Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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SHAPING ABILITY OF NICKEL-TITANIUMROTARY FILES

다양한 엔진 구동형 파일의 근관 성형 능력 비교

  • Park, Wan-Ky (Department of Conservative Dentistry, College of Dentistry, Pusan National University) ;
  • Lee, Hee-Joo (Department of Conservative Dentistry, College of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative Dentistry, College of Dentistry, Pusan National University)
  • 박완기 (부산대학교 치과대학 보존학교실) ;
  • 이희주 (부산대학교 치과대학 보존학교실) ;
  • 허복 (부산대학교 치과대학 보존학교실)
  • Published : 2004.01.01
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Abstract

This study compared the shaping ability of nickel-titanium rotary files with different rake angle and radial land. The nickel-titanium files used in this study were Profile(Dentsply, Maillefer, Ballaigues, Switzerland), Hero 642(Micromega, Besancon, France) and K3 (SybronEndo, Glendora, Ca, USA) file. Resin blocks substituted for root canals. 36 resin blocks were divided into 3 groups with 12 canals each The time for canal preparation was recorded. The images of pre- and postoperative resin canal were scanned and those were superimposed Amounts of canal deviation, total canal widths, inner canal widths, and outer canal widths were measured at apical 1, 2 ,3, 4, 5, 6, and 7mm levels. The amount of canal deviation was the smallest in Profile group , and the time far canal preparation was the shortest in Hero 642 group. K3 group resulted in competent characteristics in both measurements. Positive rake angle seemed to result in fast shaping of root canal and radial land guide the instrument in center of the canals and around curvatures. Radial land also tended to reduce the sense of screwing into the root canal. The proper selection of the nickel-titanium fie based on the knowledge about file design is needed for the safer, simpler and faster root canal therapy.

Keywords

References

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