RESUMO Objetivo: Avaliar a qualidade de diagnóstico de imagens de TCFC para detecção de lesões de cárie utilizando parâmetros de exposição diferentes. Métodos: Sessenta dentes humanos extraídos foram selecionados e digitalizados usando o sistema Kodak 9000 3D TCFC, com as seguintes combinações de parâmetros de exposição: 74 kV, 10 mA; 74 kV, 12 mA; 74 kV, 8 mA70 kV, 10 mA; 70 kV, 12 mA; 70 kV e 8 mA; 70 kV, 6,3 mA. Dois observadores avaliaram as imagens para a presença de cárie utilizando o CS 3D Imaging Software. Cada observador pontuou as superfícies proximais de cada dente em uma escala de 5 pontos. Os escores foram comparados com cortes histológicos, utilizados como padrão-ouro. A precisão para detecção de lesões de cárie foi analisada para cada combinação de parâmetros de exposição e avaliada por meio de análise da curva ROC. Resultados: Os valores médios para as áreas sob as curvas ROC para cada combinação de parâmetro de exposição variou de 0,35-0,60. Não houve diferença estatística significativa entre os protocolos 1, 2, 4, 6 e 7. No entanto, os protocolos 3 e 5 diferem de todos os protocolos. Conclusão: Embora o protocolo de dose mais elevada foi o mais eficiente para a detecção da cárie proximal, o protocolo de dose mais baixa deverá ser escolhido com base no princípio ALADA.

ABSTRACT Objective: The objective of study was to evaluate the diagnostic quality of CBCT images for caries lesions detection using different exposure parameters. Methods: Sixty extracted human teeth were selected and scanned using Kodak 9000 3D CBCT system, with the following exposure parameters combinations: 74 kV, 10mA; 74 kV, 12mA; 74 kV, 8 mA; 70 kV, 10 mA; 70kV, 12 mA; 70 kV e 8 mA; 70 kV, 6.3 mA. Two observers evaluated the images for caries presence using CS 3D Imaging Software. Each observer scored the proximal surfaces of each tooth on a 5-point scale. The scores were compared to histological sections used as gold standard. Accuracy for caries lesion detection was assessed for each exposure parameter combination and evaluated by means of ROC curve analysis. Results: The mean values for the areas under the ROC curves for each exposure parameter combination varied from 0.35 to 0.60. There was no statistical significant difference among protocols 1, 2, 4, 6 and 7. However, protocols 3 and 5 differed from all protocols. Conclusion: Although the highest dose protocol was the most efficient for proximal caries detection, the lowest dose protocol should be chosen based on the ALADA principle.

Resumo Neste estudo, nós analisamos a cortical óssea mandibular de pacientes com Diabetes Mellitus tipo 1 (DM1) e não diabéticos. Foram analisados 50 pacientes com DM1 e 100 não diabéticos, pareados por idade e sexo. Dois observadores com duplo-mascaramento avaliaram 150 imagens panorâmicas digitais de ambos os grupos. A cortical óssea mandibular foi analisada por meio do Índice Cortical Mandibular (ICM), Índice Mental (IM), Índice Goníaco (IG), Índice Antegoníaco (IA) e os Índices Panorâmicos Mandibulares Superior (IPMS) e Inferior (IPMI), com o auxílio do software RADIOIMP®. A influência do DM1 na morfologia da cortical óssea mandibular foi analisada com base na obtenção de dados relacionados ao tempo de diagnóstico do DM1, nível de glicemia, controle do DM1 e presença de complicações crônicas. Os dados coletados foram submetidos a análises descritivas (média e desvio-padrão) e inferenciais (teste de Qui-quadrado de Pearson e teste exato de Fisher) (p ≤0,05). De acordo com o ICM, indivíduos com DM1 apresentaram maiores frequências de alterações corticais mandibulares, em ambos os sexos e todas faixas etárias (p <0,01). Para os índices quantitativos, IM, IG, IA, IPMS e IPMI, pacientes do sexo feminino apresentaram diferença estatisticamente significativa para os IG e IA, enquanto os pacientes do sexo masculino mostraram diferenças estatisticamente significativas para todos os índices (p <0,05), tendo os indivíduos com DM1 medidas inferiores. Indivíduos com controle ruim do DM1 apresentaram frequência de alteração na cortical mandibular significativamente maior (92,3%), com menores médias para o IM, IG, IA e IPMI (p ≤0,05). Em conclusão, pacientes com DM1 apresentaram diminuição na cortical óssea mandibular quando comparados aos não diabéticos, indicando que o controle ruim da doença está associado a essas alterações.

