Background Successful endodontic treatment requires a significant knowledge of root canal anatomy. The aim of this study was to evaluate the root and root canal number of permanent teeth among the Moscow population using cone-beam computed tomography (CBCT) scanning. Materials and methods 300 CBCT images of subjects were analyzed to study the anatomy of roots and root canal system of each tooth. The collected data were analyzed using IBM SPSS statistics software 22.0 version. Results The maxillary incisors and canines had one root with one canal in 100%. Maxillary premolars had one root with one or two canals and two roots with two canals, while mandibular premolars were single-rooted with one or two canals. Maxillary first and second molar had three separated roots, and the prevalence of four canals was more often in first molars. Mandibular molars had two roots with different number of canals. Conclusion The root canal system varies greatly among populations and even in different individuals within the same population; thus, using CBCT scanning is an effective technique in investigating the root canal system.
Background:The success of endodontic treatment depends on the knowledge of root canal system. The root canals have complex morphology and wide individual variations. The aim of this study was to evaluate the root canal morphology of the maxillary first molars among residents of the Moscow region using cone-beam computed tomography (CBCT) scanning.Materials and Methods:Three hundred CBCT images of patients aged 20–70 years old were analyzed to study the root canal system (the number of canals and the configuration according to Vertucci's classification) of the maxillary first molars. The prevalence of a second mesiobuccal (MB2) in the mesiobuccal root (MB) was recorded in each age group.Results:three separated roots of the maxillary first molar were observed in 100% of cases. MB2 canals were found in 59.8% of cases. A second distobuccal canal was observed in 0.5% of cases. The canal morphology in the MB root was 40.2% in Type I, 22.4% in Type II, and 37.3% in Type IV.Conclusion:The prevalence of MB2 canals was 59.8%, and the most common canal morphology was Vertucci's Type I. Using CBCT scanning is a useful technique to evaluate and analyze the root canal system.
The success of endodontic treatment depends on many factors. The most important of them are the knowledge and manual skills of the dentist.Materials and methods. We analyzed the condition of teeth after endodontic treatment in 300 patients aged 20 to 70 years. Were studied 300 images of CBCT, the number of treated teeth and the number of cases of unsuccessful endodontic treatment was analyzed.Results. According to CBCT data, high-quality obturation of the root canal system was observed in 1335 (75%) endodontically treated teeth. The reasons for successful endodontic treatment are under-sealing of the root canal (16%), removal of material beyond the apex (5.6%), and missed root canals (3.4%).Conclusion. Clinical dental patient examination revealed that maxillary and mandibular molars most often undergo endodontic treatment.
The main criterion for effective treatment in dental practice is the adhesive strength of materials. In our days high-quality fixation of materials achieved by the evolution of adhesive systems. Despite the fact that adhesive systems are developing rapidly each generation has a number of advantages and disadvantages that need to be worked on. The issue of optimizing adhesive systems is not completely understood and requires further study and improvement.Aim. The assessment of composite material adhesion strength with tooth hard tissues depending on the adhesive protocol used.Materials and methods. In preparation for the experimental study the teeth were randomly divided into 2 equal groups according to the number of adhesive protocols used. Group 1 samples were processed according to protocol 1 using a moisturizing agent. The samples of group 2 were processed according to protocol 2 using an antiseptic liquid. A sample of the adhesive compound «composite material – tooth» was placed in distilled water and kept in a thermostat at a temperature of (37,0±1,0) Celsius for 24 hours. Tests of the adhesive shear strength of prepared samples were carried out on the testing machine «SYNTHEZ 5».Conclusion. Preparation of the tooth hard tissues surface before restoration using various adhesive protocols is essential and affects the quality as well as the long-term of restoration. The introduction of a moisturizing or antiseptic liquid into the adhesive protocol increases the strength of adhesion.
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