Micro-CT Evaluation of Glide Path with Nickel-Titanium Rotary PathFile in Maxillary First Molars Curved Canals

In this study, conventional X-ray computed microtomography was used to compare the ability of manual and mechanical glide path to maintain the original root canal anatomy.

D. Pasqualini et. al; Journal of Endodontics, 38 (2012) 389-393.

Nickel-titanium (NiTi) rotary instruments reduce operator fatigue, the time required for shaping, and the risk of procedural errors associated with root canal instrumentation. Superelasticity properties enable NiTi rotary files to be placed in curved canals exerting less lateral forces on the canal walls and maintaining the original canal shape. NiTi rotary tools have unique design properties in terms of crosssectional shape, taper, tip, and number and angle of flutes. Preserving root canal anatomy represents a major issue difficult to overcome. Coronal enlargement and manual or mechanical preflaring to create a glide path was shown to be the first step for a safer use of NiTi rotary instrumentation because it prevents fractures of torsion instruments and shaping aberrations. Recently, NiTi rotary PathFiles were introduced to improve mechanical glide path. These instruments are more capable of maintaining the original canal anatomy and cause less aberrations and modifications of canal curvature compared with manual preflaring performed with stainless-steel K-files.

Our analyses confirmed that NiTi rotary PathFiles enable an optimal glide path for the NiTi rotary instruments used afterward. These instruments actually have high root canal centering ability and cause less modifications of the canal curvature and fewer canal aberrations. In fact, they showed to preserve the original canal shape considerably better than manual stainlesssteel instruments.

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Computed Micro-tomographic Evaluation of Glide Path with Nickel-Titanium Rotary PathFile in Maxillary First Molars Curved Canals, D. Pasqualini, C.C. Bianchi, D.S. Paolino, L. Mancini, A. Cemenasco, G. Cantatore, A. Castellucci, E. Berutti, Journal of Endodontics, 38 (2012) 389-393, doi:10.1016/j.joen.2011.11.011.
Last Updated on Friday, 20 April 2012 15:10