Performance of alternative DenOptix PSPs erasing times on subjective digital image quality

Orientador: Guilherme Monteiro TosoniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: O objetivo, neste trabalho, foi verificar se tempos alternativos de dessensibilização das placas de fósforo do sistema DenOptix causam interferência na qualidade da imagem radiográfica e no diagnóstico de cáries proximais. Foram obtidas imagens de 10 phantoms, constituídos de dentes humanos, utilizando-se placas de fósforo parcialmente dessenbilizadas. Os dez tempos de dessensibilização estudados foram em ordem decrescente: 130s, 98s, 66s, 34s, 25s, 20s, 15s, 10s, 5s e 0s. As imagens foram posteriormente avaliadas, quanto à sua qualidade subjetiva, por dois examinadores. Cada avaliador atribuiu escores para contraste, densidade e nitidez da imagem; para definição das estruturas - esmalte, dentina e junção amelo-dentinária; e para a presença ou ausência de imagem dupla. Os resultados foram submetidos à correlação de Spearman, análise de variância e teste de Tukey. Os tempos de 20s a 130s apresentaram qualidade satisfatória em todos os quesitos abordados. Após esta primeira avaliação, os seis tempos considerados estatisticamente eficazes nos quesitos referentes à qualidade geral da imagem foram submetidos a uma nova avaliação, quanto à presença de cárie proximal. As imagens correspondentes aos tempos selecionados foram interpretadas por cinco avaliadores. Cada avaliador atribuiu um escore para cada uma das faces dentárias interpretadas. Esses escores foram posteriormente comparados ao padrão ouro. Os tempos de dessensibilização alternativos foram avaliados, quanto à sua acurácia no diagnóstico de cárie, por meio da curva ROC. As médias das curvas ROC correspondentes aos tempos de dessensibilização avaliados variaram de 0,61 a 0,66 e não apresentaram diferença estatística significativa entre elas. O desempenho dos tempos de dessensibilização alternativos de 20s a 130s foi satisfatório tanto nos quesitos de qualidade geral da imagem como no diagnóstico de cáries proximais, demonstrando a possibilidade da utilização de tempos alternativos de dessensibilização das placas do sistema DenOptix na redução do tempo de trabalho na clínica diáriaAbstract: The aim on this study was to verify if DenOptix¿s phosphor plates alternative erasing times would cause any influence on the image quality and on the diagnosis of approximal caries. Ten human teeth phantoms were radiographed using phosphor plates, partially erased. The chosen erasing times were: 130s, 98s, 66s, 34s, 25s, 20s, 15s, 10s, 5s e 0s. Two observers, independently, evaluated the general quality of each image, scoring the images on contrast, density, sharpness and structures definition (enamel, dentine and enamel-dentine junction). The presence of double image was also evaluated. The resultant data was evaluated using the Spearmen¿s correlation, variance analysis, and Tukey¿s test. The erasing times from 20s to 130s had a satisfactory quality in all the evaluated items. After the first evaluation, the erasing times that showed statistical efficiency in the evaluated quality items of the image went through another evaluation regarding the presence of approximal caries. The images of the selected erasing times were evaluated by five observers. Each observer scored the approximal surfaces of each tooth. The scores were compared to the golden standard. The alternative erasing times were evaluated by their accuracy on predicting caries by means of the ROC curve analysis. The means of the ROC curves of each erasing time evaluated varied from 0,61 to 0,66 and did not show significant statistical difference between them. The alternative erasing times from 20s to 130s was satisfactory both on the quality analysis as on approximal caries diagnosis, what makes the use of those alternative erasing times of DenOptix¿s phosphor plates feasible during clinical practiceMestradoRadiologia OdontologicaMestre em Radiologia Odontológic

Oral health related quality of life and determinant factors in patients with head and neck cancer

The present study aimed to measure the impact of oral health on the quality of life of patients with head and neck cancer. A cross-sectional study was conducted with 130 patients diagnosed with head and neck cancer at two medical centers. Participants answered a sociodemographic questionnaire and the Oral Health Impact Profile - 14 (OHIP-14). Clinical aspects, cancer staging, and treatment approach were also investigated. Mann-Whitney and Kruskal-Wallis non-parametric tests were used for statistical analysis, followed by Poisson regression analysis (with robust error variance), to associate the OHIP-14 scores with independent variables. The OHIP-14 presented good internal consistency (Cronbach?s Alpha = 0.861). The mean score obtained was 19.52 (±11.79). Physical pain (3.70±2.44), physical disability (3.26±2.62) and functional limitation (3.24±2.45) were ranked as the main factors affecting the quality of life. Patients non-Caucasians (PR = 1.30; IC 95% = 1.07-1.58; p = 0.009), widowers (PR = 1.36; IC 95% = 1.13-1.64; p = 0.001), diagnosed with squamous cell carcinoma (PR = 1.28; IC 95% = 1.05-1.58; p = 0.017) and with temporomandibular pain (PR = 1.31; IC 95% = 1.08-1.60; p = 0.007) were more likely to exhibit lower rates of quality of life. The results showed a high impact of the oral health in the quality of life of patients with head and neck cancer was observed. Sociodemographic and clinical characteristics can exert influence on the quality of life of patients with head and neck cancer

