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UBC Theses and Dissertations

Evaluation of canal instrumentation using GT-Series-X™ versus ProSystem GT™ Tabatabaei, Neda


Preparation of the root canal system is recognized as being one of the most important stages in root canal treatment. A variety of instrumentation techniques have been described for this stage of root canal treatment. Two recently introduced rotary instrument systems are ProSystem GT™ and GT-Series-X™. The aim of this study is to compare the ability of two nickel- titanium rotary file systems, GT-Series-X™, and ProSystem GT™, to maintain the original canal path using a split-mold design (the endodontic cube). The hypothesis is that ProSystem GT™ will create greater canal center displacement in comparison with GT-Series-X™ files due to more chip spaces and fewer cutting flutes in the latter. Methods: Mesial roots of 31 mandibular first and second molar teeth with separate ML and MB canals and curvatures ranging from 15 to 40 degrees were randomly divided into two groups. After access cavity preparation and working length determination, each tooth was embedded in composite resin using the endodontic cube as a mold. 1.5mm tooth-resin complex slices were made using a Buehler ™ slow speed saw. After reassembly of the sections, canals were instrumented with either GT-Series-X™ or ProSystem GT™ to size 30/06. AutoCAD™ software was used to measure root section images of instrumented canals. Data was analyzed using the t-test (p<0.05). Results: The canal center displacement of the ProSystem GT™ was 0.08 ± 0.074mm while for GT-Series-X™ it was 0.064 ± 0.063mm (p<0.05). Conclusion: Both systems tended to move the original canal toward the furcation, but ProSystem GT™ caused significantly greater canal center displacement.

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