RESUMO
A method of preparing individualized inter-mouth protectors for patients at risk of dental trauma or inclined to suffer trauma is presented. A totally individualized protector is more efficient for the protection and prevention of dental trauma. Two sessions with the patient were required. We conclude that the method was simple, observing all the necessary requirement for this type of device.
Assuntos
Protetores Bucais , Adulto , Futebol Americano , Humanos , Masculino , Tecnologia OdontológicaRESUMO
The objective of this study was the investigation of the sealing properties of gutta-percha thermoplasticized at a low temperature by either employing or not N-Rickert cement and vertical condensation. Methylene blue at 0.5% was used to demonstrate the apical leakage. Results demonstrated that minor penetration indexes were attained when cement was not employed and vertical condensation was accomplished.
Assuntos
Cimentos Dentários , Guta-Percha , Obturação do Canal Radicular/métodos , Infiltração Dentária/prevenção & controle , Estudos de Avaliação como Assunto , HumanosRESUMO
We analyzed the possible percentage variations of dentinal penetration of the methylene blue solution in the apical third, in human teeth pulled out, after it's preparation, utilizing files type K-Flex, and five auxiliary chemical substances. Results have shown that there is a significant difference among the percentage of the dye penetration and among the auxiliary chemical substances used for the chemical-mechanic preparation. We can also prove true that, for apical region, the Endo PTC was the one that showed the greatest percentage of penetration.
Assuntos
Permeabilidade da Dentina/efeitos dos fármacos , Irrigantes do Canal Radicular/farmacologia , Permeabilidade Dentária/efeitos dos fármacos , Infiltração Dentária , Humanos , Raiz DentáriaRESUMO
Fifteen extracted human teeth were used in which after root canal treatment post preparation was made. During this preparation the middle third of the roots was perforated intencionally. These perforations were filled with three different materials: Silver amalgam, Lumicon, N-Richert Cement, associated in five groups (Lumicon; Lumicon Plus Silver Amalgam; N-Rickert Cement; N-Rickert Cement Plus Amalgam; Silver Amalgam). After this, the teeth were prepared for S.E.M. analysis. The photomicrographics were analysed by 20 observators with the purpose to the determine the filling of the material on the borders of the cavity. The best results were achieved with Lumicon Plus Silver Amalgam.
Assuntos
Coroas/efeitos adversos , Técnica para Retentor Intrarradicular/efeitos adversos , Cimentos de Resina , Materiais Restauradores do Canal Radicular , Resinas Compostas , Amálgama Dentário , Cimentos Dentários , Humanos , Microscopia EletrônicaRESUMO
The increase of dentinal permeability is a very important issue related to root canal disinfection. Beside the auxiliary substance used for the chemical/mechanical preparation, time and type of instruments were also considered. Based on these facts, we have studied the percentage of dentinal penetration of a stain (Patent blue V), in recently extracted teeth. By this way, areas of tooth hemisection and dentinal stain penetration could be assessed. Two different brands of type Kerr files (kerr and Maillefer) and a type K-Flex file were used for root canal preparation. They were used with the Endo PTC as an auxiliary chemical substance. The number of time used by each file was also considered. Results have shown no significant statistical differences of percentage of dentin stained, when different instruments were used. Less stain penetration could be observed when an increase of instrument action was placed, mainly observed in the apical area and tooth hemisection.