Morphology Changes of Apical Foramen after Root Canal Preparation with Three Different Types of Nickel Titanium Instruments.

doi:10.13701/j.cnki.kqyxyj.2017.02.016

Abstract

Abstract: Objective: To study the morphology changes of apical foramen after root canal preparation with three different types of nickel titanium instruments. Methods: Sixty freshly extracted teeth due to periodontal disease were randomized divided into 3 groups according to the surface morphology of apical foramen observed by SEM. The samples were prepared by TFA, WaveOne, and ProTaper respectively within the work length (parallel to the anatomic apical foramen). After root canal preparation, the surface morphology of apical foramen of each tooth was observed by SEM. Results: The apical foramen shift, the dentin defects, and the crackles around the apical foramen were recorded. The differences of the dentin defects in the three groups were not statistically significant, but the number of apical foramen shift and the crackles were statistically different (P＜0.05). Conclusion: TFA and WaveOne could reduce the apical foramen shift in contrast to ProTaper after root canal preparation. Prepared by TFA could reduce the crackles of the root canal and reduce the risk of root fracture.

Key words: Nickel-titanium instruments , Root canal preparation, Apical surface morphology

CLC Number:

R781.05

XIONG Meng-lin, XU Jiang, MA Yan, MA Jun-yue, GAO Wen-hui, WU Pei-lin*.. Morphology Changes of Apical Foramen after Root Canal Preparation with Three Different Types of Nickel Titanium Instruments.[J]. Journal of Oral Science Research, 2017, 33(2): 183-186.

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