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
- 2009.7
- 수록면
- 444 - 454 (11page)
이용수
초록· 키워드
오류제보하기
The purpose of this study was to compare the shaping abilities of LightSpeed, ProTaper-Universal, and hybrid technique using S-series of ProTaper-Universal and LigthSpeed.
The 72 simulated root canals of J-shape were used and classified as flowing 3 groups according to the instrumentation methods; Group P of 24 canal blocks were prepared with ProTaper-Universal, Group L was prepared with LightSpeed, and Group H was prepared with hybrid technique (initial shaping with ProTaper-Universal SI and S2 and apical shaping with LightSpeed from #25 to #50). A second-year resident of Endodontic department prepared the resin block canals to apical size #50 (F5 in Group P).
The time lapses for instrumentation and the reduction of root canal curvature after shaping were measured. The pre- and post-instrumented root canals were scanned and superimposed to evaluate and calculate the increased canal width and apical centering ratio. The results were as followings:
Group L and H showed significant less instrumentation time than Group P (p < 0.05), The ProTaper system showed greater reduction of root canal curvature and working length diminishment than other methods (p < 0,05). LightSpeed system showed best canal curvature preserving characteristics. The Group P had greater instrumented widths at all levels examined (p < 0.05). Group L and Group H showed lower centering ratio (ability to preserve the canal center; the lower ratio means the better canal center preservation) than Group P (p < 0.05). Group H had the lowest centering ratio at the 1 mm level.
The 72 simulated root canals of J-shape were used and classified as flowing 3 groups according to the instrumentation methods; Group P of 24 canal blocks were prepared with ProTaper-Universal, Group L was prepared with LightSpeed, and Group H was prepared with hybrid technique (initial shaping with ProTaper-Universal SI and S2 and apical shaping with LightSpeed from #25 to #50). A second-year resident of Endodontic department prepared the resin block canals to apical size #50 (F5 in Group P).
The time lapses for instrumentation and the reduction of root canal curvature after shaping were measured. The pre- and post-instrumented root canals were scanned and superimposed to evaluate and calculate the increased canal width and apical centering ratio. The results were as followings:
Group L and H showed significant less instrumentation time than Group P (p < 0.05), The ProTaper system showed greater reduction of root canal curvature and working length diminishment than other methods (p < 0,05). LightSpeed system showed best canal curvature preserving characteristics. The Group P had greater instrumented widths at all levels examined (p < 0.05). Group L and Group H showed lower centering ratio (ability to preserve the canal center; the lower ratio means the better canal center preservation) than Group P (p < 0.05). Group H had the lowest centering ratio at the 1 mm level.
목차
ABSTRACT
서론
연구 재료 및 방법
연구 결과
총괄 및 고찰
결론
참고문헌
참고문헌 (47)
참고문헌 신청
1. [단행본] - Ruddle C.J. / 2002 / Cleaning and shaping root canal systems. in : Pathways of the pulp / CV Mosby : 231 ~ 291
2. [학술지(정기간행물)] - Walia H.M. / 1988 / An initial investigation of the bending and torsional properties of Nitinol root canal files / J Endod 14 : 346 ~ 351
3. [학술지(정기간행물)] - Schäfer E. / 2004 / Comparison of hand stainless steel and nickel titanium rotary instrumentation: a clinical study / J Endod 30 : 432 ~ 435
4. [학술지(정기간행물)] - Chen J.L. / 2002 / A comparison of stainless steel hand and rotary nickel-titanium instrumentation using a silicone impression technique / Aust Dent J 47 : 12 ~ 20
5. [학술지(정기간행물)] - Garip Y. / 2001 / The use of computed tomography when comparing nickel-titanium and stainless steel files during preparation of simulated curved canals / Int Endod J 34 : 452 ~ 457
2. [학술지(정기간행물)] - Walia H.M. / 1988 / An initial investigation of the bending and torsional properties of Nitinol root canal files / J Endod 14 : 346 ~ 351
3. [학술지(정기간행물)] - Schäfer E. / 2004 / Comparison of hand stainless steel and nickel titanium rotary instrumentation: a clinical study / J Endod 30 : 432 ~ 435
4. [학술지(정기간행물)] - Chen J.L. / 2002 / A comparison of stainless steel hand and rotary nickel-titanium instrumentation using a silicone impression technique / Aust Dent J 47 : 12 ~ 20
5. [학술지(정기간행물)] - Garip Y. / 2001 / The use of computed tomography when comparing nickel-titanium and stainless steel files during preparation of simulated curved canals / Int Endod J 34 : 452 ~ 457
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UCI(KEPA) : I410-ECN-0101-2013-515-003536360