摘要
目的比较ProTaper和K3预备对根管形态的影响。方法选取正畸减数拔除含颊舌双根管的上颌前磨牙40颗,随机分为2组,分别采用机用镍钛器械ProTaper和K3预备根管,预备前、后进行三维成像,记录预先设立的根管横断面、颊舌向切面、近远中向切面三个位点的三维数据,评价根管预备的效果。结果 K3组相对于ProTaper组对牙本质的切削量少,对根管形态的影响较小,ProTaper组和K3组有显著性差异(P<0.01);结论 K3组预备后的根管形态优于ProTaper组。K3预备后能较好的保持根管形态,对根管壁牙本质的切削量少,较少地削弱了余留牙体组织的抗折力。
Objective To evaluate the root canal shaping abilities of ProTaper and K3. Methods A total of 40 extracted maxillary premolars each with two root canals were divided into two groups,one prepared by ProTaper and the other by K3 rotary instruments. 3D imaging was made respectively before and after preparation. The 3D data of three loci of the cross section,buccolingual plane and the mesial and distal section were recorded. The efficiency of preparation was analyzed by three-dimensional imaging. Results Compared to ProTaper,the cutting ability on dentin of K3 was a little inferior,and significant difference was found between the two groups( P〈0. 01). Conclusion The shape of root canals after preparation of K3 was better than that after the preparation of ProTaper. In the K3 preparation group,the dentin removal was less,which Less weakened the fracture resistance of the remaining tooth structure.
出处
《口腔医学》
CAS
2016年第1期68-70,共3页
Stomatology