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Genç Daimi Diş Köklerinde Farklı Kanal Tedavisi Yöntemlerinin in Vitro Koşullarda Kırılma Direncine Etkisi

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Date
2015
Author
Tezel Alımcı, Bahar
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Abstract
The aim of this study is to investigate the effect of different root canal treatment methods in infected young permanent teeth after apexification with MTA to fracture resistance and the effect of MTA placed into the cervical third of the root in preventing cervical root fracture. One hundred and twelve extracted human permanent maxillary incisor teeth were used in this study. After all roots were brought to 12 mm in length, young permanent tooth simulation was done to all of them. The roots of teeth in negative control group were left empty and also without coronal filling. The control group had a 4-mm apical plug with no root filling on it but they had coronal filling. An apical plug of MTA (4-mm ) was placed and the teeth were restored according to the following groups: FRC post-cementation of fibre post into the root canal; GP/Endoplus–lateral condensation of gutta-percha with Endoplus root canal sealer; GP/AH 26-lateral condensation of gutta-percha with AH 26 root canal sealer; the root canal was filled with gutta-percha and endodontic sealer (AH 26). Subgroups have 4-mm plug of MTA in the cervical third of the root. By using universal testing machine (instron) a load was applied on the lingual surface of the cervical portion of the root of all teeth at 135° to their long axis until fractured. Data was analysed by ANOVA and Student's t tests. According to the results obtained, teeth obturated with GP/AH 26/MTA (+) were associated with the highest fracture resistance, while the negative control group had the lowest values. FRC post/MTA (-) group had the lowest values among the experimental groups. Although there was no istatistically significant difference, MTA placed in the cervical thirds of the roots showed slightly higher fracture resistance values than MTA(-) groups. It was concluded that different kinds of obturation materials alter the fracture resistance of immature roots.
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http://hdl.handle.net/11655/1081
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