Methods: We took dental impression with this method for 87 residual roots or crowns, Clinical effect was analyzed and summarized.
方法：对87颗残根残冠采用改良法进行根管取模，观察其临床效果，并进行分析、总结。
Objective: the purpose of this study was to investigate the application and clinical significance of taking dental impression with an improved method.
前言：目的：探讨一种改良核桩根管取模法的应用及临床意义。
Alginate impression materials and other dental products were awarded ISO 9002 quality and management system certificate.
藻酸盐印模材料和其它齿科产品全面通过ISO 9002质量管理体系认证。
Copied the same metal model and 10 impressions were taken in the same way. They were poured in dental stone, comparing the length divergence between dental stone plaster with the impression.
再以同一金属模型为母模，应用玉洁新消毒液调和藻酸盐印模材料制取10个印模，以超硬石膏灌模，比较石膏模型与母模之间指标线段长度差异。
Copied the same metal model and 10 impressions were taken in the same way. They were poured in dental stone, comparing the length divergence between dental stone plaster with the impression.
再以同一金属模型为母模，应用玉洁新消毒液调和藻酸盐印模材料制取10个印模，以超硬石膏灌模，比较石膏模型与母模之间指标线段长度差异。
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