根管交叉角度对琼脂桩核印模制取完整性的影响

发布时间：2018-03-02 19:49

本文选题：琼脂　切入点：印模　出处：《上海口腔医学》2014年04期 　论文类型：期刊论文

【摘要】：目的:以硅橡胶取桩法为对照,考察琼脂/藻酸盐联合法制取桩核印模的效果。方法:制作后牙双根管模具5个,设定不同根管交叉角度,分别为0°、10°、20°、30°、40°。以硅橡胶取模法为对照,应用琼脂/藻酸盐联合法制取桩核印模,在相同角度下分别用2种材料取模20次。对取出的印模进行评价,分析根管交叉角度对2种材料取模的影响。采用SPSS16.0软件包对数据进行统计学分析。结果:硅橡胶组各角度间取桩印模完整率无显著差异(P0.05);琼脂组中,当根管间交叉角度为40°时,印模完整率(60%)较0°组完整率(95%)及总完整率(83%)低,差异显著(P0.05);当根管间交叉角度为40°时,琼脂法取桩完整率(60%)低于硅橡胶法(90%)(P0.05)。琼脂法取桩总完整率(83%)显著低于硅橡胶法(96%)(P0.05);琼脂/藻酸盐法取桩的完整性与根管角度呈显著负相关(r=-0.901,P=0.037)。结论:当磨牙根管之间角度较小时,使用琼脂/藻酸盐联合法制取桩核印模可满足临床需求,当角度大于30°时,建议使用硅橡胶类材料。硅橡胶类材料取磨牙桩核印模完整率整体上优于琼脂。
[Abstract]:Objective: to investigate the effect of the combined Agar / alginate method on the preparation of post and core impression by using silicone rubber as the control. Methods: five molds of double root canal of posterior teeth were made and different root canal cross angles were set as 0 掳~ 10 掳~ 20 掳~ 20 掳~ (30 掳) ~ 30 掳~ 40 掳~ (40 掳) respectively. The pile core impression was made by Agar / alginate combination method. Two kinds of materials were used to obtain the impression 20 times respectively under the same angle. The impression taken out was evaluated. The effect of root canal cross angle on two kinds of materials was analyzed. The data were analyzed statistically by SPSS16.0 software package. Results: there was no significant difference in the complete rate of impression between different angles of silicone rubber group, while in Agar group, when the angle of root canal crossing was 40 掳, The impression integrity rate (60%) was lower than that of the 0 掳group (95%) and the total integrity rate (83%). The difference was significant (P0.05%). When the root canal crossing angle was 40 掳, The integrity rate of Agar / alginate method was significantly lower than that of silicone rubber method (P 0.05). The total integrity rate of Agar method was 830.The integrity of Agar / alginate method was negatively correlated with root canal angle. Conclusion: when the angle of root canal between molars is small, the correlation between the angle of root canal and the integrity of Agar / alginate method is significantly negative, conclusion: when the angle of root canal between molars is small, the ratio of integrity of Agar / alginate method is negatively correlated with the angle of root canal. When the angle is more than 30 掳, silicone rubber material is recommended to be used. The complete rate of core impression of molars obtained from silicone rubber material is better than that of Agar on the whole.
【作者单位】：广西医科大学口腔医院修复科;
【基金】：广西自然科学基金(2013GXNSFBA019162) 广西医科大学青年基金~~
【分类号】：R783.1

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