Evaluation of two different root-end cavity preparation techniques: A scanning electron microscope study

ABSTRACT Objective: In this study, we aimed to evaluate and compare the dentinal walls of root-end cavities for the presence of cracks after cavity preparation using US retrotips and Er: YAG laser. Materials and Methods: Fifty single-rooted teeth were prepared by Protaper NiTi rotary system and obturated by lateral condensation. Three milimeters of root-end was resected. Twenty teeth were prepared with US retrotip (Group 1), 20 teeth with Er: YAG laser (Group 2), and 10 teeth without retropreparation (control group). The root-end surfaces were examined under a scanning electron microscope (SEM). Then the cracks of the resected root surfaces were evaluated on microphotographs. Results: No statistically significant difference was detected between US Group and Laser Group for complete, incomplete, intradentinal, and total number of cracks (P = 0.47, P = 0.80, P = 0.69, P = 0.869, respectively). Conclusion: Statistical analysis revealed no significant effect of retropreparation technique on the development of apical cracks (P > 0.05).

Download Full-text

Removal of Debris and Smear Layer in Curved Root Canals Using Self-Adjusting File with Different Operation Times – A Scanning Electron Microscope Study

International Dental Research ◽

10.5577/intdentres.2011.vol1.no1.1 ◽

2011 ◽

Vol 1 (1) ◽

pp. 1 ◽

Cited By ~ 6

Author(s):

Senem YİĞİT ÖZER ◽

Özkan ADIGÜZEL ◽

Sadullah KAYA

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Microscope Study ◽

Electron Microscope Study ◽

Smear Layer ◽

Scanning Electron Microscope Study ◽

Root Canals ◽

Significant Difference ◽

Curved Root Canals ◽

Scanning Electron

Aim: Debridement during root canal treatment is mandatory and it is provided by means of chemomechanical instrumentation and irrigation methods. This article analysis the debridement capacity of a novel system, SAF and its special irrigation device when used with different operation times in curved root canals. Methodology: 30 mesiobuccal root canals of maxillary molars were instrumented using SAF. Teeth were divided into three groups. In Group 1, 10 new SAF files were used for operation for 4 minutes. In Group 2, the 4-min previously used SAF files were operated in the same manner. In Group 3, the 8-min previously used SAF files were operated. During SAF operation 2.6 % NaOCl and 17 % EDTA were used alternately in all groups. Debris and smear layer removal were evaluated for the apical thirds under scanning electron microscope. Results: Non-used, 4-min preused, and 8-min preused SAF efficiently removed debris and smear layer in the apical thirds. There were no significant difference among the groups in terms of debridement. Conclusions: When SAF is operated in curved root canals with continous flow of irrigation it results in debris and smear-free canal walls in the critical apical thirds within 12 minutes. How to cite this article: Yiğit Özer S, Adıgüzel Ö, Kaya S. Removal of debris and smear layer in curved root canals using self-adjusting file with different operation times - A scanning electron microscope study. Int Dent Res 2011;1:1-6. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Download Full-text