应用三维数字模型分析法评价硅橡胶两种印模方法的清晰度

发布时间：2018-03-07 04:26

本文选题：硅橡胶　切入点：印模技术　出处：《安徽医科大学》2014年硕士论文　论文类型：学位论文

【摘要】：目的应用三维数字模型分析法，对硅橡胶的两种印模方法的清晰度进行比较。方法从10名志愿者中选取40颗健康的前磨牙作为试验对象。用Silagum加成型硅橡胶对同一牙齿颊侧排龈后进行一次印模法（Putty-wash技术）及二次印模法(Double mixing技术)取模后，灌制超硬石膏模型。用Dscan三维激光扫描仪对模型进行扫描，进而获取模型的三维数据，通过专业的逆向工程软件进行数字模型的修整、拟合，测量并比较两种取模方法所制取模型在龈缘不同部位的龈沟宽度，以评价两种取模方法的清晰度。结果一次印模法与二次印模法所制取模型的龈沟宽度在龈缘中部及轴角部位的差异均具有统计学意义(p＜0.05)，二次印模法大于一次印模法；龈缘中部与轴角部位的龈沟宽度差异具有统计学意义(p＜0.05)，，龈缘中部大于轴角部位。结论在相同条件下制取模型，硅橡胶二次印模法比一次印模法更清晰。
[Abstract]:Objective to compare the definition of silicone rubber with three-dimensional digital model analysis. Methods A total of 40 healthy premolars were selected from 10 volunteers. Putty-wash technique and double mixing technique were used to remove the gingival of the same tooth by using Silagum and silicone rubber. The superanhydrite model is made. The model is scanned by Dscan 3D laser scanner, and then the 3D data of the model is obtained, and the digital model is modified and fitted by professional reverse engineering software. The width of gingival sulcus in different parts of gingival margin was measured and compared to evaluate the definition of the two methods. Results the width of gingival sulcus in the middle of gingival margin and axial angle was significantly different between the primary impression method and the secondary impression method (p < 0.05), and the second impression method was larger than the primary impression method. There was significant difference in the width of gingival sulcus between the middle part of gingival margin and the position of axial angle (P < 0.05), and the middle part of gingival margin was larger than that of axial angle. Conclusion under the same conditions, the silicone rubber secondary impression method is more clear than the primary impression method.
【学位授予单位】：安徽医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783

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