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    Evaluation of the quality of root canal treatment performed by undergraduate dental students
    (2019) Aksoy, Fatih; Aydin, Ugur
    Aim: The aim of this study is to retrospectively evaluate the quality of root canal treatments performed by fifth year undergraduate dental students at the Department of Endodontics, Faculty of Dentistry, Gaziantep University. Material and Methods: A total sample of 584 records of patients was investigated. The technical quality of 523 root canal fillings providing criteria was evaluated according to the distance among the end of the filling and the radiographic apex, density of the filling and the quality of the obturation. All examined periapical radiographs were taken during the procedure. A root canal with acceptable quality was defined as having acceptable length and density. Results: The highest quality in maxilla and mandible was found in incisors (64% and 64.8% respectively) and the lowest quality was found in molars (44.8% and 43.5% respectively). There was a statistically significant difference between the incisors and molars in the maxillary and mandibular jaws (p <0.05). The teeth with adequate length were 72.3% and the teeth with acceptable density were 64.4%. Overall 54.3% in all evaluated teeth were found to have a root filling of an acceptable quality. Conclusion: In the radiographic evaluation of the canals treated by the students, the students performed better treatments in the anterior region compared to the molars. The quality of molar teeth was low and the total quality of the treatments was not at the desired level. Preclinical applications should be increased and more current techniques and equipment should be used in clinics to improve the total treatment quality, especially the treatment quality of molars.
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    Outcomes of nonsurgical endodontic treatment in teeth with large periapical lesion
    (2019) Aksoy, Fatih
    Aim: Present study aimed to evaluate the long-term clinical and radiographical outcomes of non-surgical root canal therapy using calcium hydroxide in anterior teeth with large periapical lesions.Material and Methods: Clinical and radiographical records of 57 mandibular and 32 maxillary anterior teeth of 74 patients were included in the study. A total of 89 anterior teeth with large periapical lesions ranging in size from 6 to 20 mm were treated endodontically with calcium hydroxide as the intracanal medicament. Teeth were evaluated in two parts as lesion diameters between 6-10 mm and 11-20 mm. All cases were followed up for 24 months and assessed in three categories as complete healing, incomplete healing or no healing (failure).Results: Complete healing was observed in 74 (83.1%), incomplete healing in 7 (7.9%) and failure in 8 (9%) teeth in all cases at the end of 24-month assessment. There was no positive correlation between the outcome of the therapy and the size of the periapical lesions (p>0.05). Conclusion: Obtained results suggested that non-surgical endodontic treatment was greatly successful in the treatment of teeth with large periapical lesions and it should be considered before surgical procedure.
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    Smear layer removal efficiency of Er,Cr;YSGG and Er:YAG lasers in root canals prepared with different NiTi File systems
    (2019) Aksoy, Fatih; Aydin, Ugur; Alacam, Tayfun
    Aim: Evaluation of the root canal dentinal wall by scanning electron microscopy (SEM) in order to verify the presence/absence of smear layer after applying different NiTi file systems and Er:YAG and Er,Cr:YSGG lasers. Material and Methods: Hundred ninety-two mandibular incisors randomly divided into four groups (n=48). Each group was prepared with one of NiTi files: ProTaper Next, One Shape, Reciproc and Twisted file Adaptive using 5.25% NaOCl irrigation. Each group was then subdivided into four groups (n=12). Er,Cr:YSGG laser, Er:YAG laser and EDTA were separately applied to the first three subgroups. In the control group, no further disinfection protocol was performed. Then the roots were sectioned longitudinally and halves were examined under SEM. Results: Erbium laser systems removed the smear layer better than NaOCl irrigation, but not as much as EDTA/NaOCl. The greatest reduction in smear was obtained with Reciproc/EDTA and Reciproc/Er,Cr:YSGG groups. The success of irrigation protocols from highest to lowest was EDTA, ErCr: YSGG laser and Er:YAG laser.Conclusions: Single file NiTi instruments appeared to be more effective than multiple-file systems in leaving clean root canal walls. The reciprocating systems produced less smear layer than rotating instruments. Er:YAG and Er,Cr:YSGG laser activations appeared to be more efficient than syringe irrigation to remove the smear layer.Keywords: Er,Cr:YSGG laser; Er:YAG laser; NiTi file; SEM; smear layer.