- 作者：Emre Nagas ; DDS ; PhD&lowast ; ; emrenagas@yahoo.com" class="auth_mail" title="E-mail the corresponding author ; M. Ozgur Uyanik ; DDS ; PhD&lowast ; ; Ayhan Eymirli ; DDS&lowast ; ; Zafer C. Cehreli ; DDS ; PhD&dagger ; ; Pekka K. Vallittu ; DDS ; PhD&Dagger ; ; Lippo V.J. Lassila ; DDS ; PhD&Dagger ; ; Veli Durmaz ; DDS ; PhD&lowast ;
- 关键词：Bond strength ; moisture condition ; root canal sealer
- 刊名：Journal of Endodontics
- 出版年：2012
- 出版时间：February 2012
- 年：2012
- 卷：38
- 期：2
- 页码：240-244
- 全文大小：636 K
Methods
Eighty root canals were prepared using rotary instruments and, thereafter, were assigned to 4 groups with respect to the moisture condition tested: (1) ethanol (dry): excess distilled water was removed with paper points followed by dehydration with 95% ethanol, (2) paper points: the canals were blot dried with paper points with the last one appearing dry, (3) moist: the canals were dried with low vacuum by using a Luer adapter for 5 seconds followed by 1 paper point for 1 second, and (4) wet: the canals remained totally flooded. The roots were further divided into 4 subgroups according to the sealer used: (1) AH Plus (Dentsply-Tulsa Dental, Tulsa, OK), (2) iRoot SP (Innovative BioCeramix Inc, Vancouver, Canada), (3) MTA Fillapex (Angelus Indústria de Produtos Odontológicos S/A, Londrina, Brasil), and (4) Epiphany (Pentron Clinical Technologies, Wallingford, CT). Five 1-mm-thick slices were obtained from each root sample (n = 25 slices/group). Bond strengths of the test materials to root canal dentin were measured using a push-out test setup at a cross-head speed of 1 mm/min. The data were analyzed statistically by two-way analysis of variance and Tukey tests at P = .05.
Results
Irrespective of the moisture conditions, iRoot SP displayed the highest bond strength to root dentin. Statistical ranking of bond strength values was as follows: iRoot SP > AH Plus > Epiphany ≥ MTA Fillapex. The sealers displayed their highest and lowest bond strengths under moist (3) and wet (4) conditions, respectively.
Conclusions
The degree of residual moisture significantly affects the adhesion of root canal sealers to radicular dentin. For the tested sealers, it may be advantageous to leave canals slightly moist before filling.