the accuracy of cone-beam CT (CBCT) for the detection of artificially created vertical root fractures (VRF) in extracted teeth restored with metallic (MP) and fiberglass (FGP) posts. After root canal obturation, 60 extracted human premolars were scanned by using the highest-resolution settings of a CBCT unit. Theprepared roots were randomly divided into three groups: group C (control group): non-restored and non-endodontically treated teeth (n = 20); group MP (n = 20); group FGP (n = 20). In all groups, 10 teeth were artificially fractured. Two external and independent observers blindly recorded the presence or absence of VRF. Sensitivity, specificity, accuracy, intra-and interobserver agreement were calculated. Kappa value for inter-and intraobserver agreement was 0.82 and 0.84 respectively, demonstrating goodagreement. The highest values for sensitivity (0.80 -0.90), specificity (1.00) and accuracy (0.90 -0.95) were found in the control group. The teeth with FGP restoration presented the lowest sensitivity (0.30 -0.50) and accuracy (0.60 -0.65) values. Both examiners had a good performance in the diagnosis of fractures in teeth with MP, with accuracy ranging between 0.85 -0.90. The presence of MP did not influence accuracy; however, the presence of FGP reduced the diagnostic capacity of CBCT.

Manifestações bucais e considerações gerais da síndrome de Behçet: relato de caso / Oral manifestations and general considerations of Behçet's Syndrome: case report

Objetivo: relatar um caso de síndrome de Behçet, enfatizando o controle das manifestações bucais. Relato de caso: paciente de 21 anos de idade, já diagnosticado com síndrome de Behçet há 7 anos, sem histórico familiar, relatou o aparecimento de úlceras recorrentes, quando iniciou tratamento ortodôntico. Procurou a clínica odontológica da Universidade Estadual de Maringá queixando-se de "aftas e carne crescida" na boca. Foi realizada biópsia excisional do nódulo, e o exame histopatológico revelou tecido hiperplásico com infiltrado inflamatório crônico decorrente. Após 45 dias, observaram-se presença de novas aftas em mucosa labial, língua e gengiva assim como total cicatrização na região da biópsia. Atualmente, o paciente permanece em controle clínico médico e odontológico, estando as lesões aftosas presentes em diferentes regiões. Considerações finais: apesar de rara, essa doença é de grande relevância para o cirurgião-dentista, que deve saber diagnosticá-la e controlar suas manifestações bucais. Além disso, o acompanhamento é necessário para melhorar a qualidade de vida do paciente. (AU)

Objective: report a case of Behçet's Syndrome, emphasizing the control of oral manifestations. Case report: a 21-year-old patient, diagnosed with Behçet's Syndrome for 7 years, with no family history, reporting recurrent ulcers when orthodontic treatment was started. He sought a dental clinic at the State University of Maringá complaining of "aphthae and grown flesh" in the mouth. Excisional nodule biopsy and histopathological examination of hyperplastic tissue with chronic inflammatory infiltrate were performed. After 45 days, the presence of new aphthae were observed in the labial mucosa, tongue and gingiva, as well as total scarring in the region of the biopsy. Currently, the patient remains in clinical and dental control, remaining as aphthous interventions present in different regions. Final considerations: although rare, this disorder is of great relevance for the dental practioner, who must know how to diagnose and control its oral manifestations. In addition, follow-up is necessary to improve the patient's quality of life. (AU)