Related Experiment Videos
Shaping ability of GTTM Rotary Files in simulated resin root canals
F L G Calberson1, C A J G Deroose, G M G Hommez
1Department of Operative Dentistry and Endodontology, Dental School, Ghent University Hospital, Ghent University, Belgium.
International Endodontic Journal
|August 23, 2002
Summary
GT Rotary Files demonstrated acceptable shaping in simulated root canals. Canal straight section length, not curve angle, primarily dictated transportation direction in narrow, curved canals.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Root canal preparation aims to achieve optimal cleaning and shaping.
- Rotary instruments offer efficiency but can alter canal morphology.
Purpose of the Study:
- To evaluate the shaping ability of GT Rotary Files in simulated root canals with varying curvature.
- To assess canal transportation and instrument behavior during preparation.
Main Methods:
- Forty simulated root canals with different curvature angles (40°, 60°) and straight section lengths (8mm, 12mm) were prepared.
- A crown-down/stepback technique was employed using GT Rotary Files.
- Pre- and post-operative images were analyzed using an image analysis system to measure canal aberrations.
Main Results:
- GT Rotary Files produced acceptable canal shapes with minimal ledges and zips.
- Instrument deformation occurred, particularly with 0.04 taper instruments in 60° curves.
- Canal transportation was influenced by the length of the straight canal section, with longer sections leading to inner aspect transportation.
Conclusions:
- GT Rotary Files exhibit acceptable shaping ability in simulated root canals.
- The length of the canal's straight section is a critical factor influencing transportation direction over curve angle.
- Instrument design and canal anatomy interact, potentially leading to deformation in challenging curvatures.