Fishelberg Gerald, Pawluk John W
University of Medicine and Dentistry of New Jersey-New Jersey Dental School, Newark, NJ, USA.
Compend Contin Educ Dent. 2004 Jan;25(1):17-8, 20-2, 24; quiz 25, 47.
Nickel-titanium (Ni-Ti) rotary files have become a mainstay in clinical endodontics because of their ability to produce smooth tapered canal preparations with reproducible results. In contrast, intracanal file separation has become a nightmare for many practicing dentists. Factors attributed to breakage of rotary files include canal curvature and other anatomic challenges, practitioner experience, frequency of use, and speed of rotation. When the practitioner is familiar with the instrument and is experienced with its use, Ni-Ti files can be an important adjunct to the practicing dentist and should not cause anxiety.
镍钛旋转锉已成为临床牙髓病学的中流砥柱，因为它们能够制备出光滑的锥形根管，且结果具有可重复性。相比之下，根管内锉折断已成为许多执业牙医的噩梦。导致旋转锉折断的因素包括根管弯曲度和其他解剖学难题、从业者经验、使用频率以及旋转速度。当从业者熟悉该器械并具有使用经验时，镍钛锉可以成为执业牙医的重要辅助工具，不应引起焦虑。