Mandibular incisive canal-related prevalence, morphometric parameters, and implant placement implications : a multicenter study of 847 CBCT scans

This study evaluated the epidemiological and morphological features of the mandibular incisive canal (MIC) using cone beam computed tomography (CBCT) in a significant sample of subjects in Brazil. This retrospective, multicenter study assessed 847 CBCT scans performed at four oral imaging centers. The sample comprised CBCT images acquired from dentate individuals who presented at least from tooth 35 to tooth 45 in the anterior mandible region. Data regarding patient sex and age, and MIC linear measurements (length and diameter in mm), anatomical distances (to the alveolar, buccal and lingual cortexes, inferior border of the mandible, and adjacent teeth apexes), and location were obtained. The MIC was more prevalent in women (76.3% [p<0.001]) between the fourth and sixth decades of life (p<0.001). It was present bilaterally (p<0.001) and exhibited a mean length of 7.7 mm (standard deviation [SD]=3.7 mm). Spearman correlation and logistic regression analysis revealed collinearity between age and linear measurements (p<0.05). The mean distances varied from the initial to the final portion of the MIC, respectively, in relation to the buccal cortex (mean=2.6 mm, SD=1.27; mean=3.96 mm; SD=1.43), to lingual cortex (mean=5.13 mm; SD=1.7; mean=4.61 mm, SD = 1.65), and to the inferior mandibular border (mean = 9.32 mm, SD=1.92; mean=8.76 mm, SD=2.07 mm). The difference in the proximity of the MIC to the apex of the inferior lateral incisor was statistically significant (p<0.05). Results of this study revealed a high prevalence of MIC with a bilateral pattern in women who were between the fourth and sixth decades of life. Both the distance between the MIC and the lingual cortex of the mandibular alveolar bone, and the diameter of the MIC, decreased as its trajectory assumed a more anterior position

Stafne's Defect with Buccal Cortical Expansion: A Case Report

A rare case of Stafne's bone cavity, type III-G, is reported in a 49-year-old male patient who had been referred to a private clinic for a routine evaluation. The final diagnosis was based on computed tomography. Scintigraphy played a fundamental role in determining the most likely etiology

Relationship between articular eminence inclination and alterations of the mandibular condyle: a CBCT study

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

ADHESIÓN DEL DISCO DE LA ATM - REPORTE DE UN CASO

Presentamos un caso de adhesi&oacute;n unilateral del disco de la articulaci&oacute;n temporo-mandibular en un paciente de 51 a&ntilde;os, sexo femenino, con queja de otalgia bilateral ocasional, de intensidad moderada, a lo largo de los &uacute;ltimos 10 a&ntilde;os. La paciente no refiri&oacute; dolor o ruidos articulares de ninguna naturaleza. Cl&iacute;nicamente, presentaba limitaci&oacute;n de apertura bucal, con desv&iacute;o hacia la izquierda sin correcci&oacute;n de la trayectoria al final del movimiento mandibular. La impresi&oacute;n diagn&oacute;stica cl&iacute;nica e imagenol&oacute;gica fue de desplazamiento anterior parcial con reducci&oacute;n del disco articular derecho; y aparente desplazamiento anterior parcial, adhesi&oacute;n del disco articular ("anchored disc phenomenon" - ADP) e hipomovilidad del c&oacute;ndilo izquierdo.ABSTRACTTMJ disk adhesion - case report It is reported on a case of a 51-year-old female patient presenting TMJ (temporomandibular joint) disk adhesion on the left side and complaining of otalgia over the last 10 years. The patient did not complain of articular pain or clicking. Clinically, the patient presented jaw opening limitation, with deflection of the mandible to the left side without correction of the trajectory at the end of the jaw opening movement. Our diagnostic impression was partial anterior disk displacement with reduction, for the right side; and elusive partial anterior disk displacement, disk adhesion ("anchored disc phenomenon" - ADP), and hipomobility of the condyle, for the left side