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1.
Rev. Asoc. Odontol. Argent ; 104(4): 175-181, oct.-dic. 2016. tab
Article in Spanish | LILACS | ID: biblio-869382

ABSTRACT

Objetivo: el objetivo de este estudio fue evaluar la calidad de las obturaciones endodónticas en molares superiores instrumentados con técnicas manuales y rotatorias, por estudiantes de posgrado. Materiales y métodos: para este estudio, se analizaron las radiografías de endodoncias que fueron realizadas durante un año por alumnos de un curso de posgrado en endodoncia, en primeros y segundos molares superiores, con ténicas de instrumentación manual y rotatoria y posteriormente obturadas con técnica de condensación lateral. Se analizó la calidad de las obturaciones endodónticas en función de la longitud y la homogeneidad de la masa de gutapercha. Resultados: el 53,6 por ciento de las obturaciones estaba dentro de los límites del conducto radicular y en el 65,2 por ciento de los casos, la homogeneidad fue incorrecta. En cuanto a la longitud, no se verificaron diferencias estadísticamente significativas entre las técnicas, como ocurrió con la homogeneidad (p<0,05). La frecuencia de inadecuados en ewsta última fue mayor para la técnica manual. La mayor cantidad de fallas en la obturación se registró en el conducto mesiovestibular. Conclusión: la calidad de las obturaciones no depende de la técnica de instrumentación empleada, sino de la experiencia del profesional interviniente y del tipo de conducto radicular tratado.(AU)


Aim: the aim of this study was to evaluate the quality ofendodontic fillings in upper molars instrumented with manualand rotary techniques by posgraduate students.Materials and methods: Radiographs of first and secondupper molars root canal treatments performed by studentsof a posgraduate endodontic course during a year wereanalyzed. Either manual or rotary instrumentation techniqueswere used and obturation was carried out using lateral condensation.Quality of endodontic obturation was analyzed accordingto length and homogeneity.Results: There were acceptable lengths of root canalfillings in 53.6% and homogeneity was incorrect in 65.2% ofthe cases. There was no statistically significance difference betweentechniques for the case of length, but there were statisticallysignificance difference for homogenity (p>0.05). Moredefective obturations were registered in the mesiobuccal canal.Conclusion: Independent of the instrumentation technique,the quality of root fillings is inherent to the professionalexperience and the type of root canal treated.


Subject(s)
Humans , Education, Dental, Graduate/methods , Root Canal Obturation/statistics & numerical data , Root Canal Preparation/methods , Quality Control , Dental High-Speed Technique/methods , Dental Instruments , Maxilla , Molar , Radiography, Dental , Rotation , Data Interpretation, Statistical
2.
ROBRAC ; 20(52)abr. 2011. ilus, tab
Article in Portuguese | LILACS | ID: lil-609180

ABSTRACT

Objetivo: Esta pesquisa refere-se ao estudo da anatomia interna da raiz mésio-vestibular dos primeiros e segundos molares superiores permanentes. Material e método: Duzentos e vinte cinco molares tiveram a sua raiz mésio-vestibular seccionada ao nível amelo-cementário e, visualmente, com auxílio de sonda exploradora, foram selecionadas aquelas que apresentaram na região cervical, dois orifícos correspondentes às entradas dos condutos mésio-vestibular e mésio-palatino, perfazendo um total de cem raízes (44,44 %). Todas elas foram submetidas ao processo de diafanização, associada à injeção de hematoxilina, que confere transparência às raízes e coloração aos condutos, permitindo, assim, a avaliação tridimensional da anatomia dental interna. Resultados: A presença de dois condutos percorrendo toda a raiz e terminando separados em dois forames foi observada em 46% da amostra, sendo que 68% em altura apical distinta e, a percentagem de condutos que se fusionaram nos terços cervical, médio ou apical e terminaram em um forame foi de 53%. Encontrou-se, também, uma raiz com três condutos e oito dentes com uma raiz extra, correspondente ao canal mésio-palatino. Conclusão: Os resultados mostraram que a incidência expressiva de mais de um conduto na raiz mésio-vestibular e o complexo sistema de canais que ela apresenta, pode ter grande influência no sucesso dos tratamentos endodônticos dos molares superiores, exigindo, por isso, atenção especial do endodontista.


Aim: This research concerns the study of the internal anatomy of the mesiobuccal root of the first and second permanent maxillary molars. Material and methods: Two hundred and twenty five molars had their mesiobuccal root sectioned at the amelo-cemental. With the aid of the exploratory probe it was conducted a visual selection of the roots that presented at the cervical region two orifices corresponding to the entries of the mesiobuccal and mesiopalatal conduits. The total amount was of one hundred roots (44,44%). All of them underwent the process of diafanization associated with the injection of hematoxylin, what brings transparency to the roots and coloration to the ducts, thus enabling three-dimensional evaluation of the internal dental anatomy. Results: The presence of two conduits running through the entire root and ending in two separate foramina was observed in 46% of the sample, 68% in distinct apical height. The percentage of the conduits that merged at cervical, middle or apical thirds and ended in a foramen was of 53%. It was also found a root with three conduits and eight teeth with an extra root, corresponding to the mesio-palatal canal. Conclusions: The results showed that the expressive incidence of more than one conduit at the mesiobuccal root and the complex system of canals that it presents can have a great influence on the success of treatments of the upper molars, therefore requiring special attention from the endodontist.

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