根充主牙胶尖对侧压深度和根尖微渗漏的影响  

The effect of different gutta-percha master cones on first penetration depth of spreader and apical microleakage

作　　者：刘柳慧[1,2] 谢晓莉[2] 陈敏慜[2] 殷凌云[2] 张宇[2] 

机构地区：[1]复旦大学附属金山医院口腔科,上海200540 [2]中南大学湘雅医院口腔科,湖南长沙410008

出　　处：《上海口腔医学》2009年第4期355-359,共5页Shanghai Journal of Stomatology

摘　　要：目的:通过比较不同主牙胶尖充填离体后牙弯曲根管后侧压针首次侧压深度及根尖渗漏的葡萄糖量,探讨主牙胶尖大小对侧压的有效性和根尖微渗漏的影响。方法:选用后牙单弯曲单根管牙根66个,随机分为7组,各组主牙胶尖分别为A组(11颗):0.06°/25#;B组(11颗):0.06°/20#;C组(11颗):0.04°/30#;D组(11颗):0.04°/25#;E组(11颗):0.02°/25#;F组(5颗):阳性对照组,AH-PLUS根管糊剂;G组(6颗):阴性对照组,完整的牙。A～E组用冷牙胶侧方加压法充填,记录NiTi侧压针首次进入根管的深度,并于第1、2、4、7、10、15、20、30天用葡萄糖氧化酶法测定从冠方向根方渗漏的葡萄糖量。实验结果采用SPSS16.0软件包进行方差分析和LSD检验。结果:根管工作长度与NiTi侧压针首次侧压深度之差D组显著小于A、C组(P<0.05),E组显著小于A、B、C组(P<0.05),而其余组间无显著差异(P>0.05);阳性对照组根尖渗漏的葡萄糖浓度显著高于其余6组(P<0.05),而5个实验组间无显著差异(P>0.05),且与阴性对照组间无明显差异(P>0.05)。结论:选用小锥度主牙胶尖充填的弯曲根管侧压针首次进入的深度最深,但其短期内根尖的封闭性并无优势。PURPOSE：This study was to evaluate the effect of different master cones on apical microleakage through comparing first penetration depth of spreader and the leakage concentration of glucose in the curved root canal of the extracted posterior teeth filled with different gutta-percha master cones.METHODS：Sixty-six extracted roots of human posterior teeth with a single,curved canal were collected and divided into five experimental groups of 11 roots in each group（Group A：master cone 0.06 tapered,25#;Group B：0.06 tapered,20#;Group C：0.04 tapered,30#;Group D：0.04tapered,25#;Group E：0.02 tapered,25#） using cold lateral condensation as positive control group（group F,AH-PLUS sealer） of 5 roots and negative control（group G,integrated teeth）of 6 roots.The first penetration depth of spreader and the concentration of glucose in apical reservoir at 1,2,4,7,10,15,20 and 30 days were measured,respectively.The data was analysed with ANOVA and LSD test using SPSS 16.0 software package.RESULTS：The value of working length minus the first penetration depth of spreader in group D was significantly smaller than that in group A and group C（P〈 0.05）,and that in group E was significantly smaller than that in group A,B,C（P〈0.05）,but no significant difference（P〉0.05） in other groups.The concentration of leakage glucose in group F was significantly higher than that in the other six groups（P 〈0.05）,and there were no significant difference in the five experimental groups（P 〉0.05）,which had no significant difference from the negative control group G（P〉0.05）.CONCLUSIONS：Choosing smaller tapered master cone could get better apical filling in curved canals,but it has no superiority in apical sealing in short time.

关 键 词：冷牙胶侧方加压法 侧压深度 微渗漏 葡萄糖氧化酶法 

分 类 号：R781.05[医药卫生—口腔医学]