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Canal transportation after root canal instrumentation: a comparative study with computed tomography
Mateus Silveira Martins Hartmann1, Fernando Branco Barletta, Vânia Regina Camargo Fontanella
1Lutheran University of Brazil, Department of Dentistry and Endodontics, School of Dentistry, Canoas, RS, Brazil. mateushartmann@terra.com.br
Journal of Endodontics
|September 20, 2007
Summary
Manual K-file endodontic instrumentation resulted in less canal transportation than oscillatory or rotary systems. All tested techniques caused some degree of root canal transportation.
Area of Science:
- Endodontics
- Dental Imaging
- Biomaterials
Background:
- Root canal preparation aims to clean and shape the root canal system.
- Canal transportation, or deviation from the original canal path, can affect treatment outcomes.
- Various instrumentation techniques exist, each with potential advantages and disadvantages regarding transportation.
Purpose of the Study:
- To compare the degree of canal transportation in the apical third of maxillary molar mesiobuccal canals using three different instrumentation techniques.
- To evaluate the influence of manual K-files, oscillatory K-files, and ProTaper NiTi rotary systems on root canal geometry.
Main Methods:
- An in vitro study involving 60 maxillary molars.
- Root canals were instrumented using hand K-files, oscillatory K-files, or ProTaper NiTi rotary systems.
- Computed tomography (CT) was used to obtain 3D images before and after instrumentation to measure canal transportation.
Main Results:
- The manual K-file technique produced significantly less canal transportation (0.10 mm) compared to the oscillatory (0.37 mm) and rotary (0.22 mm) techniques.
- All investigated instrumentation techniques resulted in some degree of canal transportation.
- Statistical analysis showed a significant difference between the techniques (P=.021).
Conclusions:
- Manual K-file instrumentation appears to cause less apical transportation in mesiobuccal canals compared to oscillatory and rotary systems.
- Endodontic instrumentation techniques, regardless of type, can lead to changes in root canal morphology.
- Further research may explore long-term clinical implications of these findings.
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