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In vitro evaluation of efficacy of different rotary instrument systems for gutta percha removal during root canal retreatment

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In vitro evaluation of efficacy of different rotary instrument systems for gutta percha removal during root canal retreatment

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dc.contributor.author Joseph, Mercy es
dc.contributor.author Ahlawat, Jyoti es
dc.contributor.author Malhotra, Amit es
dc.contributor.author Rao, Murali es
dc.contributor.author Sharma, Abhimanyu es
dc.contributor.author Talwar, Sangeeta es
dc.date.accessioned 2017-03-06T08:29:48Z
dc.date.available 2017-03-06T08:29:48Z
dc.date.issued 2016 es
dc.identifier.citation Joseph, Mercy ; Ahlawat, Jyoti ; Malhotra, Amit ; Rao, Murali ; Sharma, Abhimanyu ; Talwar, Sangeeta. In vitro evaluation of efficacy of different rotary instrument systems for gutta percha removal during root canal retreatment. En: Journal of Clinical and Experimental Dentistry. 2016. Vol. 8, no. 4: 355 es
dc.identifier.uri http://hdl.handle.net/10550/57524
dc.description.abstract Background: Complete removal of old filling material during root canal retreatment is fundamental for predictable cleaning and shaping of canal anatomy. Most of the retreatment methods tested in earlier studies have shown inability to achieve complete removal of root canal filling. Therefore the aim of this investigation was to assess the efficacy of three different rotary nickel titanium retreatment systems and Hedstrom files in removing filling material from root canals. Material and Methods: Sixty extracted mandibular premolars were decoronated to leave 15 mm root. Specimen were hand instrumented and obturated using gutta percha and AH plus root canal sealer. After storage period of two weeks, roots were retreated with three (Protaper retreatment files, Mtwo retreatment files, NRT GPR) rotary retreatment instrument systems and Hedstroem files. Subsequently, samples were sectioned longitudinally and examined under stereomicroscope. Digital images were recorded and evaluated using Digital Image Analysing Software. The retreatment time was recorded for each tooth using a stopwatch. The area of canal and the residual filling material was recorded in mm 2 and the percentage of remaining filling material on canal walls was calculated. Data was analysed using ANOVA test. Results: Significantly less amount of residual filling material was present in protaper and Mtwo instrumented teeth ( p < 0.05) compared to NRT GPR and Hedstrom files group. Protaper instruments also required lesser time during removal of filling material followed by Mtwo instruments, NRT GPR files and Hedstrom files. Conclusions: None of the instruments were able to remove the filling material completely from root canal. Protaper universal retreatment system and Mtwo retreatment files were more efficient and faster compared to NRT GPR fles and Hedstrom files. en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title In vitro evaluation of efficacy of different rotary instrument systems for gutta percha removal during root canal retreatment es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÃ DICAS es
dc.type.hasVersion VoR es_ES

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