ORIGINAL ARTICLE

 

Comparative assessment of root canal preparation by undergraduate students using manual and automated devices

 

Avaliação comparativa do preparo do canal radicular realizado por alunos de graduação com os sistemas manual e oscilatório

 

 

Andréa Cabral de Mello Vanzin^I; Fernando Branco Barletta^{II, III}; Vania Fontanella^{II, IV}

^IPontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
^IILutheran University of Brasil (ULBRA), Canoas, RS, Brazil
^IIIUniversity of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, RS, Brazil
^IVFederal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil

Correspondence

 

 

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ABSTRACT

PURPOSE: To evaluate the preparation of root canals performed by undergraduate students using manual and automated devices, based on the amount of dentin removed from the canal walls, the time required for preparation, and students' opinions.
METHODS: Mesial roots of 20 human mandibular molars extracted for clinical reasons were used in the experiment. Twenty undergraduate students prepared two canals each, one using the manual method and the other using an automated device; following root canal preparation, the students filled out a questionnaire. Time was recorded throughout the procedures. Teeth were scanned with computed tomography before and after preparation. Images were superimposed and measured for the amount and area of dentin removed.
RESULTS: There was no difference between the use of manual and automated devices with regard to the amount of material removed. Distal walls presented a greater amount of material removed from the cervical third when compared with middle third in both techniques. There were no statistically significant differences between both techniques with regard to preparation time.
CONCLUSION: The automated system represents an adequate alternative option as an auxiliary resource for undergraduate teaching in the preparation of root canals.

Key words: Endodontics; instrumentation; root canal therapy; X-ray computed tomography

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RESUMO

OBJETIVO: Avaliar o preparo do canal radicular realizado por alunos de graduação com os sistemas manual e oscilatório, considerando o desgaste produzido nas paredes do mesmo, o tempo de trabalho e a opinião dos estudantes.
METODOLOGIA: Foram utilizadas raízes mesiais de 20 molares inferiores humanos extraídos por indicação clínica. Vinte alunos de graduação realizaram o preparo de dois canais, um deles com o sistema manual e o outro com o sistema oscilatório, e posteriormente responderam a um questionário. O tempo foi registrado durante os preparos. Os dentes foram examinados por tomografia computadorizada antes e após o preparo. As imagens foram sobrepostas e as áreas de contorno demarcadas. Medidas lineares e da área de desgaste foram realizadas.
RESULTADOS: Não houve diferença entre as técnicas quanto à medida linear de desgaste. A parede distal apresentou maior desgaste no terço cervical do que no médio em ambas as técnicas. A área total de desgaste foi maior no terço cervical do que no médio. Com relação ao tempo de preparo, não houve diferença estatisticamente significante entre as duas técnicas.
CONCLUSÃO: O sistema oscilatório constitui-se em um recurso auxiliar para o preparo do canal radicular no ensino de graduação.

Palavras-chave: Endodontia; instrumentação; tratamento do canal radicular; tomografia computadorizada por raios-X

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Correspondence:
Vania Regina Camargo Fontanella
Rua Coronel Paulino Teixeira, 169/403
Porto Alegre, RS - Brazil 90420-160
E-mail: vaniafontanella@terra.com.br

Received: March 5, 2009
Accepted: September 8, 2009