지원사업
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
- 2012.1
- 수록면
- 74 - 78 (5page)
이용수
초록· 키워드
오류제보하기
Objectives: This study aimed to evaluate the relationship between the cyclic fatigue of a K3 file and internal stress intentionally induced until the activation of the autostop function of the torque-controlled motor. Materials and Methods: K3 (Sybron Endo) .04 and .06 taper, size 25, 30, 35, 40 and 45 were used in this study. To give the internal stress, the K3 files were put into the .02 taper Endo-Training-Bloc (Dentsply Maillefer) until the activation of the auto-stop function of the torque-controlled motor.
The rotation speed was 300 rpm and torque value was 1.0 N·cm. K3 were grouped by the number of induced internal stress and randomly distributed to 4 experimental groups (n = 10, Stress 0 [control], Stress 1, Stress 2 and Stress 3). For measuring the cyclic fatigue failure, the K3 files were worked against a sloped glass block and time for file separation was recorded. Data was statistically analyzed Statistical analyses were performed using two-way ANOVA and Duncan post-hoc test at p < 0.05 level. Results:Except .04 taper size 30 in Stress 1 group, there were statistically significant differences in time for file separation between control and all experimental groups. K3 with .04 taper showed higher cyclic fatigue resistance than those of .06 taper. Conclusion:In the limitation of this study, the cyclic fatigue of the K3 file was influenced by the accumulated internal stress from use until the auto-stop function was activated by the torque-controlled motor. Therefore, clinicians should avoid the reuse of the K3 file that has undergone auto-stops.
목차
등록된 정보가 없습니다.
참고문헌 (24)
참고문헌 신청
Bahia MG / 2005 / Decrease in the fatigue resistance of nickel-titanium rotary instruments after clinical use in curved root canals / Oral Surg Oral Med Oral Pathol Oral Rad
Barbosa FO / 2008 / Fractographic analysis of K3 nickel-titanium rotary instruments submitted to different modes of mechanical loading / J Endod 34 : 994 ~ 998
Berutti E / 2004 / Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments / J Endod 30 : 228 ~ 230
Cheung GS / 2007 / Fatigue testing of a NiTi rotary instrument. Part 1: strain-life relationship / Int Endod J 40 : 612 ~ 618
Cheung GSP / 2009 / Instrument fracture: mechanisms, removal of fragments, and clinical outcomes / Endodontic Topics 16 : 1 ~ 26
Barbosa FO / 2008 / Fractographic analysis of K3 nickel-titanium rotary instruments submitted to different modes of mechanical loading / J Endod 34 : 994 ~ 998
Berutti E / 2004 / Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments / J Endod 30 : 228 ~ 230
Cheung GS / 2007 / Fatigue testing of a NiTi rotary instrument. Part 1: strain-life relationship / Int Endod J 40 : 612 ~ 618
Cheung GSP / 2009 / Instrument fracture: mechanisms, removal of fragments, and clinical outcomes / Endodontic Topics 16 : 1 ~ 26
이 논문의 저자 정보
최근 본 자료
댓글(0)
0