Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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A COMPARATIVE STUDY ON THE CANAL CONFIGURATION AFTER SHAPING BY PROFILE, PROTAPERTM AND K-FLEXOFILE IN SIMULATED CANALS WITH DIFFERENT ANGLES OF CURVATURE

ProFile, ProTaperTM K-Flexofile 근관 성형시 근관의 만곡도에 따른 근관 형태 변화 비교연구

  • Lee, Bo-Kum (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University) ;
  • Kim, Dong-Jun (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University) ;
  • Hwang, Yun-Chan (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University) ;
  • Hwang, In-Nam (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University) ;
  • Oh, Won-Mann (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
  • 이보금 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 김동준 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 황윤찬 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 황인남 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 오원만 (전남대학교 치과대학 치과보존학교실 치의학 연구소)
  • Published : 2005.07.01
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Abstract

The purpose of this study was to evaluate the canal configuration after shaping by ProFile. ProTaper and K-Flexofile in simulated resin canals with different angles of curvature. Three types of instruments were used: ProFile. ProTaper. K-Flexofile. Simulated root canals. which were made of epoxy resin. were prepared by ProFile. ProTaper with rotary instrument using a crown-down pressureless technique. and hand instrumentation was performed by K-Flexofile using a step-back technique. All simulated. canals were prepared up to size 25 file at end-point of preparation. Pre and post instrumentation images were recorded with Scanner. Assessment of canal shape was completed with Image Analysis program. Measurements were made at 1. 2. 3. 4. 5. 6. 7. 8. 9 and 10mm from the apex. At each level. outer canal width. inner canal width. total canal width. and amount of transportation from original axis were recorded. Instrument deformation and fracture were recorded. Data were analyzed by means of one-way ANOVA analysis of variance and the Sheffe's test. The result was that ProFile and ProTaper maintain original canal shape regardless of the increase of angle of curvature than K-Flexofile. ProFile show significantly less canal transportation and maintained original canal shape better than ProTaper.

본 연구는 ProFile, ProTaper 및 K-Flexofile로 근관 성형시 근관의 만곡도에 따라 근관의 형태가 어떻게 변화하는지를 비교 분석하고자 시행되었다. ISO #15 finger spreader를 15도, 30도 및 45도로 만곡시키고 에폭시 레진으로 각각도의 근관을 갖는 30개의 근관 모형을 제작하였다. 근관의 길이는 18mm로 하였고 근관의 만곡은 근관의 입구로부터 10mm 부위에서 시작하도록 제작하였다. 근관 성형에는 엔진 구동형 니켈-타이타늄 파일인 ProFile과 ProTaper, 수동형 stainless steel 파일인 K-Flexofile을 사용하였다. ProFile과 ProTaper는 제조자의 지시에 따라 크라운다운법으로 근관 성형하였고, K-Flexofile은 스텝백법으로 근관 성형하였다. 근첨부 성형은 #25파일 크기까지 시행하였다. 근관 성형 전 후 이미지를 스캐너를 이용하여 얻고 Photoshop 7.0프로그램을 이용하여 중첩하였다. 이미지 분석 프로그램을 이용하여 치근단 쪽에서부터 1, 2, 3, 4, 5, 6, 7, 8, 9및 10mm부위의 내 외측 폭경 변화와 총폭경 및 근관의 중심축에 대한 근관 변위을 측정하였다. 각 부위에서 내 외측 폭경과 총폭경 및 근관 변위의 유의성 검정을 위해 one-way ANOVA분석을 시행하였으며 각 기구간의 유의성 검정은 Scheffe's test로 사후 분석하였다. 또한 기구의 변형과 파절 여부를 평가한 결과 엔진 구동형 니켈-타이타늄 파일인 ProFile과 ProTaper를 사용하여 근관성형시 수동형 스테인레스 스틸 파일인 K-Flexofile에 비해 근관의 변위를 적게 유발하고 특히 ProFile이 근관 성형시 바람직한 기구임을 시사하였다.

Keywords

References

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