中国医药科学Issue(17)：15-17,3.
不同局部托盘制取藻酸盐印模后的石膏模型精确性研究
Study on accuracy of plaster model after alginate impression taken through using different trays
摘要
Abstract
Objective To systematically review accuracy of gypsum model after Alginate Impression taken through using different trays.Methods Through perfusion of anhydrite, impression of alginate standard model was made by the method of local tray in the upper. Distance from proximal middle edge to distal middle edge of gingival margin (4 teeth), and distance from distal middle edge to proximal middle edge (2 teeth) were measured respectively. The two distances were compared and analyzed statistically with normal standard values. Research subjects were allocated to two groups of aluminum local trays and steel local trays according to the different materials used by local trays, and subjects were also allocated to 1-hour group and 12-hour group based on different measuring time. All groups were measured 6 times respectively.Results In the measuring of distance from proximal middle edge to distal middle edge, the differences between all the model groups and the standard model were statistically significant (P<0.05). In the comparison and analysis of the distance from distal middle edge to proximal middle edge, the differences between the standard model and steel trays were not statistically significant (P=0.258), and the differences between the standard model and the rest of the groups were statistically significant (P<0.05). In time comparison, the differences between 1-hour group and 12-hour group were not statistically significant (P>0.05).Conclusion During the production of alginate impression, the distance from distal middle edge to proximal middle edge is close to that of the standard model, and the precision of steel and aluminum trays impression is similar regarding the distance from proximal middle edge to distal middle edge. In clinical practice, for the production of two types of impressions of the distance from proximal middle edge to distal middle edge and the distance from distal middle edge to proximal middle edge, the differences of material, size and proportion of plaster model are not statistically significant.关键词
藻酸盐/印模/石膏模型/精确性Key words
Alginate/Impression/Plaster model/Accuracy分类
医药卫生引用本文复制引用
郭建敏..不同局部托盘制取藻酸盐印模后的石膏模型精确性研究[J].中国医药科学,2014,(17):15-17,3.基金项目
河南省开封市人民政府立项（2012-J-18-R04/10）。 （）
