Ginjeira, António Manuel Pinto, 1958-Basso, Ivana Gradicek Fraústo2017-01-242017-01-2420162016http://hdl.handle.net/10451/26151Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016INTRODUCTION: The major goals of endodontic treatment is to preserve the functinal teeth, by removing from the root canal system; obturate the cleaned and shaped system; and prevent future recontamination of sealed root canals. AIMS: The purpose of this study is to compare 3D measures between three different systems; manual instrumentation with K-Filesand two rotary files: ProTaper GoldTM and WaveOne GoldTM, in naturale root canals. MATERIALS AND METHODS: Thirty three extracted first maxillary permanent teeth were selected for this study. Three groups were created, 11 in each one, and it was selected randomly and blind. Then each was prepared by one of selected systems: Group 1=K-files; Group 2=WaveOne Gold TM; Group 3=ProTaper GoldTM. In collaboration with CDRsp IP Leiria, it was used X-ray micro-CT. RESULTS: The increase in volume after preparation with ProTaper GoldTM file was significantly higher than the increase after preparation with K-files (p = 0.024). There was no statistically significant difference between WaveOne GoldTM and ProTaper GoldTM or between WaveOne GoldTM and K-files. The increase in diameter after preparation with WaveOne GoldTM file, and ProTaper GoldTM also, was significantly higher than the increase in diameter after preparation with K-files (p = 0.014, p = 0.013, respectively). DISCUSSION AND CONCLUSION: Possibly that WaveOne GoldTM represents a mid way system, not statistically significant, however possible not so intrusive and not so unobtrusive like other two systems. There was significantly increased diameter after preparation with WaveOne GoldTM and ProTaper GoldTM file compared with the increase in diameter after preparation with K-files, and its seems that two Gold files have almost the same result. This significant increase of diameter, in these two rotatory files, is one of an indisputable characteristic for irrigation mission to success, as well as endodontic treatment.engMateriais dentáriosTeses de mestrado - 2016master thesis201324024