NSK reciprocating handpiece: in vitro comparative analysis of dentinal removal during root canal preparation by different operators
| Autor: | Magda de Souza Reis, Antônio Luiz Rocha Fernandes, Luciano Loureiro Mello, Ronise Ferreira, Márcia Helena Wagner, Fernando Branco Barletta |
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| Rok vydání: | 2006 |
| Předmět: |
Analysis of Variance
medicine.medical_specialty Rotation business.industry Root canal Significant difference Dentistry General dentist Endodontics Dental High-Speed Equipment Reciprocating motion medicine.anatomical_structure stomatognathic system Statistical significance Dentin medicine Humans Rotary instrumentation business General Dentistry Root Canal Preparation |
| Zdroj: | Brazilian Dental Journal. 17:10-14 |
| ISSN: | 0103-6440 |
| DOI: | 10.1590/s0103-64402006000100003 |
| Popis: | The purpose of this study was to assess dentin removal during root canal preparation by different operators using a NSK reciprocating handpiece. Eighty-four human single-rooted mandibular premolars were hand instrumented using Triple-Flex stainless-steel files (Kerr) up to #30, weighed in analytical balance and randomly assigned to 4 groups (n=21). All specimens were mechanically prepared at the working length with #35 to #45 Triple-Flex files (Kerr) coupled to a NSK (TEP-E10R, Nakanishi Inc.) reciprocating handpiece powered by an electric motor (Endo Plus; VK Driller). Groups 1 to 4 were prepared by a professor of Endodontics, an endodontist, a third-year dental student and a general dentist, respectively. Teeth were reweighed after root canal preparation. The difference between weights was calculated and the means of dentin removal in each group were analyzed statistically by ANOVA and Tukey's test at 5 % significance level. The greatest amount of dentin removal was found in group 4, followed by groups 2, 3 and 1. Group 4 differed statistically from the other groups regarding dentin removal means [p |
| Databáze: | OpenAIRE |
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