Effectiveness of rotary or manual techniques for removing a 6-year-old filling material

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDuarte, Marco Antônio Hungaro
dc.creatorSó, Marcus Vinícius Reis
dc.creatorCimadon, Vanessa Buffon
dc.creatorZucatto, Cristiane
dc.creatorVier-Pelisser, Fabiana Vieira
dc.creatorKuga, Milton Carlos
dc.date2014-05-27T11:24:46Z
dc.date2016-10-25T18:28:59Z
dc.date2014-05-27T11:24:46Z
dc.date2016-10-25T18:28:59Z
dc.date2010-08-20
dc.date.accessioned2017-04-06T01:42:31Z
dc.date.available2017-04-06T01:42:31Z
dc.identifierBrazilian Dental Journal, v. 21, n. 2, p. 148-152, 2010.
dc.identifier0103-6440
dc.identifier1806-4760
dc.identifierhttp://hdl.handle.net/11449/71824
dc.identifierhttp://acervodigital.unesp.br/handle/11449/71824
dc.identifier10.1590/S0103-64402010000200010
dc.identifierS0103-64402010000200010
dc.identifier2-s2.0-77955614386.pdf
dc.identifier2-s2.0-77955614386
dc.identifierhttp://dx.doi.org/10.1590/S0103-64402010000200010
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/892756
dc.descriptionThe aim of this study was to evaluate the effectiveness of manual and rotary instrumentation techniques for removing root fillings after different storage times. Twenty-four canals from palatal roots of human maxillary molars were instrumented and filled with gutta-percha and zinc-oxide eugenol-based sealer (Endofill), and were stored in saline for 6 years. Non-aged control specimens were treated in the same manner and stored for 1 week. All canals were retreated using hand files or ProTaper Universal NiTi rotary system. Radiographs were taken to determine the amount of remaining material in the canals. The roots were vertically split, the halves were examined with a clinical microscope and the obtained images were digitized. The images were evaluated with AutoCAD software and the percentage of residual material was calculated. Data were analyzed with two-way ANOVA and Tukey's test at 5% significance level. There was no statistically significant differences (p>0.05) between the manual and rotary techniques for filling material removal regardless the ageing effect on endodontic sealers. When only the age of the filling material was analyzed microscopically, non-aged fillings that remained on the middle third of the canals presented a higher percentage of material remaining (p<0.05) compared to the aged sealers and to the other thirds of the roots. The apical third showed a higher percentage of residual filling material in both radiographic and microscopic analysis when compared to the other root thirds. In conclusion, all canals presented residual filling material after endodontic retreatment procedures. Microscopic analysis was more effective than radiographs for detection of residual filling material.
dc.languageeng
dc.relationBrazilian Dental Journal
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectEndodontics
dc.subjectGutta-percha
dc.subjectRetreatment
dc.subjectroot canal filling material
dc.subjectanalysis of variance
dc.subjectcomparative study
dc.subjectdental debonding
dc.subjectdental equipment
dc.subjectdevice removal
dc.subjectendodontics
dc.subjectequipment design
dc.subjecthistology
dc.subjecthuman
dc.subjectinstrumentation
dc.subjectmaxilla
dc.subjectmethodology
dc.subjectmolar tooth
dc.subjectnonparametric test
dc.subjectradiography
dc.subjectretreatment
dc.subjecttime
dc.subjecttooth pulp
dc.subjectAnalysis of Variance
dc.subjectDental Debonding
dc.subjectDental Equipment
dc.subjectDental Pulp Cavity
dc.subjectDevice Removal
dc.subjectEquipment Design
dc.subjectHumans
dc.subjectMaxilla
dc.subjectMolar
dc.subjectRoot Canal Filling Materials
dc.subjectRoot Canal Preparation
dc.subjectStatistics, Nonparametric
dc.subjectTime Factors
dc.titleEffectiveness of rotary or manual techniques for removing a 6-year-old filling material
dc.typeOtro


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