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1.
Journal of Chinese Physician ; (12): 633-635, 2013.
Article in Chinese | WPRIM | ID: wpr-436122

ABSTRACT

Objective To evaluate the clinical effect of the use of pathfile and protaper nickel-titanium instruments for machine in root canal preparation.Methods A total of 200 patients suffering from pulpitis and periapical that needs root canal treatment was randomly divided into two groups according to treatment order (100 patients/each group).The experimental group was used pathfile and protaper in root canal preparation,and filled with warm gutta vertical condensation.The control group was used protaper root canal preparatory standards method,and filled with warm gutta vertical condensation.The required time of two sets of root canal preparation and the number of equipment broken were recorded,and X-ray film at the preoperation intraoperation and postoperation were used to evaluate effect of preparation and root filling.Results In the root canals prepared of the two groups,no issued offset,no side wear,no step-forming,and no position changed of the apical foramen were occurred,which was consistent with preperative X-ray film.One case was occurred fracture of instrument in the experimental group and the control group,it was Slfile.Tooth position was right mandibular,second molar nearly the root apical 1/3,and upper left second molar mesial buccal root apical position.The root canal preparation time of experimental group was significantly shorter than the control group[the front teeth:(4.73 ± 1.12) min vs (6.32 ± 1.84) min,t =2.243,P <0.05; the premolars:(7.83±1.23)min vs (10.25±2.68)min,t =2.475,P <0.05; the molars (10.14 ± 1.18) min vs (15.43 ± 5.94) min,t =2.991,P < 0.01].Postoperative X-ray showed that 2 cases were occurred small amount of paste overfilled,the root canal closed tight,no less filling; and 3 cases of the control group occurred paste overfilled,no less filling too.Conclusions The use of nickel-titanium instruments pathfile and protaper for machine in root canal preparation is feasible,and improves the efficiency of root canal preparation.

2.
J. Health Sci. Inst ; 28(2)abr.-jun. 2010. ilus
Article in Portuguese | LILACS | ID: lil-644807

ABSTRACT

Objetivo - O objetivo deste estudo foi avaliar a influência do número de utilizações dos sistemas rotatórios ProTaper®, Hero Shaper® e dos instrumentos manuais Flexofile® no preparo de canais radiculares achatados. Método - Foram utilizados 47 incisivos inferiores humanos. Estes dentes foram divididos em três grupos. GI: ProTaper, G2: Hero Shaper e G3: Flexofile, sendo que cada grupo foi dividido novamente em mais 3 sub-grupos, para o primeiro, terceiro e quinto uso. Após o preparo, os dentes foram submetidos ao processamento histológico. A análise foi feita em relação ao perímetro regular das paredes dentinárias e à quantidade de resíduos na luz do canal radicular. A análise das imagens foi feita por meio do software UTHSCSA Image Tool, e os resultados foram submetidos ao teste estatístico ANOVA. Resultados - Em relação ao perímetro regular e à presença de resíduos, houve diferença estatística significativa entre os usos e entre os grupos. Conclusão - Conclui-se que, em relação à limpeza, os instrumentos no primeiro uso foram considerados com a mesma eficiência entre si; durante o terceiro uso, o ProTaper demonstrou superioridade em relação aos demais, enquanto que no quinto uso, o Hero Shaper foi considerado o melhor instrumento. Em relação à quantidade de perímetro regular, concluiu-se que o ProTaper foi superior aos demais no primeiro uso, enquanto que nas demais utilizações os instrumentos foram considerados iguais.


Objective - This study evaluated the influence of the number of use when ProTaper®, Hero Shaper® and hand files Flexofile are used in flattened root canals preparation. Method - It was used 45 human mandibular incisors and the exclusion factor was the presence of more than one root canal. These samples were divided into three study groups. GI: ProTaper, G2: Hero Shaper and G3: Flexofile. The preparation was made and the samples was subjected to histological analysis which evaluated the perimeter of regular dentin walls and the amount of debris in the root canal. Image analysis was performed using UTHSCSA Image Tool. Results - The ANOVA test showed significant differences between the numbers of use and between the different rotary systems. Conclusion - Regarding the cleaning efficiency it was concluded that at first use all of the instruments showed the same efficiency; at the third use the ProTaper demonstrated superiority compared to the other, while at the fifth use Hero Shaper showed the best performance. Regarding the regular perimeter, ProTaper was better than the other systems at the first use, while at the other uses the instruments were considered equal.

3.
Araraquara; s.n; 2008. 166 p. ilus.
Thesis in Portuguese | LILACS, BBO | ID: lil-590711

ABSTRACT

A evolução da endodontia ocorre continuamente de modo que sistemas, técnicas e instrumentos endodônticos têm sido criados e estudados por diversos autores por meio de diferentes métodos analisando seu desempenho. O presente estudo teve como objetivo avaliar aspectos relacionados ao preparo do canal radicular assim como também analisar os métodos de estudo empregados para este fim. Foram empregadas 10 raízes mésio-vestibulares de molares superiores humanos extraídos, as quais foram incluídas em blocos de resina e seccionadas transversalmente nos terços médio e apical. Para a instrumentação foi empregado o sistema Race. A análise do preparo foi feita por meio da Plataforma Radiográfica, do Método de Bramante e do Método Histológico. Foi observado que, diante de uma padronização dos métodos de estudo empregados, é possível obter resultados coerentes entre cada um, mesmo quando se avalia aspectos diferentes do preparo do canal radicular. Pesquisas que avaliam o mesmo aspecto do preparo podem apresentar resultados diferentes e estas diferenças podem estar associadas a variáveis inerentes a cada sistema de avaliação empregado. Em relação ao método de estudo concluiu-se que todos forneceram informações importantes para a análise do preparo do canal radicular, no entanto, não devem ser considerados individualmente. De acordo com o aspecto avaliado, um método pode complementar o outro e, desta forma, atingir resultados fidedignos. Em relação aos aspectos do preparo concluiu-se que o sistema Race mostrou ausência de desvio apical, ação sobre todas as paredes dentinárias, deslocamento do preparo em direção às paredes externa da curvatura e vestibular do canal radicular, ampliação da área nos terços médio e apical, superfícies dentinárias regulares, formato irregular e pequena quantidade de resíduos na luz do canal radicular.


There is an usually endodontic evolution thus rotary systems and techniques has been created and evaluated by several authors by different methods. The purpose of this study was to investigate root canal aspects and the methods employed to evaluate the root canal preparation. Mesiobuccal canals of ten maxillary molars extracted human were included in blocks of resin and split across the middle and apical thirds. The root canals were prepared by RaCe rotary files. The prepare analysis was done through the Radiographic Platform, Bramante method and Histological method. It was observed that before the methods standardization it can get consistent results between each one even when assessing different aspects of the root canal preparation. It was concluded that studies that evaluate the same aspect of the preparation may show different results and these are associated with variables inherent in each methodology employee. All the methods supplies important information about root canal preparation. However, it is not should be separately considered. In accord to the evaluated aspect a method can supplies the other one and get reliable results. In relation to the aspects of the preparation it was concluded that the Race system showed apical deviation absence, action on all the walls, displacement to the external curvature walls and vestibular, magnifying of the area, regular surfaces, irregular format and small amount of residues inside the root canal.


Subject(s)
Root Canal Preparation/instrumentation , Root Canal Preparation/methods
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