【作者】 张富华；

【导师】 谭红；

【作者基本信息】 四川大学 ， 口腔临床医学， 2006， 硕士

【摘要】 根管治疗是现今牙髓病和根尖周病的基本治疗方法。根管的严密封闭是根管治疗成功的必要前提之一。本研究利用体外实验比较及评价弯曲根管的预备方法对根管充填后封闭性影响。 一、不同方法预备的树脂弯曲根管对其根管充填密封性的影响 目的：采用三种常用预备器械预备仿真单弯树脂根管，观察不同预备方法获得的根管形态对根管充填后根尖孔微渗漏的影响。 方法：选取单弯仿真树脂根管(弯曲度为40°)34个，随机分为五组。其中三个实验组：不锈钢锉组；手用ProtaPer组；机用ProtaPer组，每组样本数10个。剩余4个分为阴性对照组和阳性对照组，每组样本数2个。AH-PLUS根充糊剂加牙胶尖冷测压法充填树脂根管，染料微渗漏法评价密封性，分别在第3，5，7，9，11天定时观察，记录根尖孔染料微渗漏的发生率、染料根管内渗漏的深度以及观察期末染料微渗漏的程度和分布更多还原

【Abstract】 Root canal therapy is a fundamental method of treating pulpal and periapical diseases nowadays. whether the root canal be sealed strictly or not is critical to a successful root canal therapy .The purpose of this study in vitro was to evaluate the effect of methods in curved canal preparation on the seal of root fillings.Part Ⅰ Effects of different preparation methods on the seal of root fillings in simulated resin curved root canalsObjective: The aim of this study was to evaluate and compare the sealability of root fillings in simulated resin curved root canals prepared with three different endodontic instruments.Methods: Thirty-four simulated resin canals(curvature=40° ) were randomly divided into three equal test groups of 10, respectively prepared with stainless steal K files, Nickel-Titanium hand instruments and Nickel-Titanium rotary instruments,and two control groups of 2,one was negative control,the other was positive control . The prepared canals were obturated with lateral condensation of gatta percha. Apical micro- leakage was更多还原