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Correlation between tug-back and cone fitness in curved root canals prepared with reciprocating files
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 이우철 | - |
dc.contributor.author | 윤희영 | - |
dc.date.accessioned | 2017-07-14T05:42:22Z | - |
dc.date.available | 2017-07-14T05:42:22Z | - |
dc.date.issued | 2015-02 | - |
dc.identifier.other | 000000025150 | - |
dc.identifier.uri | https://hdl.handle.net/10371/125063 | - |
dc.description | 학위논문 (박사)-- 서울대학교 대학원 : 치의과학과, 2015. 2. 이우철. | - |
dc.description.abstract | Objectives.
The purpose of this study was to compare the gutta-percha-occupied area (GPOA) of two gutta-percha cones with different size and taper using micro-computed tomographic (micro-CT) imaging and to evaluate the relationship between GPOA and tug-back in curved root canals instrumented with reciprocating files. Methods. Twenty curved roots from extracted human maxillary and mandibular molars were divided into two groups. In group R (n = 10), root canals were prepared with Reciproc R25 files (VDW, Munich, Germany) and in group W (n = 10), root canals were prepared using WaveOne Primary files (Dentsply Maillefer, Ballaigues, Switzerland). The presence or absence of tug-back was decided for both of #25/.08 and #30/.06 gutta-percha cones in every root canal. Micro-CT imaging was used to analyze cone fitness by calculating the percentage of GPOA at 1-, 2-, and 3-mm levels from the working length. The correlation between the sum of the GPOA from all three levels and the presence of tug-back was also investigated. The data were analyzed statistically. The level of significance was set at 5%. Results. Tug-back was present in 45% and 100% root canals for #25/.08 and #30/.06 cones, respectively, with a significant difference (P < .05). At the 2- and 3-mm levels, #30/.06 cones produced significantly higher GPOA in both group R and W (P < .05). The sum of the GPOA score was significantly higher in the samples with tug-back than in those without tug-back (88.12% ± 12.17% vs. 75.35% ± 13.42% | - |
dc.description.abstract | P < .05) | - |
dc.description.abstract | however, there was no significant difference between the two cone types for this correlation (P > .05).
Conclusion. Under the conditions of this study, tug-back can be a definitive determinant for indicating higher cone fitness in the curved root canal prepared with reciprocating files regardless of the cone type. | - |
dc.description.tableofcontents | 1. Introduction ….…………………………………………………… 1
2. Materials and Methods …………………………………………… 5 3. Results ………………………………………………………….… 9 4. Discussion ………………………………………………………. 11 5. References ………………………………………………….…… 16 Tables and Figures …………………………………………..…… 21 국문 초록 ………………………………………………..……..… 32 | - |
dc.format | application/pdf | - |
dc.format.extent | 2225191 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | cone fitness | - |
dc.subject | gutta-percha occupying area | - |
dc.subject | micro-computed tomography | - |
dc.subject | reciprocating file | - |
dc.subject | tug-back | - |
dc.subject.ddc | 617 | - |
dc.title | Correlation between tug-back and cone fitness in curved root canals prepared with reciprocating files | - |
dc.type | Thesis | - |
dc.description.degree | Doctor | - |
dc.citation.pages | 34 | - |
dc.contributor.affiliation | 치의학대학원 치의과학과 | - |
dc.date.awarded | 2015-02 | - |
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