摘要
目的:评价3种机动镍钛器械预备磨牙根管的效果,为临床选择机动镍钛系统提供参考。方法:将临床需行根管治疗的90颗磨牙随机分为ProTaper、K3、Mtwo3组,ProTaper和K3组采用冠向下法预备根管,Mtwo组采用常规法预备根管,3组均采用冷侧压法充填根管。根据治疗前后的X线片评价根管预备效果,比较器械损耗、预备时间及术中、术后并发症的发生率。使用SAS9.0软件包进行统计分析,根管弯曲度和操作时间的比较用t检验,根管内并发症和术后疼痛的发生率用χ2检验。结果:3种机用镍钛器械均能很好地维持根管的弯曲和走向,根管的锥度和流畅度好。无根管偏移、根尖阻塞、台阶形成等并发症发生,术后疼痛发生少且程度轻。预备过程中,ProTaper组有4根锉发生器械折断,K3组有3根锉发生器械折断,Mtwo组有1根锉发生器械折断。Mtwo的操作时间(3.94min)比ProTaper(4.71min)和K3(4.58min)短,差异有统计学意义(P<0.05)。结论:3种机动镍钛预备系统用于预备磨牙根管,效率高,成形能力佳。Mtwo机动镍钛器械使用常规法预备方法更简单,预备时间短且有效。
PURPOSE：To evaluate three kinds of nickel-titanium instruments applied to molar root canal preparation. METHODS：A total of 90 molars treated by root canal therapy were randomly assigned to three groups：ProTaper group,K3 group and Mtwo group. Crown-down technique was used in ProTaper and K3 group,while Mtwo group was treated with routine preparation technique. All teeth in 3 groups were filled by lateral condensation technique. Treatment effect of 3 groups was evaluated according to pre-and post-operative X-ray films. Wearing and tearing degree of equipment,preparation time and postoperative complications incidence of 3 groups were also compared. All statistical analysis was performed using SAS9.0 software package. Data of root canal curvatures and preparation time was compared using t test; the incidence of complications of root canal treatment and postoperative pain was analyzed using Chi -square test. RESULTS：In three groups,root canals had no deviation or no ledge,could maintain the root canal anatomy in early form,and achieved good preparation results. In this study,four ProTapers,three K3s and one Mtwo instrument were fractured. The average root canal preparation time of the Mtwo group was 3.94 min,significantly less than the ProTaper （4.71 min） group and the K3 （4.58 min） group. CONCLUSIONS：Three rotary nickel-titanium systems tested in this study are effective in the molar root canal preparation. The Mtwo instrument is much easier and faster during preparation with routine preparation technique.
出处
《上海口腔医学》
CAS
CSCD
2010年第2期118-123,共6页
Shanghai Journal of Stomatology
基金
上海市科学技术委员会资助项目(08DZ2271100)~~
关键词
常规法
冠根向深入法
根管预备
机动镍钛器械
Routine preparation technique
Crown-down technique
Root canal preparation
Rotary nickel-titanium instruments
