UNASSIGNED: the three-dimensional fluid-tight obturation of the root canal system ends the endodontic treatment process and the technical quality of obturation of the root canal (RC) is a determinant of the outcome of the treatment. This final stage of RCT is critical in the outcome of treatment, thus the need to have adequate and quality obturation. The audit of the performance of students in this aspect evaluates performances and identifies where there is a need for improvement. Therefore, we set out to evaluate the quality of root canal obturation performed by undergraduate and postgraduate clinical dental students.
UNASSIGNED: a cross-sectional study that evaluated the root canal obturation performed by undergraduate and postgraduate students in a teaching hospital, for 1 year. The radiographic evaluation was done by calibrated assessors. The radiographs were viewed under magnifying lenses (x3.5). The adequacy of length and homogeneity of the density of obturation were the outcome variables assessed in all the categories of teeth treated among patients who are 18 years and above, seen during the study period.
UNASSIGNED: eighty-four maxillary and 36 mandibular teeth were root-filled in 97 patients with a mean age of 37.6 years ± 14.7 SD. A good proportion (47.5%) of the root fillings were done by the postgraduate doctors. Most of the canals (69.4%) had acceptable lengths while density was acceptable in only 37.7%. Slightly over half of canals with acceptable length (64 out of 127; 50.4%) were reported in teeth with single canals (p=0.000) likewise with density (28;40.6%). Overall acceptable length and root filling density was 28.9% and there was no statistical significance in the performances of the operators in relation to the length of root filling (p=0.109), and density (p=0.55).
UNASSIGNED: the overall acceptable length and root filling density was 28.9% among both undergraduate and postgraduate students. The adequacy of root canal filling may be dependent on experience, the complexity of the tooth, and the method of instrumentation.

BACKGROUND: Dentistry is a complex field that utilizes both theoretical and practical knowledge along with a distinct coordination of the hand, brain, and eye of an individual, forming a major part of endodontic therapy. Assessing the understanding and practical knowledge of undergraduates from time to time is essential in evaluating the success of the undergraduate education system. Therefore, the purpose of this study was to evaluate the challenges that are associated with endodontic therapy and are faced by undergraduate students at College of Dentistry, Qassim University.  Methodology: Ninety-seven undergraduates who had completed their preclinical training and had done endodontic treatments were included in this questionnaire-based study. The Chi square test and Fisher\'s exact test have been used to determine whether or not there is a significant difference on a categorical scale between two or more groups of study parameters.
RESULTS: According to our results, de-roofing of the pulp chamber and recognizing the canal orifices are the two areas that need more consideration. The gender-wise difference in the challenges faced by the students while performing the majority of steps during endodontic treatment was found to be insignificant. However, a significant difference was noted in relation to the complete deroofing of the pulp chamber (p-value=0.04) and locating the canal orifices (p-value=0.04). Moreover, fifth year students rarely faced difficulties in performing anesthesia and rubber dam placement, whereas fourth year students faced difficulties in both procedures.
CONCLUSIONS: The study concludes that de-roofing the pulp chamber and identifying the orifices of canals are two areas where more attention should be given while training undergraduate dental students.

Artificial teeth in dental training have become a valuable tool for students to gain hands-on experience in a safe and controlled environment. This training method allows students to practice various dental procedures and develop their skills without putting patients at risk. Artificial teeth can be used to simulate dental conditions, allowing students to gain experience in dealing with various situations and techniques. Although previous studies in human dentistry have demonstrated the feasibility of using 3D-printed teeth for teaching endodontic procedures such as root canal therapy, similar research has yet to be conducted in the veterinary field. This study aimed to assess the feasibility of creating 3D-printed teeth from an adult dog skull and validate their use as an alternative training tool for root canal therapy in this species. For this, cone beam computed tomography images from a medium-sized dog skull were used to replicate its teeth using a digital 3D printing system. Then, artificial mandibular first molar teeth and a 24-question survey were sent to specialized veterinary dentistry practitioners in Brazil to assess their perception of the model\'s characteristics during endodontic treatment. In conclusion, it was feasible to create 3D-printed models of dog teeth with high accuracy for the endodontic system. Despite the differences in the properties of the two materials between natural and artificial teeth, it was possible to use the artificial tooth as a training device for conventional endodontic treatment in dogs. The reliability level for the survey was reported as good, displaying a reliability coefficient above 0.86.

OBJECTIVE: To evaluate factors associated with treatment quality of ex vivo root canal treatments performed by undergraduate dental students using different endodontic treatment systems.
METHODS: Four students performed root canal treatment on 80 extracted human teeth using four endodontic treatment systems in designated treatment order following a Latin square design. Lateral seal and length of root canal fillings was radiographically assessed; for lateral seal, a graded visual scale was used. Treatment time was measured separately for access preparation, biomechanical root canal preparation, obturation and for the total procedure. Mishaps were registered. An ANOVA mirroring the Latin square design was performed.
RESULTS: Use of machine-driven nickel-titanium systems resulted in overall better quality scores for lateral seal than use of the manual stainless-steel system. Among systems with machine-driven files, scores did not significantly differ. Use of machine-driven instruments resulted in shorter treatment time than manual instrumentation. Machine-driven systems with few files achieved shorter treatment times. With increasing number of treatments, root canal-filling quality increased, treatment time decreased; a learning curve was plotted. No root canal shaping file separated.
CONCLUSIONS: The use of endodontic treatment systems with machine-driven files led to higher quality lateral seal compared to the manual system. The three contemporary machine-driven systems delivered comparable results regarding quality of root canal fillings; they were safe to use and provided a more efficient workflow than the manual technique. Increasing experience had a positive impact on the quality of root canal fillings while treatment time decreased.

BACKGROUND: Endodontic therapy is often complicated and technically demanding. The aim of this study was to develop a reproducible biomimetic root canal model for pre-clinical and postgraduate endodontic training.
METHODS: A specific ceramic shaping technique (3D printing and slip casting of a root canal mould) was developed to reproduce canal systems with the desired shape and complexity using a microporous hydroxyapatite (HAp)-based matrix. The microstructural morphology, pore size and porosity, as well as the Vickers microhardness of the ceramic simulators (CS) were assessed and were compared with natural dentin and commercial resin blocks. The reproducibility of the root canal shapes was assessed using the Dice-Sørensen similarity index. Endodontic treatments, from refitting the access cavity to obturation, were performed on the CS. Each step was controlled by radiography.
RESULTS: Many properties of the CS were similar to those of natural dental roots, including the mineral component (HAp), porosity (20%, porous CS), pore size (3.4 ± 2.6 μm) and hardness (120.3 ± 18.4 HV).
CONCLUSIONS: We showed that it is possible to reproduce the radio-opacity of a tooth and variations in root canal morphology. The endodontic treatments confirmed that the CS provided good tactile sensation during instrumentation and displayed suitable radiological behaviour.
CONCLUSIONS: This novel anatomic root canal simulator is well suited for training undergraduate and postgraduate students in endodontic procedures.