Cailleteau J G, Mullaney T P
University of Kentucky College of Dentistry, Department of Oral Health Practice, Lexington 40536-0084, USA.
J Endod. 1997 Jun;23(6):394-6. doi: 10.1016/S0099-2399(97)80191-4.
Maintaining an open apex beyond the apical constriction with an endodontic file during canal instrumentation is a concept that has been advocated by several authors and clinicians. To ascertain the prevalence of teaching the patency concept as well as various instrumentation and obturation techniques in the United States dental schools, a survey was conducted. Forty-eight out of a total of 53 dental schools (91%) responded to the survey. Results indicate that 50% of the schools surveyed teach the concept of patency to their undergraduates or graduates or both; 83% teach a step-back instrumentation technique; and 89.6% teach lateral condensation of gutta percha as their primary obturation technique.
在根管预备过程中使用根管锉保持根尖狭窄部以外的根尖孔开放，这一概念已得到多位学者和临床医生的提倡。为了确定美国牙科学院中讲授根尖通畅概念以及各种预备和充填技术的普及情况，开展了一项调查。在总共53所牙科学院中，有48所（91%）对调查做出了回应。结果表明，接受调查的学校中有50%向本科生或研究生或两者讲授根尖通畅概念；83%讲授逐步后退预备技术；89.6%讲授牙胶侧向加压作为其主要充填技术。
