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目的对比评价三种根管充填技术的根尖封闭能力。方法收集2011年10月至2012年5月中国医科大学附属口腔医院口腔颌面外科门诊因正畸或牙周病拔除的新鲜离体单根管牙34颗,根管清理后用机用ProTaper镍钛锉经Crown-Down技术预备,然后随机分为A、B、C三组。A组(11颗)采用冷牙胶侧方加压充填技术充填根管,B组(10颗)采用超声侧方加压充填技术充填根管,C组(13颗)采用连续波热牙胶垂直充填技术充填根管。所有实验牙均使用AHPlus根充糊剂。根管充填后的各组实验牙采用染料渗透法检测根尖微渗漏的发生情况,体式显微镜下测量自根尖孔向冠方的染料渗透长度,采用SPSS11.5统计软件包对测量数据进行分析。结果 A组与B、C组的根尖微渗漏数值间差异有统计学意义(P<0.05),B组与C组的根尖微渗漏数值间差异无统计学意义(P>0.05)。结论超声侧方加压充填技术和连续波热牙胶垂直充填技术的根管封闭能力优于冷牙胶侧方加压技术,而前两种充填技术的根管封闭能力无明显差别。
Objective To compare and evaluate the apical sealing ability of three root canal filling techniques. METHODS: From October 2011 to May 2012, 34 fresh single root canal teeth were collected from oral and maxillofacial surgery clinics of the Affiliated Stomatology Hospital of China Medical University from October 2011 to May 2012. After root canal cleaning, Titanium file by Crown-Down technology preparation, and then randomly divided into A, B, C three groups. In group A (11), lateral root canal was filled with cold teethe lateral pressure filling technique. Group B (10) was filled with root canal using ultrasonic lateral pressure filling technique. Group C (13) Vertical filling technology filling root canal. All experimental teeth use AHPlus root filling paste. The experimental teeth of each group after root canal filling were tested for the occurrence of apical microleakage by the dye penetration method. The dye penetration length from the apical foramen to the crown was measured by a stereomicroscope. The measurement data were analyzed by SPSS11.5 statistical package analysis. Results There was significant difference in the numbers of apical microleakage between group A and group B and group C (P <0.05), but there was no significant difference between group B and group C (P> 0.05) . Conclusions Ultrasonic lateral pressure filling technique and continuous wave thermal adhesive vertical filling technique have better root canal sealing ability than cold canal gum lateral pressing technique, while the former two filling techniques have no significant difference in root canal sealing ability.