2种根管充填方法的根尖封闭性比较  

Comparison of the apical sealability of two canal obturation methods

作　　者：张惠珍[1] 章婵[1] 何宗来[1] 文乾钧 

机构地区：[1]杭州市第四人民医院口腔科,浙江杭州310002

出　　处：《上海口腔医学》2004年第5期447-449,共3页Shanghai Journal of Stomatology

摘　　要：目的:比较侧压法与侧压垂直相结合法(混合法)根管充填后的根尖封闭性。方法:选择79颗单直根管离体前牙,经逐步后退法预备根管。75颗牙随机分为2组进行根管充填,A组:40颗,侧压充填;B组:35颗,侧压充填和垂直加压充填联合使用。另4颗作为对照组。1%亚甲基蓝溶液染色72h后,将牙体纵劈,观察根尖部染料的渗漏情况。结果:2组标本充填后,染料的线性微漏长度存在显著差异(P<0.01),混合充填法组的微漏较侧压法小。结论:侧压充填后对根管近冠1/3牙胶进行热垂直加压,可减少微漏的发生。PURPOSE: To compare the apical sealability of canal obturation with lateral condensation (LC) and combined LC with vertical condensation (hybrid condensation,HC ). METHODS: 79 single canal extracted anterior teeth were instrumented with step-back technique and then randomly divided into three group. Group A was obturated only with LC ; group B was obturated with HC. group C was as control group. All teeth were dyed in 1% india ink for 72 hours, then split into two parts longitudinally. The linear length of dye was measured as the result of microleakage. RESULTS: The linear length of microleakage between group A and group B had significant difference (P<0.01). The microleakage of HC was lower than LC. CONCLUSION: The vertical condensation to gutta-percha at crown third after canal obturation with LC could reduce the apical microleakage.

关 键 词：侧压充填法 混合充填法 根尖封闭性 微漏 

分 类 号：R781.05[医药卫生—口腔医学]