采用牙胶充填比例测算法评价连续波热牙胶充填技术根管充填致密度  

Evaluation on the homogeneity and density of root canal filling with the continuous wave of condensation technique by measurement of the percentage of gutta-percha-filled area

作　　者：贡艳宏[1] 刘卫红[1] 张光东[1] 

机构地区：[1]南京医科大学口腔医学研究所,南京医科大学附属口腔医院牙体牙髓科,江苏南京210029

出　　处：《南京医科大学学报（自然科学版）》2012年第9期1298-1302,共5页Journal of Nanjing Medical University(Natural Sciences)

基　　金：江苏高校优势学科建设工程资助项目(2011-137)

摘　　要：目的:比较冷侧压充填技术和连续波热牙胶充填技术的根管充填致密性。方法 :选取20颗离体单直根管下颌前磨牙,机用镍钛ProFile冠向下法根管预备后随机分为两组(每组10颗),分别用连续波热牙胶充填和冷侧压充填,1周后用低速锯在距根尖孔2、4、6、8 mm处依次做水平片切,采用图像分析处理技术测算各牙胶充填面积占横断面根管面积的百分比(percentage of gutta-percha-filled area,PGP)。结果:在距根尖孔2、4、6 mm处,两组PGP无显著差异(P>0.05);而在距根尖孔8 mm处连续波充填组的PGP高于冷侧压充填组(P<0.05)。结论:在根管中上段,连续波热牙胶充填的致密性明显优于冷侧压充填,而在根尖部无显著差异。Objective：To compare the root canal filling density of continuous-wave condensation technique with cold lateral compaction.Methods： Twenty freshly extracted human mandibular premolars with one single canal were selected and divided into two groups,ten teeth each.The root canals were prepared with a rotary system in a crown-down technique and obturated with either cold lateral compaction or continuous-wave condensation with EQ plus system.All roots were horizontally sectioned at 2,4,6,8 mm from the apical foramen using low-speed saw.The cross-sectional area of the canal and gutta-percha were all measured using an image-analysis program.The percentage of gutta-percha-filled area（PGP） was then calculated.Results： With regard to PGP,no significant difference was found at the levels 2,4,6 mm from apex foramen between two groups,and however PGP of continuous-wave condensation group was significantly higher than that of cold lateral compaction group at 8 mm from apical.Conclusion： The density of continuous-wave condensation technique was superior to lateral compaction technique in middle and coronal portions of canals.However,there was no significant difference in the apical portion of canal between two groups.

关 键 词：连续波充填技术 机用镍钛器械 牙胶充填比例 

分 类 号：R783.3[医药卫生—口腔医学]