Influence of the Glide Path Caliber on the Fracture of Rotary Instruments
DOI:
https://doi.org/10.56818/odontologia.v1i1.8Keywords:
manual pre-flaring, mechanical instrumentation, fracture of instruments, ProTaper, rotary instrumentsAbstract
During endodontic procedures, the potential for instrument fracture is present; Any attempt must be made to avoid this complication, because its solution is complex, requiring skill, equipment and time. Aim: To evaluate the influence of manual glide path caliber on the fracture frequency of mechanical rotary instruments. Methodology: Recently extracted mandibular molars were selected, permeabilizing the canals with K08 and 10 files, independent canals were included. Radiographs with K10 inside, applying the Pruett method, recording the maximum value for the angle and the minimum value for the radius between the two views (clinical and proximal). The teeth were classified according to the angle and radius of curvature and the initial apical caliber, using the mesiobuccal canal with one group and the mesiolingual canal with another. The sample was 60 canals. Groups were randomly assigned. The glide path was performed, with a K file, balanced force technique, irrigating between files. An inexperienced operator mechanically instrumented according to the
manufacturer's sequence, the number of uses of each instrument was controlled, each instrument used was observed with a microscope, and the fractures were confirmed radiographically. The data obtained were analyzed using Proportions Test and One Way ANOVA Test. A p-value ≤ 0.05 was established. Results: 6 instruments were separated when the glyde path was performed up to K10, 5 up to K15 and 1 up to K20. Conclusions: The caliber of the manual glide path influences the fracture frequency of mechanical rotary instruments, when it is performed by inexperienced operators.
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