Italo Medeiros Faraco Junior

Ação Antimicrobiana de Materiais Empregados na Obturação dos Canais de Dentes Decíduos por Meio da Difusão em Ágar: Estudo in vitro

Objective: To evaluate in vitro the antimicrobial action of root canal filling materials for primary teeth using the agar diffusion method. Method: The teste...

Antimicrobial activity of different root canal filling pastes used in deciduous teeth

The purpose of this study was to evaluate in vitro the antimicrobial activity of materials used as root canal filling in deciduous teeth by direct exposure test. The materials tested were: Guedes-Pinto, CTZ, zinc oxide eugenol, Calen®, L&C and MTA pastes. A microbial mixture was prepared with 1 mL each of pure suspension of the following microorganisms: Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, Bacillus subtilis, Candida albicans. For the direct exposure test, sterilized paper points were contaminated with the microbial mixture suspension and placed in contact with the respective materials for 24, 48 and 72 hours. At these intervals, paper points were removed and immersed in 7 mL of Letheen broth, followed by incubation at 37 °C/48 hours. 100 µL of inoculum obtained from Letheen broth was transferred to 7 mL of BHI under identical incubation conditions. Microbial growth was evaluated by macroscopic examination of BHI broth turbidity. In conclusion, only the CTZ and MTA pastes showed antimicrobial activity.

Differences in loosely bound fluoride formation and anticaries effect of resin-based fluoride varnishes.

OBJECTIVE.  Our in vitro study evaluated calcium fluoride formation in enamel and the anticaries effect of seven resin-based varnishes under cariogenic challenge. METHODS.  Enamel blocks were subjected to pH cycling. The experimental groups received fluoride varnish application, the positive control received topical fluoride gel treatment, and the negative control did not receive any treatment. The pH cycling surface hardness (SH1 ) and integrated loss of subsurface hardness (ΔKHN) were then determined. We measured the amount of fluoride released into the demineralizing and remineralizing (DE-RE) solutions used in pH cycling. The fluoride concentration in the enamel was determined 24 h after application of the products as loosely bound fluoride and firmly bound fluoride. RESULTS.  Higher deposits of loosely bound fluoride were observed for Duofluorid, followed by Biophat. For Duraphat, Bifluorid, Duraflur, and Duofluorid, no difference was observed in the SH1 and ΔKHN values, with the lowest mineral loss compared to the other groups. The Bifluorid and Duofluorid groups released high fluoride amounts into the DE-RE, and statistically significant difference was noted between them. CONCLUSIONS.  The anticaries effect showed no correlation with higher deposited fluoride amounts, resin type, or fluoride source.

Bibliometric analysis of scientific articles published in Brazilian and international orthodontic journals over a 10-year period

Objective This study aimed at describing the profiles of Brazilian and international studies published in orthodontic journals. Methods The sample comprised 635 articles selected from two scientific journals, i.e., Dental Press Journal of Orthodontics and American Journal of Orthodontics and Dentofacial Orthopedics, which were analyzed at three different intervals over a 10-year period (1999 - 2004 - 2009). Articles were described in terms of knowledge domain, study design, and country of origin (or state of origin for Brazilian papers). Results The most frequent study designs adopted in international studies were cohort (23.9%) and cross-sectional (21.7%) designs. Among Brazilian papers, cross-sectional studies (28.9%) and literature reviews (24.6%) showed greater frequency. The topics most often investigated were dental materials (17%) and treatment devices (12.4%) in international articles, with the latter topic being addressed by 16% of the Brazilian publications, followed by malocclusion, with 12.6%. In all cases, the most frequent countries of origin coincided with the countries of origin of each journal. Conclusions The majority of the studies analyzed featured a low level of scientific evidence. Moreover, the findings showed that journals tend to publish studies produced in their own country of origin, and that there are marked discrepancies in the number of papers published by different Brazilian states.

Utilização do sistema de anestesia computadorizada the wand® em odontopediatria

Resumen pt: Introducao: O comportamento positivo do paciente infantil depende, entre outras variaveis, do controle da dor com a anestesia local. Objetivo: Neste co...