方法：分别用自动混合型聚醚橡胶和藻酸钾印模材料制取修复体印模207例、230例，比较印模精确性。

Methods 207 auto-mixed poly rubber impressions and 230 alginate impressions were fabricated for restorations to compare their accuracy.

藻酸盐印模材料和它齿科产品全面通过ISO9002质量管理体系认证.

Alginate impression materials and other dental products were awarded ISO 9002 quality and management system certificate.