Abstract In this study we analyzed the mandibular cortical bone of patients with type 1 diabetes mellitus (T1DM) and non-diabetic. Fifty patients with T1DM and 100 non-diabetic ones paired by age and gender were analyzed. Two double-blinded observers evaluated 150 digital panoramic images of both groups. The mandibular cortical bone was analyzed using the Mandibular Cortical Index (MCI), Mental Index (MI), Gonial Index (GI), Antegonial Index (AI) and Upper and Lower Panoramic Mandibular Indexes (UPMI and LPMI), with the aid of RADIOIMP® software. Influence of T1DM in the morphology of the mandibular cortical bone was studied based on obtaining data related to T1DM diagnosis time, blood glucose level, T1DM control and the presence of chronic complications. Collected data were submitted to descriptive (mean and standard deviation) and inferential analyzes (Pearson’s chi-squared test and Fisher’s exact test) (p≤0.05). According to the MCI, individuals with T1DM had higher frequencies of mandibular cortical alterations, in both sexes and all age groups (p<0.01). For quantitative indexes, MI, GI, AI, UPMI and LPMI, female patients showed statistically significant differences for GI and AI, while male patients had statistically significant differences for all indexes (p<0.05), presenting the individuals with TDM1 inferior measures. Individuals with poor T1DM control showed significantly higher frequency of mandibular cortical alteration (92.3%), with lower means for MI, GI, AI and LPMI (p≤0.05). In conclusion, patients with T1DM showed decrease in the mandibular cortical bone when compared to non-diabetic ones, indicating that poor disease control is associated with these alterations.

Abstract This study aimed at verifying the correlation among angulation of the articular eminence (AE), shape of the condyle and its degenerative bone diseases (DBDs), according to age and sex, through Cone Beam Computed Tomography (CBCT). Five hundred and twenty-eight temporomandibular joints (TMJ) were evaluated. The condyles were classified as: flat, convex, angled and rounded, and the AE angulation was measured. The DBDs evaluated were osteophytes, flattening, erosion, subcortical cysts and spinal sclerosis. There was no difference in the mean angulations in relation to age group (p>0.05). In age groups of 60-69 years (p=0.003) and 70 years or over (p=0.021), the angulation was higher in males. There was an association between DBD and sex (p=0.047), in that the prevalence was higher in females. Differences in AE angles were not observed in condyles with one or no DBDs (p>0.05). However, the presence of two or more DBDs led to a decrease in the angle (p<0.05). Angled condyles showed higher AE angulations than the flat and convex types (p<0.01). In conclusion, the AE inclination is influenced by DBD and condyle shape; an association of two or more bone diseases in the condyle, or its flat or convex anatomy, results in a decrease in the angulation.

Este trabalho tem como objetivo apresentar um caso clínico de adesão do disco da articulação temporomandibular à eminência articular, diagnosticada através da ressonância magnética. Paciente de 37 anos de idade, sexo feminino, com queixa de crises ocasionais de otalgia bilateral, ao longo dos últimos 2 anos. A paciente não referia dor ou ruídos articulares de qualquer natureza. Clinicamente, apresentava limitação de abertura de boca, com desvio à esquerda sem correção da trajetória ao final do movimento mandibular. A impressão diagnóstica foi de deslocamento anterior parcial, com redução, do disco articular direito; e, para o lado esquerdo, deslocamento anterior parcial, com redução, e adesão do disco articular ao componente temporal, com hipomobilidade do côndilo. A particularidade do caso descrito está justamente no fato de que além do deslocamento parcial anterior, bilateral, existia, também, uma adesão do disco no lado esquerdo. Conclui-se que o exame de ressonância magnética da articulação temporomandibular pode ser considerado o método de escolha para avaliação do posicionamento do disco articular e suas alterações morfológicas.

This case report has the aim to present an adhesion of the temporomadibular disc to the articular eminence, diagnosed on magnetic resonance imaging images. A 37-year-old female patient with TMJ (temporomandibular joint) disk adhesion on the left side and complaining of bilateral otalgia over the last 2 years is reported in the present article. The patient did not complain of articular pain or clicking, or any other noises of any nature. Clinical observation showed that the patient had restricted jaw opening, with mandibular deviation the left side without correction during mandibular movement. Our diagnostic impression was of partial anterior disk displacement with reduction of the right side disc; and partial anterior disk displacement with reduction and disc disk adhesion with hypo-mobility of the condyle, on the left temporomandibular joint. The peculiarity of this reported case is the fact that besides the bilateral partial anterior disc displacement, there was also found an adhesion of the disc on the left side. In conclusion, the magnetic resonance imaging exam of the temporomandibular joint can be considered an exam of choice for the evaluation of disc positioning and its morphological alterations.

AIM: To assess the dental status of elderly patients examined in the clinical dentistry course of a Brazilian public university. METHODS: An observational and descriptive study based on the analysis of panoramic radiographs. The sample consisted of 60 elderly patients who met the inclusion criteria. Two observers who had been trained in appropriate conditions performed the radiographic analysis. Data were stored in a specific form, recorded in a database and analyzed using descriptive statistics (measures of central tendency and variability) and inferential statistics (Mann-Whitney U test, Kruskal-Wallis test, Chi-square analysis and calculation of the Cramer's V coefficient). RESULTS: Most patients had at least one tooth in the oral cavity (71.7%), while 28.3% were totally edentulous, an average of 10.5 teeth per individual. The average number of teeth was 11.36 in males and 9.89 in females. The number of healthy teeth was 328 (5.47 per patient). In this study, 88.3% of the subjects had periodontal bone loss, with prevalence of moderate (35.0%) and severe (28.3%) bone loss. CONCLUSIONS: Given the high incidence of edentulous individuals, the high number of restored teeth and poor periodontal conditions, it is concluded that the overall oral health status of the evaluated elderly subjects is poor.