![]() ![]() West advocates using these files in a vertical in-and-out motion with initial amplitudes of 1 mm, gradually increasing as the dentine wall wears away and the file advances apically. 17,18Īccording to West, a glide path is present when a size 10 stainless- steel K-File fits loosely in the canal. Any instrumentation that removes excessive dentine and changes the canal anatomy significantly will cause iatrogenic preparation errors and may adversely affect the strength of the tooth. 16 The converse, therefore, follows: procedural errors initiated during glide path enlargement are more likely to be exacerbated during shaping by larger NiTi rotary files, in this way affecting the clinical outcome. 11,12,14,15 According to West, a successful glide path will most likely be maintained by larger shaping instruments, and must then be the starting point of all root canal treatment. 11-13Ī number of studies have illustrated the many benefits of glide path formation, which include decreased canal aberrations and decreased risk of shaping file fracture. Glide path enlargement allows for more effective and safer rotary shaping because it guarantees that the root canal diameter is sufficiently large to receive the first shaping instrument. Predictable radicular cleaning and shaping is more likely after an established glide path has been formed that is smooth and centred from the root canal orifice to the physiologic terminus. 9,10 Systems like the ProGlider (Dentsply Sirona, Ballaigues, Switzerland), and G-Files (Micro-Mega, Besançon, France) are said to preserve the original canal anatomy and cause fewer aberrations and modifications of canal curvature. Mechanical (NiTi) glide path systems have been shown to improve the glide path prior to the use of NiTi shaping instruments. 6 Over the last few years, research has repeatedly shown that NiTi glide path rotary instruments are capable of achieving a safe and predictable glide path in comparison with hand files. ![]() 5 The use of hand files, however, has been shown to be more time consuming, particularly in teeth with constricted and/or severely curved canals. The glide path can be achieved with both hand- and rotary instruments. ![]() 2 Apical pre-enlargement tends to minimise biomechanical preparation failures such as canal transportation and ledge formation at different levels and also reduces the number of pecking motions required to achieve the working length. 1 A successful glide path is an uninterrupted passage that can be reproduced when small-size files are used in sequence in the canal. The endodontic glide path is defined as a smooth, patent passage from the coronal orifice of the canal to the radiographic terminus or electronically determined portal of exit. In this paper the authors discuss a review of the literature on some of these glide path techniques and illustrate the correct clinical application of some of these preparation techniques through clinical case studies. Many authors have proposed that rotary nickel titanium (NiTi) instruments should not be used for canal preparation without prior glide path preparation. Glide path enlargement allows for safer, more effective canal shaping with increased prospects of successful treatment outcomes. Maintaining a smooth, reproducible, glide path when successive files are used is an important characteristic of proper root canal preparation. IVBChD, MSc, DSc (Pret), Department of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa IIIBChD (Stell), Dip Odont (Endo), MSc (Pret), Department of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa IIBChD (Pret), PG Dip Dent (Endo), MSc (Pret), Department of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa IBChD, PG Dip Dent (Endo), PG Dip Dent (Aesthet Dent), MSc, PhD (Pret), Department of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa and Private Practice, Sandton, South Africa ![]() PJ van der Vyver I M Vorster II F Paleker III FA de Wet IV Glide path preparation in Endodontics: case report and a literature review of available materials and techniques ![]()
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