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Now showing 1 - 3 of 3
  • Publication
    Effect of Trichloroacetic Acid on the Bond Strength of Calcium Silicate-Based Cements: A Modified Push-Out Test
    (2021-10-01T00:00:00Z) Alim, Betül Aycan; Sarıalioğlu Güngör, Ayça; UYSAL, BETÜL AYCAN; SARIALİOĞLU GÜNGÖR, AYÇA
    Objective: This study aimed to investigate the effect of trichloroacetic acid (TCA) on the bond strength of calcium silicate-based cements to dentin. Methods: Ten single-rooted bovine teeth were sectioned longitudinally into slices 2 mm thick. Six holes were drilled with a 1.2 mm diamond bur in each dentin slice (totally 60 holes). Cotton pellets with TCA were applied to three holes of each slice for 1 min, whereas no acid was applied to the other three. The TCA and non-TCA groups were divided into three subgroups according to the material used: ProRoot mineral trioxide aggregate [(MTA); n=10], Harvard MTA (n=10), and Biodentine (n=10). After seven days, the dislodgement resistance of the materials was calculated using a universal resting machine The types of bond failure were examined under a stereomicroscope. Results: The TCA had no statistically significant effect on the bonding strength of the tested materials (p>0.05). The Harvard MTA subgroup had the lowest mean bond strength values (2.25 +/- 0.79 MPa), while the Biodentine subgroup had the highest (10.49 +/- 3.32MPa). The most common bond failure types were mixed in the ProRoot MTA subgroup (60%) and cohesive in the Harvard MTA (60%) and Biodentine (70%) subgroups. Conclusion: The bond strength of Biodentine is greater than those of ProRoot and Harvard MTA. TCA does not affect the push-out bond strength of MTA or Biodentine.
  • Publication
    Evaluation of Different Root Canal Filling Techniques in Severely Curved Canals by Micro-computed Tomography
    (2019-09-01) Alim, Betül Aycan; Garıp Berker, Yıldız; UYSAL, BETÜL AYCAN
    AimTo fill the severely curved root canals with different filling techniques and to compare these techniques using micro-computed tomography (micro-CT).Materials and methodsSixty extracted mandibular first molars (degree of root canal curvature > 25°) were selected. All samples were divided into four groups and filled with one of the following techniques: lateral condensation, single-cone, continuous-wave obturation, and core carrier. After they were scanned by micro-CT, the total area, filled area and void area of the root canal were calculated. The Mann–Whitney U and Kruskal–Wallis tests were used for statistical analysis (p<0.05).ResultsIt was shown that significantly more filling material was used in the lateral condensation and core carrier technique groups at 2 and 5 mm than in the single-cone and continuous-wave obturation technique groups (p<0.05). It was observed no statistically significant difference at 8 mm (p > 0.05).ConclusionNo technique could completely fill in root canal. Regarding the coronal part, all techniques can be used for more effective filling as long as a good condensation is achieved. The use of a plugger with an optimal size according to the localisation of root canal curvature and the choice of a heat-resistant root canal sealer affects the success of the treatment in the thermoplastic techniques.
  • Publication
    Does the Endodontic Education Level Affect Decision-Making for Endodontically Treated Teeth With Apical Periodontitis? A Web-Based Survey
    (2021-02-01T00:00:00Z) Alim-Uysal, Betül Aycan; Dinçer, Asiye Nur; Yurtgezen, Berkan; UYSAL, BETÜL AYCAN; DİNÇER, ASİYE NUR; GÜNEŞER, MEHMET BURAK
    Objectives: The management of endodontically treated teeth with apical periodontitis is debated among clinicians. The aim of this study was to evaluate treatment choices for endodontically treated teeth with different sizes of periapical lesions among endodontists, endodontics postgraduate students, general dental practitioners, and undergraduate students who had fulfilled their theoretical and clinical training in endodontics. Materials and methods: Periapical lesion images (no periapical lesion and 1-mm, 3-mm, and 5-mm periapical lesions) were formed on 4 different radiographs with a software program, and the survey included 16 radiographs that were emailed to 1881 participants. Treatment options included extraction, surgical or nonsurgical retreatment, and wait and see. The χ2 test was used to compare the responses of the participants. Results: The survey was returned by 1039 participants (55.23%). There were statistically significant differences among the responses of all participants for all cases (P < .05), except a case with a broken file and no lesion (P = .918). All participants decided to extract at an increased size from a 1-mm periapical lesion to a 5-mm periapical lesion. At all lesion sizes, general dental practitioners planned retreatment less when compared with other groups. Conclusions: This survey study showed that there was a positive correlation between endodontic education level and retreatment decision-making. Dentists who confront seemingly hopeless endodontically treated teeth such as an instrument fracture, a missing canal, or a large periapical lesion should consult with an endodontist before making the decision to extract the tooth.