根管清理效果的比较研究,以往多在人的离体牙上进行,为了使实验结果与临床实际情况一致,作者以临床病人因正畸需要欲拔除的牙为实验对象,比较了手持器械与声振器械根管清理的效果。方法步骤实验牙均为牙根较直,单根管的活髓牙。局麻后上橡皮障,常规开髓、拔髓。手持器械组用K型锉根管预备至50号; In order to make the experimental results consistent with the actual clinical situation, the author of the clinical patients due to orthodontic need for removal of the teeth as the experimental object, compared handheld devices and Vibration instrument root canal cleaning effect. Method steps Experimental teeth are more straight root teeth, single canal live pulp teeth. Local anesthesia after the rubber barrier, the conventional open pulp, pulp. Hand-held device group with K-type file root canal preparation to 50;