To compare dimensional accuracy of models poured from 7 alginate impression materials by measuring and comparing the lengths between marks on the models. No significant difference was found between the dimensions of the models from any alginate impression and prototype.%测量比较7种藻酸盐印模材料取模、灌模后模型与原模型各标记点间距离的差异,评价藻酸盐印模材料对模型尺寸准确性的影响.结果表明,7种藻酸盐印模材料灌制的模型与原模型的尺寸差异不明显.
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