The aim of this study was to determine the radiodensity of base, liner and luting dental materials and to compare them with human enamel and dentin. Four classes of materials were examined: conventional glass ionomers (CG)-Vitro Cem, Ketac Bond, Vidrion F, Vidrion C; resin-modified glass ionomers (RMGI)-Fuji II LC, Vitrebond; resinous cement (RC)-Rely-X ARC; and zinc phosphate cement (ZP)-Cimento LS. Five 2-mm-thick standard samples of each material and five 2-mm-thick enamel and dentin samples were produced. An aluminum step wedge served as control. Samples were positioned over a phosphor plate of Digora digital system, exposed to X-ray, and the radiodensity obtained in the software Digora for Windows 2.0. Data were submitted to Kruskal-Wallis and Dunnett multiple comparisons test (alpha=0.05). According to statistical analysis, the following sequence in degree of radiodensity could be seen among the groups: Cimento LS (ZP) > Vitro Cem (CG) = Fuji II LC (RMGI) = Rely-X ARC (RC) = Vitrebond (RMGI) > Ketac Bond (CG) > enamel = Vidrion F (CG) > Vidrion C (CG) = dentin. The presence of radiopaque fillers such as zinc, strontium, zirconium, barium, and lanthanium rather than material type seems to be the most important factor when analyzing material radiodensity. Almost all investigated materials presented an accepted radiodensity.

ruxism is a pathological activity of the stomatognathic system that involves tooth grinding and clenching during parafunctional jaw movements. Clinical signs of bruxism are mostly related to dental wear and muscular and joint discomforts, but a large number of etiological factors can be listed, as local, systemic, psychological and hereditary factors. The association between bruxism, feeding and smoking habits and digestive disorders may lead to serious consequences to dental and related structures, involving dental alterations (wear, fractures and cracks), periodontal signs (gingival recession and tooth mobility) and muscle-joint sensivity, demanding a multidisciplinary treatment plan. This paper presents a case report in which bruxism associated with acid feeding, smoking habit and episodes of gastric reflow caused severe tooth wear and great muscular discomfort with daily headache episodes. From the diagnosis, a multidisciplinary treatment plan was established. The initial treatment approach consisted of medical follow up with counseling on diet and smoking habits and management of the gastric disorders. This was followed by the installation of an interocclusal acrylic device in centric relation of occlusion (CRO) for reestablishment of the occlusal stability, vertical dimension of occlusion, anterior guides and return to normal muscle activity (90-day use approximately). After remission of initial symptoms, oral rehabilitation was implemented in CRO by means of full resin composite restorations and new interocclusal device for protection of restorations. Satisfactory esthetics, improved function and occlusal stability were obtained after oral rehabilitation. The patient has attended annual follow-ups for the past 2 years. The multidisciplinary treatment seems to be the key for a successful rehabilitation of severe cases of dental wear involving the association of different health disorders.

ObjectiveTo determine the influence of P/L ratio on the radiodensity and diametral tensile strength (DTS) of glass ionomer cements. Material and MethodsThere were 2 factors under study: P/L ratio (manufacturer's recommended P/L ratio and a 50% reduced P/L ratio), and materials (Vitro Molar, Vitro Fil, Vitro Cem conventional GICs and Vitro Fil LC, Ortho Glass LC RMGICs). Five 1-mm-thick samples of each material-P/L ratio were produced for radiodensity evaluation. Samples were x-ray exposed onto Digora phosphor plate and radiodensity was obtained using the software Digora for Windows 2.5 Rev 0. For DTS, five (4.0x8.0 mm) cylinder samples of each material were tested (0.5 mm/min). Data were subjected to one- and two-way ANOVA (5x2) followed by Tukey's HSD test, or Kruskal-Wallis and Dunn's method. For paired comparisons, t-test or Mann-Whitney test were used (a=0.05).ResultsThere was a significant interaction (P=0.001) for the studied factors (materials vs. P/L ratio). Reduced P/L ratio resulted in significantly lower DTS for the RMGICs, but radiodensity was affected for all materials (P<0.05). ConclusionsReduced P/L ratio affected properties of the tested glass ionomer cements. RMGICs were more susceptible to lower values of DTS, but radiodensity decreased for all materials following P/L ratio reduction.

For TMDs with joint components, the best acupuncture treatment involves local points and for the TMDs with muscle components, points at a distance.

