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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 304 - 309 (6page)
이용수
초록· 키워드
오류제보하기
Objectives
The purpose of this study was to compare the maximum screw-in forces generated during the movement of various Nickel-Titanium (NiTi) file systems.
Materials and Methods
Forty simulated canals in resin blocks were randomly divided into 4 groups for the following instruments: Mtwo size 25/0.07 (MTW, VDW GmbH), Reciproc R25 (RPR, VDW GmbH), ProTaper Universal F2 (PTU, Dentsply Maillefer), and ProTaper Next X2 (PTN, Dentsply Maillefer, n = 10). All the artificial canals were prepared to obtain a standardized lumen by using ProTaper Universal F1. Screw-in forces were measured using a custom-made experimental device (AEndoS-k, DMJ system) during instrumentation with each NiTi file system using the designated movement. The rotation speed was set at 350 rpm with an automatic 4 mm pecking motion at a speed of 1 mm/sec. The pecking depth was increased by 1 mm for each pecking motion until the file reach the working length. Forces were recorded during file movement, and the maximum force was extracted from the data. Maximum screw-in forces were analyzed by one-way ANOVA and Tukey's post hoc comparison at a significance level of 95%.
Results
Reciproc and ProTaper Universal files generated the highest maximum screw-in forces among all the instruments while M-two and ProTaper Next showed the lowest (p < 0.05).
Conclusions
Geometrical differences rather than shaping motion and alloys may affect the screw-in force during canal instrumentation. To reduce screw-in forces, the use of NiTi files with smaller cross-sectional area for higher flexibility is recommended.
목차
등록된 정보가 없습니다.
참고문헌 (27)
참고문헌 신청
Walia HM / 1988 / An initial investigation of the bending and torsional properties of Nitinol root canal files / J Endod 14:346~351
Peters OA. / 2004 / Current challenges and concepts in the preparation of root canal systems: a review / J Endod 30:559~567
Sonntag D / 2003 / Root canal shaping with manual stainless steel files and rotary Ni-Ti files performed by students / Int Endod J 36:246~255
Kim HC / 2008 / Comparison of forces generated during root canal shaping and residual stresses of three nickel-titanium rotary files by using a three-dimensional finite-element analysis / J Endod 34:743~747
Kim TO / 2009 / Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis / Int Endod J 42:14~21
Peters OA. / 2004 / Current challenges and concepts in the preparation of root canal systems: a review / J Endod 30:559~567
Sonntag D / 2003 / Root canal shaping with manual stainless steel files and rotary Ni-Ti files performed by students / Int Endod J 36:246~255
Kim HC / 2008 / Comparison of forces generated during root canal shaping and residual stresses of three nickel-titanium rotary files by using a three-dimensional finite-element analysis / J Endod 34:743~747
Kim TO / 2009 / Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis / Int Endod J 42:14~21
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