Retreatment efficacy of hand versus automated instrumentation in oval-shaped root canals: an ex vivo study.
Int Endod J
; 39(7): 521-6, 2006 Jul.
Article
em En
| MEDLINE
| ID: mdl-16776756
AIM: To compare the efficacy of hand versus automated instrumentation when retreating oval-shaped root canals. METHODOLOGY: Sixty human premolars with single oval canals were instrumented and filled with gutta-percha and sealer and divided into three groups (n = 20)--group 1: ProFile .04 taper rotary instruments; group 2: Anatomic Endodontic Technology (AET), and group 3: manual instrumentation with Hedström files. The teeth were split longitudinally and gutta-percha/sealer remnants in the coronal, middle and apical thirds were assessed with light microscopy. The mean percentage of gutta-percha/sealer remnants for each group was calculated and statistically analysed for significance using an ANOVA repeated measures (P < 0.001) and Tukey's multiple comparison test. The time required for retreatment was analysed using a one-way ANOVA and Tukey's test (P < 0.001). RESULTS: Overall, 10-18% of the canal walls were covered with gutta-percha/sealer remnants after preparation using any technique. Statistical analysis demonstrated that the mean values for remnants of filling material in the ProFile group were significantly higher than for the other groups (P < 0.001), except in the apical third where no significant difference occurred. In all groups, the mean values in the middle third were higher than the coronal and apical thirds. The retreatment time for ProFile and AET was significantly shorter compared to manual instrumentation with Hedström files (P < 0.001). CONCLUSIONS: Under the experimental conditions, AET instruments and manual instrumentation with Hedström files resulted in cleaner canals. However, completely clean root canal walls were not produced with any of the techniques investigated.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Preparo de Canal Radicular
/
Cavidade Pulpar
Tipo de estudo:
Clinical_trials
Limite:
Humans
Idioma:
En
Revista:
Int Endod J
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Reino Unido