이 연구의 목적은 $ProTaper^{(R)}$ system을 사용하였을 때, 각 단계별로 근관 형성 결과를 분석 하는 것이다. 20개의 레진 블락을 근관 성형 방법에 따라, 엔진 구동형 $ProTaper^{(R)}$로 전체 근관을 성형한 군을 R군, 수동형 $ProTaper^{(R)}$로 전체 근관을 성형한 군을 M군으로 하였다. 근관의 술 전, 술 후 이미지를 각 파일 단계별로 스캔한 후, 중심이동률 산출을 위해 원래의 근관 이미지와 각 단계의 파일 사용후의 이미지를 각각 중첩하였고, 근관의 변위량 산출을 위해 각 단계의 파일 사용후의 이미지와 직전 파일 사용후의 이미지를 중첩하였다. 근단공으로부터의 수직거리 1 2, 3, 4그리고 5mm위치에서 중심이동률과 근관의 변위량을 측정하였다. 실험 결과 R군의 모든지점에서 각 단계별 중심이동률과 근관 변위량은 각각 유의한 차이가 없었다 (p<0.05). M군에서 1 mm를 제외한 모든 지점에서 각 단계별 중심 이동률과 근관 변위 량은 각각 유의한 차이가 없었다 (p<0.05). 그러나 M군의 1mm 지점에서 F2 file step은 통계학적으로 큰 중심 이동률과 근관 변위량을 보였다 (p<0.05). 본 연구의 결과에서 엔진 구동형 $ProTaper^{(R)}$ 사용 시에는 각 파일 단계별 근관 변위 정도에 유의한 차이가 없었으나, 수동형 ProTaper로 근관 성형을 하였을 때 , F2 file step에서 특히 근관 변위가 크게 나타났다.
이 연구의 목적은 $ProTaper^{(R)}$ system을 사용하였을 때, 각 단계별로 근관 형성 결과를 분석 하는 것이다. 20개의 레진 블락을 근관 성형 방법에 따라, 엔진 구동형 $ProTaper^{(R)}$로 전체 근관을 성형한 군을 R군, 수동형 $ProTaper^{(R)}$로 전체 근관을 성형한 군을 M군으로 하였다. 근관의 술 전, 술 후 이미지를 각 파일 단계별로 스캔한 후, 중심이동률 산출을 위해 원래의 근관 이미지와 각 단계의 파일 사용후의 이미지를 각각 중첩하였고, 근관의 변위량 산출을 위해 각 단계의 파일 사용후의 이미지와 직전 파일 사용후의 이미지를 중첩하였다. 근단공으로부터의 수직거리 1 2, 3, 4그리고 5mm위치에서 중심이동률과 근관의 변위량을 측정하였다. 실험 결과 R군의 모든지점에서 각 단계별 중심이동률과 근관 변위량은 각각 유의한 차이가 없었다 (p<0.05). M군에서 1 mm를 제외한 모든 지점에서 각 단계별 중심 이동률과 근관 변위 량은 각각 유의한 차이가 없었다 (p<0.05). 그러나 M군의 1mm 지점에서 F2 file step은 통계학적으로 큰 중심 이동률과 근관 변위량을 보였다 (p<0.05). 본 연구의 결과에서 엔진 구동형 $ProTaper^{(R)}$ 사용 시에는 각 파일 단계별 근관 변위 정도에 유의한 차이가 없었으나, 수동형 ProTaper로 근관 성형을 하였을 때 , F2 file step에서 특히 근관 변위가 크게 나타났다.
The purpose of this study was to investigate influence of each file step of $ProTaper^{(R)}$ system on canal transportation. Twenty simulated canals were prepared with either engine-driven $ProTaper^{(R)}$ or manual $ProTaper^{(R)}$, Group R-resin blocks were instrum...
The purpose of this study was to investigate influence of each file step of $ProTaper^{(R)}$ system on canal transportation. Twenty simulated canals were prepared with either engine-driven $ProTaper^{(R)}$ or manual $ProTaper^{(R)}$, Group R-resin blocks were instrumented with rotary $ProTaper^{(R)}$ and group M-resin blocks were instrumented with manual $ProTaper^{(R)}$. Pre-operative resin blocks and post-operative resin blocks after each file step preparation were scanned. Original canal image and the image after using each file step were superimposed for calculation of centering ratio The image after using each file step alld image after using previous file step were superimposed for calculation of the amount of deviation. Measurements were taken horizontally at five different levels (1 2, 3, 4 and 5 mm) from the level of apical foramen. In rotary $ProTaper^{(R)}$ instrumentation group, centering ratio and the amount of deviation of each step at all levels were not significantly different (p>0.05). In manual $ProTaper^{(R)}$ instrumentation group, centering ratio and the amount of deviation of each step at all levels except of 1 mm were not significantly different (p>0.05). At the level of 1 mn, F2 file step had significantly large centering ratio and the amount of deviation (p<0.05). Under the condition of this study, F2 file step of manual ProTaper tended to transport the apical part of the canals than that of rotary $ProTaper^{(R)}$.
