An In vitro Comparison between Endodontic Hand and Rotary Instruments in Root canal Preparations
An In vitro Comparison between Endodontic Hand and Rotary Instruments in Root canal Preparations
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Date
2015-03-31
Authors
Abdelrawouf, Azza
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Publisher
UOFK
Abstract
Objectives: This study aims to compare hand stainless steel K-files and
Nickel titanium Profile 0.04 taper 29 series rotary instruments in root canal
preparation on permanent premolars. For their efficiency in canals shaping
with maintenance of original canal shape, procedural errors that occur during
preparations of the canals or the instruments and time consumed in canals
preparation by both methods.
Materials and methods: About 46 freshly bilaterally extracted first
premolars for orthodontic purpose were selected. They were further divided
into two groups, each group comprise 23 teeth with sum of 34 canals, group
I and group II. In group I teeth were prepared with hand stainless steel kfiles
and group II were prepared with profile 0.4 taper series 29 rotary files.
Impression material were introduced to the lumen of the prepared canals and
the three dimensional shape of the prepared canals were assessed under
magnification of stereomicroscope to assess the efficiency in preparing
canals including canal smoothness, flow and taper.
Results: results showed significantly shorter preparation time for Profile
0.04 taper than that of K-file. During canals preparations, about 8.8% of
canals prepared with hand K-file showed canal blockage, change of working
distance appeared in 23.5% of canals prepared with K-file and 11.7% in
canals prepared with Profile. Failed instruments were significantly higher in
K-files; the failure was in the form of deformation in most of cases. Profiles
failed instruments were in the form of fracture and no deformation detected.
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Both systems showed unsatisfactory quality of walls smoothness and flow.
Good taper characteristic were highly significant in K-files preparations.
Conclusion: Profile 0.04 rotary files prepared canals quicker than hand Kfiles
and showed less instruments failures. Stainless steel K-file showed
better results in regard to canals taper, suggesting the use of a technique that
combines the two systems in canals preparation to overcome problems
associated with each system
Description
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Keywords
An In vitro Comparison between Endodontic Hand and Rotary Instruments in Root canal Preparations