![]() ![]() Most clinicians have only asked themselves whether they want to use hand files vs. Without considering the preparation result desired it is difficult to choose an instrumentation system, as it would be difficult to choose a mode of transportation without knowing where you wanted to go. Often lost in this cacophony of information about rotary shaping instruments is the issue of shaping objectives. The importance of shaping objectivities and obtaining it with a reduced file set Do we look only at the cutting efficiency of a file blade during the use of a single file in a single cutting cycle, or do we consider the number of instruments and steps necessary to complete the root canal preparation? Do we compare files relative to how long they can cut in an apical direction before their flute spaces are jammed with debris? While sharper cutting flutes decrease friction and the resultant torsional stresses accumulated in a file during cutting, they significantly increase the amount of transportation from the original canal path in curved canals.īeyond the difficulties of understanding factors that come to bear in safety objectives, it is no less obscure to determine how these geometric variants affect efficiency. ![]() While larger core diameters enhance a file’s resistance to torsional stresses in straight canals, they radically increase their susceptibility to cyclic fatigue in curved canals. However, as simple as the concept of safety seems, the multivariate and often oppositional functional characteristics of file geometry make for a serious analytical challenge.Įxamples of these countervailing features are abundant. Ironically, the difficult challenges of delivering the universal requirements were rewarded serendipitously in delivering the more specific needs of the international market.įirst off, I was gratified to note that the first 2 are both related to safety, as it should be. A shaping method requiring fewer files to accomplish an ideal preparation.A simplified method of cutting initial shapes in root canals.When dentists were polled, they universally said that what they want from their shaping files were, in this order:Ī second list of requirements in international market and increasingly in the US and Canada, were, in this order: After two years, the GT Series X (GTX) endodontic system was introduced at the Annual Meeting of the American Dental Association in October 2007 and is scheduled for worldwide distribution in the spring of 2008. ![]() The GT rotary shaping system was introduced to the US market in 1996 and to the rest of the world 18 months afterwards, and while it took the US by storm, it met with more resistance internationally – due to the differences in the dentist’s populations, competitive environments, and the way the product was delivered to the end user.Īs I approached the redesign and development of what would become the first true ‘next generation’ of this product line, I took the broader needs of those performing root canal treatments everywhere into consideration. Redesigning a standard for worldwide appeal ![]()
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