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Randomized Controlled Trial
. 2009 Nov-Dec;17(6):590-5.
doi: 10.1590/s1678-77572009000600010.

Assessment of canal walls after biomechanical preparation of root canals instrumented with Protaper Universal rotary system

Carlos Menezes Aguiar  1 , Daniela de Andrade Mendes, Andréa Cruz Câmara, Antonio Poli de Figueiredo
Affiliations
Randomized Controlled Trial

Assessment of canal walls after biomechanical preparation of root canals instrumented with Protaper Universal rotary system

Carlos Menezes Aguiar et al. J Appl Oral Sci. 2009 Nov-Dec.

Abstract

Objective: The aim of this study was to examine the instrumented walls of root canals prepared with the ProTaper Universal rotary system.

Material and methods: Twenty mesiobuccal canals of human first mandibular molars were divided into 2 groups of 10 specimens each and embedded in a muffle system. The root canals were transversely sectioned 3 mm short of the apex before preparation and remounted in their molds. All root canals were prepared with ProTaper Universal rotary system or with Nitiflex files. The pre and postoperative images of the apical thirds viewed with a stereoscopic magnifier (X45) were captured digitally for further analysis. Data were analyzed statistically by Fisher's exact test and Chi-square test at 5% significance level.

Results: The differences observed between the instrumented and the noninstrumented walls were not statistically significant (p<0.05).

Conclusions: The Nitiflex files and the ProTaper Universal rotary system failed to instrument all the root canal walls.

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Figures

FIGURE 1
FIGURE 1. Preoperative image (left) and postoperative image (right) showing the absence of instrumentation at the lingual wall (arrow). M, mesial; D, distal; V, buccal; L, lingual (×45)
FIGURE 2
FIGURE 2. Preoperative image (left) and postoperative image (right) showing complete instrumentation of the walls. M, mesial; D, distal; V, buccal; L, lingual (×45)
See this image and copyright information in PMC

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