The purpose of this study was to evaluate, in vitro, the properties (wear and roughness) of glass ionomer cements that could influence their indication as pit and fissure sealants. The utilized materials were Fuji Plus, Ketac-Molar and Vitremer (in two different proportions: 1:1 and :1). The resin-based sealant Delton was used as control. By means of an electronic balance (precision of 10-4 g), wear was measured in function of weight loss after simulated toothbrushing. Superficial roughness was determined by means of a surface roughness-measuring apparatus. The results revealed that diluted Vitremer and Fuji Plus were less resistant to toothbrushing abrasion and had the greatest increase in superficial roughness. Although in clinical situations luting or diluted ionomer cements are often utilized as alternatives to resin-based sealants, the resultsof this study revealed that the properties of those cements are worse than those of restorative ionomers, whichpresented results similar to those of the evaluated resin sealant.

This study aimed to use new three-dimensional (3D) anthropometric analyses to verify the post-surgical effects on the maxillary segments of children with unilateral cleft lip and palate. The sample was composed by digitized dental models of 60 children with unilateral complete cleft lip and alveolus (UCLA) and complete unilateral cleft lip and palate (UCLP). The impressions were taken before cheiloplasty (T1), after cheiloplasty (T2), and after palatoplasty (T3). The 3D anthropometric analyses of digitized dental casts were obtained through a specific software. Intragroup changes were applied paired t test and Wilcoxon test (UCLA group) and for the UCLP group, repeated-measures analyses of variance followed by the Tukey test. For intergroup analyses, an independent t test and Mann-Whitney test were used. The palatal dimensional changes of UCLA group showed that the distances IC, I-T', and I-T significantly increased after cheiloplasty (p = 0.0002, p = 0.0007 and p < 0.0001, respectively). In the UCLP group, the IC' distance statistically decreased in the post-surgical periods (p < 0.0001), while the I-T distance increased (p < 0.0001). The IC distance increased after cheiloplasty (p < 0.0001). The I-T' distance increased between T2 and T3 with statistically significant differences (p = 0.0037). The intergroup analysis of palatal development (T2-T1) showed that the distances IC' and I-T' demonstrated a reduction of the dental arches growth of UCLP group compared with the UCLA group, with statistically significant differences. The new 3D anthropometric analysis showed that the development of the maxillary segments changed after surgical repair. The UCLP group demonstrated a reduction of the dental arches growth compared with the UCLA group.

ObjectivesThis in vitro study evaluated the capability of different soft drinks (Coca-Cola®-C, Coca-Cola Light®-CL, Guaraná®-G, Pepsi Twist®-P and Sprite Light®-SL) to erode dental enamel, relating the percentage of superficial microhardness change (%SMHC) to concentrations of fluoride and phosphate, buffering capacity and pH of these drinks.MethodsThe soft drinks were evaluated in respect to concentration of phosphate and fluoride spectrophotometrically using Fiske, Subarrow method and by specific electrode (Orion 9609), respectively. The pH and the buffering capacity were determined by glass electrode and by estimating of the volume of NaOH necessary to change the pH of the drink in one unit, respectively. One hundred specimens of bovine enamel were randomly assigned to 5 groups of 20 each. They were exposed to 4 cycles of demineralisation in the beverage and remineralisation in artificial saliva. The softening of enamel was evaluated by %SMHC.ResultsThe mean %SMHC was: C=77.27%, CL= 72.45%, SL=78.43%, G=66.65% and P=67.95%. Comparing the %SMHC promoted by 5 soft drinks, SL = C > CL > P = G (P<.05). There was not significant correlation between %SMHC and the other variables tested for the five drinks (P>.05).ConclusionsThe five soft drinks caused surface softening of enamel (erosion). In respect to the chemical variables tested, despite not statistically significant, the pH seems to have more influence on the erosive potential of these drinks. (Eur J Dent 2007;1:10–13)

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A epilepsia e seu tratamento podem apresentar questões específicas para os pacientes que recebem atendimento odontológico. A segurança de anestésicos locais, o cuidado com a luz do refletor, as interações medicamentosas, o crescimento gengival, os traumatismos durante as convulsões, o tipo de prótese mais indicada, os fármacos para intervir em situação de emergência, são alguns pontos que o cirurgião-dentista deve conhecer. Esta revisão de literatura é uma proposta de oferecer orientação para o tratamento odontológico em pacientes epiléticos. A abordagem segue desde a importância da anamnese até os efeitos dos fármacos presentes na rotina do cirurgião-dentista. DESCRITORES: Assistência Odontológica para Doentes Crônicos • Tratamento de Emergência • Epilepsia. ABSTRACTEpilepsy and its treatment may present specific issues for patients who receive dental care. The safety of local anesthetics, care for the spotlight, drug interactions, growth gingival trauma during seizures, the most appropriate type of prosthesis, drugs to intervene in emergencies, are some points that the surgeon dentist should know. This literature review is a proposal to provide guidance for dental treatment in patients with epilepsy. The approach follows from the importance of history until the effects of these drugs in dentist's routine.

ResumoO treinamento de procedimentos médicos invasivos na etapa pré-clínica é um grande desafio educacional. A abordagem tradicional, com animais e cadáveres, apresenta problemas éticos e práticos. Uma solução promissora é a utilização de realidade virtual (RV), que permite simulações realistas de baixo custo, repetibilidade e feedback em tempo real. Tal constatação motivou o desenvolvimento do ambiente VIDA Odonto, o qual utiliza tecnologias avançadas de RV, modelagem realista do paciente e interação imersiva tridimensional. O protótipo desenvolvido, do módulo do ambiente virtual desse sistema, foi testado e avaliado por profissionais com experiência na prática clínica e principiantes, demonstrando a viabilidade de se tornar um recurso educacional relevante em cursos de odontologia. Palavras-chave: realidade virtual, odontologia, treinamento, imersão, interação 3D. AbstractTraining invasive medical procedures at the pre-clinical development is a considerable educational challenge. The traditional approach, with animals and corpses, presents both ethical and practical issues. So, the use of virtual reality (VR), which enables low-cost realistic simulations, repeatability and real time feedback, is a promising solution. Such ascertainment motivated the development of the virtual environment VIDA Odonto, which resorts to VR technologies, realistic modeling of patient and tridimensional immersive interaction. The developed prototype of the virtual environment of such system was tested and evaluated by professionals with clinical experience and beginners, demonstrating its viability to be a relevant educational resource in dentistry courses.

Comparou-se a infiltração marginal de dois cimentos restauradores que liberam flúor, o Vitremer/3M e o Variglass/Caulk Dentsply. Cavidades classe II foram confeccionadas nas faces mesiais e distais de pré-molares extraídos. Cada dente recebeu uma restauração de cada material. Procedeu-se, então, a termociclagem em solução de fucsina básica a 0,5%. Nenhum material foi capaz de evitar a infiltração marginal, porém, esta foi menor nas restaurações de Vitremer/3M (p<0,01).

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