Avaliação da densidade óptica de porcelanas usadas para confecção de próteses inlay/onlay por meio de radiografia digital

The purpose of this article was to compare the mean value of optical density of four porcelains commonly used for fabrication of inlay/onlay prostheses using direct digital radiograph. The sample consisted of 20 2-mm thick porcelain specimens (measured by digital pachymeter): Empress (Ivoclair), Simbios (Degussa), Vita Omega 900 and Vitadur Alpha (Vita Zahnfabrik). The values of optical density of the specimens were expressed in millimeters aluminum equivalent (mm eq Al). The samples were X-rayed using two charge coupled devices (CCD) - RVG (Trophy) - Visualix (Gendex) and a phosphor plate system - Digora (Soredex). The optical density reading was performed with Image Tool 1.28 in a total of 110 measurements. Statistical analysis showed that there were statistically significant differences in all materials studied (p < 0.05) regardless of the radiographic system used. The highest optical density value was found for Omega 900 (1.8988 mmeqAl - Visualix - Gendex) and the lowest for Vitadur Alpha (0.8647 - Visualix - Gendex). Thus, the material presenting the highest degree of optical density was Omega 900, Empress and Simbios presented intermediate optical density values, Vitadur Alpha presented the lowest value, and the optical density of porcelains was not influenced by the digital radiography systems.Objetivo desse trabalho é comparar valores médios de densidade óptica de quatro porcelanas comumente utilizadas para confecção de inlay/onlay por meio da densidade óptica usando radiografia digital. A amostra constou de 20 corpos de prova com espessura de 2mm (mensurados em paquímetro digital) das porcelanas: Empress (Ivoclair), Simbios (Degussa), Vita Omega 900 e Vitadur Alpha (Vita Zahnfabrik). Os valores de densidade óptica das amostras foram expressos em milímetros equivalente em alumínio (mm eq Al). Os espécimes foram radiografados, utilizando dois sistemas de dispositivo de carga acoplada (CCD) - RVG (Trophy) - Visualix (Gendex) e um sistema de placa de fósforo - Digora (Soredex). A leitura da densidade óptica foi realizada no programa Image Tool 1.28 totalizando 110 medições. As leituras de densidade ópticas foram feitas no programa Image Tool 1.28 totalizando 110 mensurações. A análise estatística demonstrou que houve diferença estatisticamente significante entre a densidade óptica das porcelanas estudadas independentemente do sistema de radiografia empregado (p < 0,05). A porcelana Omega 900 obteve 1,8988mmeqAl - Visualix - Gendex e Vitadur Alpha 0,8647mmeqAl - Visualix - Gendex. Conclui-se que a porcelana Omega 900 apresentou os maiores valores de densidade óptica, enquanto que Empress e Simbios obtiveram valores intermiediários, Vitadur Alpha apresentou os menores valores de densidade óptica e a densidade óptica das porcelanas não foram influenciadas pelo sistema de radiografia digital

Digitalização de imagens em radiologia: uma nova visão de futuro

Atualmente existem vários meios para se digitalizar uma imagem radiográfica e com o advento de computadores com maior capacidade de armazenamento o uso de imagens digitais na Odontologia está crescendo cada vez mais. Hoje em dia estamos em uma nova era com o fim da cultura papel, com arquivamento digital de imagens, onde é possível armazenar acervos inteiros de imagens em apenas um CD (compact disk). Entretanto, pouco se sabe a respeito de pixel, resolução, tipos de imagens digitais e formatos de arquivos. Em vista disto é propósito dos autores no presente trabalho, apresentar ao profissional da Odontologia a melhor resolução para digitalização de imagens, a partir de uma avaliação das imagens digitalizadas por diferentes examinadores. De acordo com as condições deste trabalho, foi possível concluir que as resoluções ideais para as radiografias periapicais e panorâmicas devem ser de 300 Dpi e para as radiografias cefalométricas em norma lateral devem ser de 75 Dpi

Assessment of anesthetic properties and pain during needleless jet injection anesthesia: a randomized clinical trial

Pain due to administration of local anesthetics is the primary reason for patients’ fear and anxiety, and various methods are used to minimize it. This study aimed to measure the degree of pain during administration of anesthesia and determine the latency time and duration of pulpal anesthesia using two anesthetic methods in the maxilla. Materials and Methods: A randomized, single-blind, split-mouth clinical trial was conducted with 41 volunteers who required class I restorations in the maxillary first molars. Local anesthesia was administered with a needleless jet injection system (experimental group) or with a carpule syringe (control) using a 30-gauge short needle. The method of anesthesia and laterality of the maxilla were randomized. A pulp electric tester measured the latency time and duration of anesthesia in the second molar. Visual analogue scale (VAS) was used to measure the degree of pain during the anesthetic method. Data were tabulated and then analyzed by a statistician. The t-test was used to analyze the differences between the groups for basal electrical stimulation. Duration of anesthesia and degree of pain were compared using the Mann-Whitney test. A 5% significance level was considered. Results: There was no statistical difference in the basal electrical stimulation threshold (mA) and degree of pain between the two methods of anesthesia (p&gt;0.05). Latency time was 2 minutes for all subjects. The duration of pulpal anesthesia showed no statistical difference (minutes) between the two methods (p&lt;0.001), with a longer duration for the traditional method of anesthesia (median of 40 minutes). Conclusions: The two anesthetics methods did not differ concerning the pain experienced during anesthesia. Latency lasted 2 minutes for all subjects; the traditional infiltration anesthesia resulted in a longer anesthetic duration compared with the needleless jet injection

Tele odontologia no Brasil: uma alternativa viável durante a pandemia de COVID-19

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Technologies on Behalf of the Dentistry Dissemination in Pandemic Times: An Interinstitutional Experience

The COVID-19 pandemic persists despite the ongoing mass immunization campaign, and there is a long journey ahead until effective control of the situation.&nbsp;In Brazil, telemedicine has grown widely. After the initial adaptation process during the first pandemic year, remote teaching and teleconsultation/ telemonitoring have consolidated such technology.&nbsp;By definition, telemedicine means the use of information technology to improve health care by approximating professionals and patients in distant locations.&nbsp;However, despite the acceptance in several health areas, dentists have rejected this new approach, claiming that telemedicine lacks the power to attract patients’ attention.&nbsp;To refute wrongly conceived theories and demonstrate the effectiveness of these resources, we described our experiences concerning dental and multidisciplinary residency education in two states (Sergipe and Paraíba) in the northeast region of Brazil, one of the most affected by the pandemic