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10.03.2018 | Original Article

Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study

verfasst von: Camila Galletti Espir, Camila Almeida Nascimento-Mendes, Juliane Maria Guerreiro-Tanomaru, Bruno Cavalini Cavenago, Marco Antonio Hungaro Duarte, Mário Tanomaru-Filho

Erschienen in: Clinical Oral Investigations | Ausgabe 9/2018

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Abstract

Objectives

To evaluate the shaping ability and cleaning after oval root canal preparation using one or more instruments in reciprocating or rotary motion.

Materials and methods

Oval-shaped mandibular incisors were selected, based on the radiographic diameter (2 ≤ diameter ratio ≤ 4), and assigned according to root canal preparation (n = 18): single-file (Reciproc R40); two reciprocating files (Unicone size 20 and 40, .06 taper) or Mtwo rotary files until a size 40, .06 taper instrument. Root canal preparations were performed using an open root canal model. Scanning was performed before and after preparation using SkyScan 1176 with a voxel size of 17.42 μm. Volume, percentage of debris, and percentage of uninstrumented surface were analyzed in the entire root canal and in each root canal third. Data were compared using ANOVA and Tukey or Kruskal-Wallis and Dunn tests (α = 5%).

Results

The initial volume were similar among the groups (p > .05). Unicone preparation was associated with higher debris, increase in root canal volume and uninstrumented surface in entire root canal and in the middle third (P < .05). Mtwo was associated with lower uninstrumented surface in the entire root canal and in the cervical third. The apical third were similar for the three preparations.

Conclusions

Unicone system using two instruments in reciprocating motion resulted in higher increase in volume. However, less remaining debris was observed when Reciproc single-file and Mtwo rotary systems were used.

Clinical relevance

A preparation that volumetrically increases the root canal is not necessarily associated with better cleaning. Shaping and hard-tissue debris removal depends on root canal anatomy, kinematics, number of instruments, and instrument design.

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Titel: Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study
verfasst von: Camila Galletti Espir
Camila Almeida Nascimento-Mendes
Juliane Maria Guerreiro-Tanomaru
Bruno Cavalini Cavenago
Marco Antonio Hungaro Duarte
Mário Tanomaru-Filho
Publikationsdatum: 10.03.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 9/2018
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-018-2411-4

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Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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