Root Canal Shaping Using Rotary Nickel‐Titanium Files in Preclinical Dental Education in Turkey

Abstract

The purposes of this study were to evaluate the ability of a group of third-year dental students without any endodontic clinical experience to use the ProTaper Instruments (Dentsply Maillefer) to decrease the amount of straightening of curved canals on human molar teeth and to determine the incidence of instrument fractures and instrumentation time. Thirty-one undergraduate dental students in Turkey received a training session. The students prepared a total of 144 root canals in human mandibular or maxillary molar teeth with ProTaper. Fifty-six teeth were excluded due to unreadable image, misinformation, or straight or severe curve. Using pre-and post-preparation digital radiographs, the straightening of curved root canals was investigated. Loss of working length and incidence of fracture were also noted. A total of eighty-eight curved root canals were selected. Mesiobuccal or mesiolingual roots with curvatures of between 20° and 43° as assessed by Schneider's method and working length of between 15 mm and 22.5 mm were included in the study. The means of the curved root canals before and after the instrumentation were 29.5° ±6° and 27° ±6.3°, respectively. The means of the working length before and after the instrumentation were 19 mm ±2.1 mm and 18.3 mm ±1.9 mm, respectively. A statistically signiicant difference between straightening of curved root canals and loss of working length was found between before and after instrumentation (p<0.000). The mean straightening of curved root canals and loss of working length after preparation with the size F1 ProTaper ile were 2.5 mm ±3.6 mm and 0.7 mm ±0.6 mm, respectively. Only two F1 ProTaper instruments fractured at the apical level. The study concluded that rotary instruments performed adequately with inexperienced operators who received a brief structured training session.Dr. Ünal is in the

Peer Review #3 of "A comparative study of root canal shaping using protaper universal and protaper next rotary files in preclinical dental education (v0.1)"

“…Sonntag et al (2008) found that preclinical endodontics training varied significantly according to the curriculum, instructor, and course content, and they announced that, as of 2008, most (63%) faculties in Germany taught root canal instrumentation with rotary Ni-Ti instruments. Unal et al (2012) reported that third-year students with no experience with rotating instruments were successful in molar root canal preparations after 2 h of theoretical education about rotary instruments. Britojúnior et al (2014) reported that undergraduate students produced lower apical transportation in curved canals with F1 and F2 PTU files.…”

“…In the literature, there are many different experiments to evaluate the shaping and cleaning of the root canal. Artificial resin models are preferred in many studies because having a standard canal length, curvature, and form (Kum et al, 2000;Unal et al, 2009;Unal et al, 2012). The µCT is emerging in several endodontic research facilities as a nondestructive and accurate method to analyze canal geometry and the relative effects PeerJ reviewing PDF | (2018:12:33341:1:1:NEW 14 Jun 2019)…”

“…The smaller the size of this file than the F2 PTU file, the less straightening it may have caused. Besides, the shaping ability of the files was examined in acrylic resin blocks in our study, while Unal et al (2012) Manuscript to be reviewed change, and this shape change is called deformation. After the force is removed, the permanent shape change that cannot be returned to its original state is called plastic deformation (Thompson 2000).…”

“…ESE believes that undergraduate students should receive preclinical and clinical training to be able to successfully treat uncomplicated anterior premolar and molar teeth (De Moor et al, 2013). Endodontic education needs to be developed in undergraduate programs (Dummer, 1991;Qualtrough & Dummer, 1997;Unal et al, 2012) and the use of new techniques and devices that have proven to be positive contributions to root canal therapy should be included in undergraduate training programs (Unal et al, 2011).…”

Quality of Preclinical and Clinical Root Canal Fillings performed by Undergraduate Students on Single-rooted Teeth

“…With simulation clinics and training, preclinical laboratories improve the student's performance regarding cleaning, shaping and root canal fillings (RCF). 1,2 The sedimentation of knowledge takes place through the clinical application of the acquired instructions and complements the teachinglearning process. 3 Another educational objective includes the evaluation of the endodontic therapy outcome.…”