Remineralizing Potential of Nano-Silver-Fluoride for Tooth Enamel: An Optical Coherence Tomography Analysis

Objective: To evaluate the use of nanosilver fluoride in the enamel remineralization process through optical coherence tomography. Material and Methods: All samples were submitted to demineralization process by pH cycling during 14 days and randomly distributed into three groups (n = 11): Nanosilver Fluoride (NSF), Sodium fluoride (NaF), and negative control. Optical coherence tomography images were acquired at three different moments: initial stage (T0), post caries formation (T1), and post pH cycling (T2). The integrity of the enamel surface and the measurement of the volume loss for the tissue after pH cycling in comparison to initial images were obtained from optical coherence tomography images. Results: After analyzing the exponential decay of A-scans from each group, it was possible to identify differences in light propagation among samples. In T1 it is not possible to visualize the dentin-enamel junction, probably due to the higher back scattering of the demineralized enamel, which does not allow light to reach the dentin. The decay curves obtained from NaF and nanosilver fluoride groups showed similar behavior, while the negative group showed lower extinction coefficient. Conclusion: Nanosilver fluoride showed the best effect against caries compared to conventional fluoride treatments.

OBSERVAÇÃO DOS CRITÉRIOS PARA INDICAÇÃO DE TRATAMENTO ENDODÔNTICO EM DENTES DECÍDUOS NA PRÁTICA CLÍNICA / Note the indication criteria for endodontic treatment in primary teeth in clinical practice

Objetivo: Avaliar se os critérios radiográficos clássicos de indicação de terapia pulpar em dentes decíduos vêm sendo observados no cotidiano das atividades clínicas. Método: Foram avaliados 359 prontuários de pacientes atendidos na clínica de odontopediatria da Faculdade de Odontologia de Pernambuco (FOP/UPE), no período de janeiro de 2011 a junho de 2013. Dentre os 359 prontuários avaliados, 64 registraram tratamento pulpar em 78 dentes decíduos, os quais compõem a amostra final deste estudo. Mediante as radiografias intraorais, contidas nos prontuários, foram observados o grau de destruição coronária, o estágio de desenvolvimento de Nolla da raiz do sucessor permanente e o grau de rizólise do dente decíduo. Resultados: observou-se que a idade média das crianças incluídas no estudo foi de 6,62 anos (± 1,98). Em 11,5% dos casos, o critério que previa condições para que o dente decíduo pudesse ser restaurado não foi seguido, e em 32% dos casos não foram levados em consideração o grau de rizólise do dente decíduo ou o estágio de Nolla. Conclusão: Os critérios radiográficos clássicos de indicação para terapia pulpar em dentes decíduos não estão sendo rigorosamente observados na clínica odontopediátrica da instituição de ensino avaliada, indicando o risco de iatrogenias serem reproduzidas pelos futuros profissionais.

Aim: To assess whether the radiographic classic criteria of pulp therapy indication in deciduous teeth have been observed in daily clinical activities. Methods: A total of 359 records of patients attended in pediatric dentistry clinic of the Faculty of Dentistry of Pernambuco (FOP / UPE), from January 2011 to June 2013. Of the 359 records evaluated 64 registered pulp treatments in 78 primary teeth, which make up the final sample. Through intra-oral radiographs, contained in the medical records, the degree of coronary destruction, the Nolla stage of development of the permanent successor root and the degree of tooth root resorption deciduous were observed. Results: It was observed that the average age of the children included in the study was 6.62 years (± 1.98). In 11.5% of cases, the criterion which provided conditions for the deciduous tooth could be restored was not followed, and in 32% of cases were not taken into account the degree of tooth root resorption deciduous or Nolla stage. Conclusion: The classic radiographic criteria indication for pulp therapy in primary teeth, are not being strictly observed in Pediatric Dentistry of assessed educational institution, indicating the risk of iatrogenic be reproduced by future professionals.