In the most recent decades, several developments have been made on impression materials' composition, but there are very few radiodensity studies in the literature. It is expected that an acceptable degree of radiodensity would enable the detection of small fragments left inside gingival sulcus or root canals.ObjectiveThe aim of this study was to determine the radiodensity of different impression materials, and to compare them to human and bovine enamel and dentinMaterial and MethodsTwenty-five impression materials, from 5 classes, were studied: addition and condensation silicones, polyether, polysulfides and alginates. Five 1-mm-thick samples of each material and tooth structure were produced. Each sample was evaluated 3 times (N=15), being exposed to x-ray over a phosphor plate of Digora digital system, and radiodensity was obtained by the software Digora for Windows 2.5 Rev 0. An aluminum stepwedge served as a control. Data were subjected to Kruskal- Wallis and Dunn's method (α=0.05).ResultsDifferent materials and respective classes had a different behavior with respect to radiodensity. Polysulfides showed high values of radiodensity, comparable to human enamel (p>0.05), but not to bovine enamel (p<0.05). Human dentin was similar only to a heavybody addition silicon material, but bovine dentin was similar to several materials. Generally, heavybody materials showed higher radiodensity than light-body ones (p<0.05).ConclusionImpression materials' radiodensity are influenced by composition, and almost all of them would present a difficult detection against enamel or dentin background in radiographic examinations.

Entrevista com Maria Lygia Quartim de Moraes.

A Deus, que me mantém sempre tão protegida, e cuida da minha vida com tanto Amor! Perceber Sua presença diariamente no meu caminho e nas minhas escolhas é maravilhoso! Agradeço por mais essa conquista, e peço que me conserve atenta, para que eu sempre encontre maneiras de usar tudo o que me é concedido a serviço do Bem! Ao Rodrigo, meu amigo, companheiro e Amor! Sem sombra de dúvidas, eu não teria chegado até aqui sem você! Obrigada pela confiança em mim, mesmo nos meus momentos de maior fraqueza; por seu desprendimento em ver um sonho meu se realizando, mesmo às custas de alguns planos nossos; por seu estímulo e entusiasmo, seu apoio e incentivo, e principalmente, pelo seu amor, que eu posso ver e sentir sem nenhum esforço! Construir a vida como temos feito, com companheirismo e amizade, me enche de orgulho! Não há um único dia em que eu não agradeça a Deus por tê-lo colocado em meu caminho! Obrigada por fazer minha vida tão feliz e completa! Meu doutorado é dedicado a você, meu Amor! Muito obrigada! Aos meus pais, Sofia e Joel, por tudo o que representam na minha vida! Vocês são meus maiores exemplos de retidão, caráter e Amor! Meu porto seguro de todos os momentos! Depois de deixarmos a casa dos pais, é que descobrimos quem realmente somos, e eu vejo, hoje, como tenho tanto de cada um de vocês! E me sinto muito feliz e orgulhosa por isso! Não poderia ter escolhido outras pessoas para me apresentarem a Vida! Meu Amor é incondicional, e cada conquista em minha vida sempre será dedicada a vocês! Muito obrigada! Às minhas irmãs, Aline e Lígia, e à pequena Isabela, que chegará em breve. Agradeço a Deus todos os dias por tê-las colocado em meu caminho! Não há uma conquista sequer em minha vida que eu não queira compartilhar com vocês! O sentimento verdadeiro de amor e amizade entre nós é um tesouro de valor imensurável! Fico feliz por serem vocês as pessoas que estarão comigo por toda a vida! Estaremos sempre lado a lado, onde quer que estejamos! Obrigada por me apoiarem sempre! Amo vocês! Agradecimentos EspeciaisAos pacientes que participaram dessa pesquisa, agradeço pela participação voluntária, Ao Giordano, meu amigo, parte da minha família. Gigio, sou muito grata a Deus por ter te colocado em nossa família! Você é um irmão e grande companheiro, sempre ao nosso lado, nos melhores momentos e também nos mais difíceis! Que Deus nos permita, ao longo dos anos, construirmos, todos juntos, a família que sempre desejamos! À Renata Filgueira, minha amiga querida! Rê, não me canso de falar o quão importante você foi nessa fase da minha vida! Tê-la por perto tornou tudo muito mais fácil e leve! Sua amizade foi um grande presente, e quero tê-la por perto sempre! Te desejo muito, muito bem, amiga, e fico realmente feliz com suas conquistas e seu sucesso! Obrigada por tudo! À Giovana Venezian, parceira do início ao fim do doutorado! Gi, você é extremamente dedicada e rigorosa em tudo o que faz, e emprestou esse olhar pra todas nós no desenvolvimento de nossos trabalhos! Aprendi tanto com você! Tenho muito a te agradecer por ...

No abstract