The purpose of this study was to investigate influence of each file step of $ProTaper^{(R)}$ system on canal transportation. Twenty simulated canals were prepared with either engine-driven $ProTaper^{(R)}$ or manual $ProTaper^{(R)}$, Group R-resin blocks were instrumented with rotary $ProTaper^{(R)}$ and group M-resin blocks were instrumented with manual $ProTaper^{(R)}$. Pre-operative resin blocks and post-operative resin blocks after each file step preparation were scanned. Original canal image and the image after using each file step were superimposed for calculation of centering ratio The image after using each file step alld image after using previous file step were superimposed for calculation of the amount of deviation. Measurements were taken horizontally at five different levels (1 2, 3, 4 and 5 mm) from the level of apical foramen. In rotary $ProTaper^{(R)}$ instrumentation group, centering ratio and the amount of deviation of each step at all levels were not significantly different (p>0.05). In manual $ProTaper^{(R)}$ instrumentation group, centering ratio and the amount of deviation of each step at all levels except of 1 mm were not significantly different (p>0.05). At the level of 1 mn, F2 file step had significantly large centering ratio and the amount of deviation (p<0.05). Under the condition of this study, F2 file step of manual ProTaper tended to transport the apical part of the canals than that of rotary $ProTaper^{(R)}$.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
문제 정의
The purpose of this study was to investigate that a certain file steps in the ProTaper® system influences on canal transportation mainly through analysis of root canal instrumentation step by step.
제안 방법
width (Figure 2). At this study, the amount of deviation was calculated with the superimposed images using each file step image and previous file step image; O~S1 file step, Sl-S2 file step, S2-F1 file step and F1-F2 file step.
대상 데이터
The image after using each file step and image after using previous file step were superimposed for calculation of the amount of deviation. All of these superimposed images were assessed on a 17 inch TFT-LCD monitor (Sync Master® CX701N, Samsung, Suwon, Korea) using Adobe® Photoshop software and were observed at a magnification of 156 times. Measurements were taken horizontally at five different levels (1, 2, 3, 4 and 5 mm) from the level of apical foramen (Figure 1).
available. The basic series of ProTaper® files comprise six instruments, three shaping and three finishing files. The shaping files have a pro-' ; gressive taper sequence (increasing from tip to coronal) whereas the finishing files show a decreasing taper profile.
The electric motor (Tecnika®, ATR, Pistola, Italy) set at a speed of 300 rpm and torque of 30 (Tecnika motor setting value) in a 16 ■ 1 reduction handpiece was used. Rotary ProTaper® instruments were withdrawn when resistance was felt and changed for the next instrument.
Twenty simulated root canals in clear resin blocks (Endo Training Bloc; Dentsply Maillefer, Ballaigues, Switzerland) were used for this study. The root canals had a mean canablength of 17 mm and mean curvature of 40° as determined by Schneider s method181.
데이터처리
Statistical analysis of the collected data was performed with ANOVA and Scheffe s multiple range test by SPSS™ version 10.0 (SPSS Inc., Chicago, IL, USA). Differences revealed in the data were designated as significant at p < 0.
참고문헌 (28)
European Society of Endodontology. Consensus report of the European Society of Endodontology on quality guidelines for endodontic treatment. Int Endod J 27:115-124, 1994
Schafer E, Tepal J, Hoppe W. Properties of endodontic hand instruments used in rotary motion. Part 2. Instrumentation of curved canals. J Endod 21:493-497, 1995
Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod 14:346-351, 1988
Glosson CR, Hallor RH, Dove SB, del Rio CE. A comparison of root canal preparations using Ni-Ti hand, Ni-Ti engine driven and K-Flex endodontic instruments. J Endod 21:146-151, 1995
Hata G, Demura M, Kato AS, Imura N, Novo NF, Toda T. A comparison of shaping ability using ProFile, GT file, and Flex-R endodontic instruments in simulated canals. J Endod 28(4):316-321, 2002
Peters OA, Peters CI, Schoneberger K, Barbakov F. ProTaper rotary root canal preparation : effect of canal anatomy on final shape analyzed by micro CT. Int Endod J 36:86-92, 2003
CH Lee, KM Cho, CU Hong. Effect of various canal preparation techniques using rotary Nickel-Titanium files on the maintenance of canal curvature. J Kor Acad Cons Dent 28(1):41-49, 2003
Bergmans L, Van Cleynenbreugel J, Beullens M, Wevers M, Van Meerbeek B, Lambrechs P. Progressive versus constant tapered shaft design using NiTi rotary instruments. Int Endod J 36:288-295, 2003
Michael Szasz GDP. ProTaper for hand use-The Experience of a GDP. Dentsply united kingdom - articles (http://www.dentsply.co.uk)
Julien Webber. Hand ProTaper-Shaping the Future. Dentsply united kingdom - articles (http://www.dentsply.co.uk)
Berutti E, Chiandussi G, Bavaglio I, Ibba A. Comparative analysis of torsional and bending stresses in two mathematical models of nickel-titanium rotary instruments: ProTaper versus ProFile. J Endod 29(1):15-19, 2003
Calberson FL, Deroose CA, Hommez GM, De Moor RJ. Shping ability of ProTaper nickel-titanium files in simulated resin root canals. Int Endod J 37:613-623, 2004
Iqbal MK, Firic S, Tulcan J, Karabucak B, Kim S. Comparison of apical transportation between ProFile and ProTaper NiTi rotary instruments. Int Endod J 37:359-364, 2004
Yoshimine Y, Ono M, Akamine A. The shaping effects of three nickel-titanium rotary instruments in simulated s-shaped canals. J Endod 31(5):373-375, 2005
Schafer E, Vlassis M. Comparative investigation of two rotary nickel-titanium instruments: ProTaper versus RaCe. Part 1. Shaping ability in simulated curved canals. Int Endod J 37:229-238, 2004
Yun H, Kim SK. A comparison of the shaping abilities of 4 nickel-titanium rotary instruments in simulated root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 95:228-233, 2003
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.