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1.
Rev. bras. odontol ; 69(1): 76-79, Jan.-Jun. 2012. ilus, graf
Article in Portuguese | LILACS | ID: lil-718029

ABSTRACT

A proposta deste estudo foi analisar a variação odontométrica após instrumentação rotatória em molares superiores. Foram utilizados 42 molares superiores que foram instrumentados através da técnica cérvico apical com sistema rotatório Protaper. A Odontometria visual foi realizada após o preparo dos terços cervical e médio. Após completa instrumentação apical, o limite foi reavaliado visualmente através de um cone principal. Os dados encontrados mostraram que 23% dos molares não obedeceram ao limite pré-estabelecido, no qual a maior quantidade destes foi na raiz palatina. Com isso pode-se concluir que a instrumentação rotatória pode provocar variação odontométrica apical e, no que se refere à posição morfológica dimensional do canal, esta pode influenciar no resultado final do limite instrumentado.


The aim of this study was to analyze the working length after rotary instrumentation in upper molars. Forty-two upper molars were used, which were shaped by crown down technique using Protaper rotary system. The working length was performed after cervical and medium thirds shaping, and after apical shaping, the working length was evaluated visually again by a gutta percha master cone. The results showed that 23% of the molars do not have correct working length, principally the palatal root canal. Thus, it can conclude that rotary instrumentation can result on teeth shaped incorrectly, and morphologic position of root canal can influence in the final result of working length.


Subject(s)
Dentistry
2.
Rev. paul. odontol ; 33(1): 13-16, jan.-mar. 2011. graf
Article in Portuguese | LILACS, BBO | ID: lil-600408

ABSTRACT

A proposta deste estudo foi analisar diferentes métodos de esterilização de limas endodônticas. Foram utilizadas 32 limas contaminadas por enterococcus faelis...


The aim of this study was analyze differents sterilization methods of endodontic files. It was used thirdy two files contaminated by enterococcus faecalis...


Subject(s)
Endodontics , Sterilization , Glutaral , Sodium Hypochlorite
3.
Odontol. clín.-cient ; 9(4): 365-368, out.-dez. 2010. tab
Article in Portuguese | LILACS, BBO | ID: lil-573345

ABSTRACT

O objetivo deste estudo foi comparar a capacidade antimicrobiana do soro fisiológico e do hipoclorito nas concentrações de 0.2%, 0.5%, 1%, 2.5% e 5.25%, sobre a enterococcus faecalis. Foram utilizados 34 Incisivos inferiores esterilizados com óxido de etileno e infectados com enterococcus faecalis. As amostras foram divididas aleatoriamente em 6 grupos, os quais foram irrigados com 20 ml de cada solução: grupo 1 - hipoclorito de sódio 0.2%, grupo 2 - hipoclorito de sódio 0.5%, grupo 3 - hipoclorito de sódio 1%, grupo 4 - hipoclorito de sódio 2.5%, grupo 5 - hipoclorito de sódio 5.25%, grupo 6 - soro fisiológico. O grupo controle negativo foi composto de dois dentes esterilizados e o controle positivo dois dentes infectados. Cones de papel foram introduzidos no canal radicular e depois incubados em TSB a 37ºC por 72 h. O crescimento bacteriano foi avaliado através do turvamento e scores aplicados. Maior parte das amostras apresentou crescimento moderado, todas as substâncias testadas resultaram em crescimento bacteriano, porém o hipoclorito de sódio 5.25% apresentou diferença significante. Pode-se concluir que o hipoclorito de sódio 5.25% foi o mais eficaz dos irrigantes testados.


The aim of this sudy was to compare the ability of antimicrobial of 0.9% sodium chloride and 0.2%, 0.5%, 1.0%, 2.5% to 5.25% sodium hypochlorite on the Enterococcus faecalis. It was used 34 lower incisors sterilized by ethylene oxide and infected of Enterococcus faecalis then divided randomly into 6 groups, which were irrigated with 20 ml of each solution, thus distributed: group 1 ? 0.2% sodium hypochlorite, group 2 ? 0.5% sodium hypochlorite, group 3 ? 1% sodium hypochlorite, group 4 ? 5.25% sodium hypochlorite, group 5 - five teeth irrigated sodium hypochlorite to 5.25%, Group 6 - 0.9% sodium chloride. The negative control was two sterilized teeth and positive control two infected teeth. Paper cones were on the root canal and then incubated in TSB at 37ºC during 72 hours. The bacterial growth was evaluated through turbidity and applied scores. The most part of samples showed moderate growth, all irrigants result in bacterial growth, and 5.25% sodium hypochlorite showed significant difference. It concluded that 5.25% sodium hypochlorite was the most efficient of tested irrigants.


Subject(s)
Humans , Anti-Bacterial Agents , Enterococcus faecalis , Sodium Hypochlorite
4.
J. appl. oral sci ; 18(6): 542-545, Nov.-Dec. 2010.
Article in English | LILACS | ID: lil-573721

ABSTRACT

OBJECTIVE: The aim of this study was to evaluate the in vitro action of ProTaper retreatment files and ProTaper Universal in the retreatment of mandibular premolars. MATERIAL AND METHODS: The amount of debris extruded apically was measured and the time to reach the working length and to complete the removal of gutta-percha was observed. Thirty teeth had their canals prepared using ProTaper Universal files and were obturated by the single cone technique. The teeth were then stored at 37ºC in a humid environment for 7 days. During the use of the rotary instruments for root canal filling removal, the apical portions of the teeth were attached to the open end of a resin tube to collect the apically extruded debris. RESULTS: ProTaper Universal files were significantly faster (p=0.0011) than the ProTaper retreatment files to perform gutta-percha removal, but no significant difference was found between the files regarding the time to reach the working length or the amount of apical extrusion. CONCLUSIONS: ProTaper Universal rotary had better results for endodontic retreatment, and both techniques promote similar apical extrusion of debris.


Subject(s)
Humans , Dental Instruments , Gutta-Percha , In Vitro Techniques , Root Canal Preparation/instrumentation , Nickel , Retreatment/instrumentation , Root Canal Preparation/methods , Statistics, Nonparametric , Time Factors , Titanium
5.
ROBRAC ; 19(51)2010. ilus, tab
Article in Portuguese | LILACS | ID: lil-604914

ABSTRACT

O objetivo deste estudo foi verificar a confiabilidade de um kit comercial para análise de cloro ativo, comparando-os ao processo de titulometria. O pH de 15 amostras de hipoclorito de sódio 0,5% de diferentes marcas foi medido, e assim submetidos ao processo de titulometria. Na sequência as amostras foram analisadas novamente utilizando o kit de medição de teor de cloro ativo, e os dados tabulados. Os valores encontrados foram submetidos ao teste de Mann-Whitney, com nível de significância de 5%. Os resultados apresentaram diferença significante entre os métodos (p<0,0001). Pode-se concluir que kit testado para medição de cloro ativo em soluções de hipoclorito de sódio não é eficaz para uso em Odontologia.


The aim of this study was verify the reliability of an active chlorine testing kit, comparing it to process of titration. The pH of 15 samples of sodium hypochlorite 0,5% was measured, and it done the titration process. The samples were analyzed again by active chlorine testing kit. Data were tabulated, and Mann-Whitney test was performed at 5% level of significance. The results showed significant difference between methods (p<0,0001). It can be concluded that tested kit to measurement of active chlorine in sodium hypochlorite solutions is not effective for use in dentistry.

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