구강회복응용과학지 (Journal of Dental Rehabilitation and Applied Science)

  • 제22권2호
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  • Pages.173-180
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  • 2006
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  • 2384-4353(pISSN)
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  • 2384-4272(eISSN)
대한턱관절교합학회 (Korean Academy of Stomatognathic Function and Occlusion)
권호 표지

치과용 단층촬영을 이용한 Stainless-Steel File과 MFile-System® 전동식 기구의 근관 성형 능력에 대한 비교 연구

A Comparison of Stainless-Steel File and MFile-System® Ni-Ti Rotary Instrument in Canal Preparation using Dental Computed Tomography

  • 서동진 (전북대학교 치과대학 치과보존학교실) ;
  • 윤미란 (전북대학교 치과대학 치과보존학교실) ;
  • 이린 (전북대학교 치과대학 치과보존학교실) ;
  • 유미경 (전북대학교 치과대학 치과보존학교실)
  • Seo, Dong-Jin (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Yoon, Mi-Ran (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Lee, Rin (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Yu, Mi-Kyoung (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
  • 발행 : 2006.06.30
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초록

Objectives The aim of this study is to compare the quality of root canal preparation completed using MFile-$System^{(R)}$ instrument ( Komet, Gebr.Brsaseler, Germany) and conventional stainless steel file in the canals of Maxillary molar teeth that had a canal curvature between $25^{\circ}$ or more Materials & Methods Buccal canals of 24 first and second maxillary molar teeth, extracted for periodontal and prosthetic reasons were used. Tissue fragments and calcified debris were removed from teeth by scaling and the teeth were stored in 10% formalin solution for 24 hour. Then, teeth were stored in saline until used. To be included the roots had to have completed formed apices and angle of curvature ranging between $25^{\circ}$ or more according to the criteria described by Schneider(1971). Palatal and Second mesiobuccal canals were not included. Teeth were embedded into transparent acrylic. The teeth were randomly divided into two experimental groups. All teeth were scanned by Dental CT (PSR9000N, Asahi, Japan) to determine the root canal shape before instrumentation. Image slices were prepared from the apical end point to the pulp chamber. The first two sections were 2 mm from the apical end of root and 2 mm below the orifice. Further section was recorded, dividing the distance between the sections of apical and coronal levels into two equal lengths. 12 teeth were instrumented using stainless steel fileand another 12 teeth were instrumented using MFile-$System^{(R)}$. Following the completion of the instrumentation, the teeth were again scanned and compared with the cross sectional images taken prior to canal preparation. Amount of transportation and centering ability was assessed. Student's t-test was used for statistical analysis. Result Less transportation occurred with MFile-$System^{(R)}$ rotary instrumentation than stainless steel instrument. MFile-$System^{(R)}$ had better centering ability than stainless steel instrument. Conclusion MFile-$System^{(R)}$ rotary instrumentation transported canals less and had good centering ability.

키워드

과제정보

연구 과제 주관 기관 : 전북대학교

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