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    3D Analysis of D-RaCe and Self-Adjusting File in Removing Filling Materials from Curved Root Canals Instrumented and Filled with Different Techniques
    (Hindawi Publishing Corp, 2014) Simsek, Neslihan; Ahmetoglu, Fuat; Keles, Ali; Bulut, Elcin Tekin; Er, Kursat
    The aim of this study was to compare the efficacy of D-RaCe files and a self-adjusting file (SAF) system in removing filling material from curved root canals instrumented and filled with different techniques by using microcomputed tomography (micro-CT). The mesial roots of 20 extracted mandibular first molars were used. Root canals (mesiobuccal and mesiolingual) were instrumented with SAF or Revo-S. The canals were then filled with gutta-percha and AH Plus sealer using cold lateral compaction or thermoplasticized injectable techniques. The root fillings were first removed with D-RaCe (Step 1), followed by Step 2, in which a SAF system was used to remove the residual fillings in all groups. Micro-CT scans were used to measure the volume of residual filling after root canal filling, reinstrumentation with D-RaCe (Step 1), and reinstrumentation with SAF (Step 2). Data were analyzed using Wilcoxon and Kruskal-Wallis tests. There were no statistically significant differences between filling techniques in the canals instrumented with SAF (P = 0.292) and Revo-S (P = 0.306). The amount of remaining filling material was similar in all groups (P = 0.363); all of the instrumentation techniques left filling residue inside the canals. However, the additional use of SAF was more effective than using D-RaCe alone.
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    Knowledge and clinical experiences of pediatric dentists and endodontists regarding regenerative endodontic procedures
    (Bayrakol Medical Publisher, 2022) Demir, Pinar; Demircan, Beril; Bulut, Elcin Tekin; Simsek, Neslihan
    Aim: Pediatric dentists and endodontists perform regenerative endodontic procedures (REPs) on immature permanent teeth with necrotic pulp. The aim of this survey was to gather information about the knowledge and clinical experiences of pediatric dentists and endodontists regarding REPs. Material and Methods: A 23-question survey was formed and a participation link was sent via e-mail. The questions were prepared based on AAE guide. The survey consisted of various types of questions to obtain information about the physicians' age, gender, education information, previous regenerative endodontic therapy (RET) experiences and preferred REPs clinical protocols. Results: A total of 207 volunteers, 101 pediatric dentists and 106 endodontists participated in the study. RET was chosen by 68.1% of participants as their first choice in incisors, 50.2% in premolars and 40% in molars. The most important criterion is the stage of root development (44.8%) to decide between RET or apexification; 53.5% of the participants learned about REPs during residency training; 70.5% of the participants had applied REPs before (pediatric dentists (77.2%), endodontics (64.1%)). Most of the physicians stated that a candidate suitable for RET in the future would encourage them to practice. Discussion: The majority of pediatric dentists and endodontists do not adequately follow published standard clinical protocols. However, conducting studies under standard conditions is very important in evaluating the results of clinical protocols. This is very thought-provoking that even specialist physicians who can treat patients in this regard are confused. Therefore, physicians should be informed about this issue and a common protocol should be adopted in treatments.