... with his face to the north 脸朝北 the tests on his teeth 对牙齿的测试 give us an idea of … 使我们对…有了解 ...
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《无糖糖果对牙齿健康真的有益吗？》这篇论文测试了糖类替代品的作用，它们能降低牙齿侵蚀的风险。
The paper, Are sugar-free confections really beneficial for dental health?, examined the role of sugar substitutes used in products to reduce the risk of tooth decay.
方法：采用新鲜的人离体牙，对不同条件下贴面烤瓷与牙齿的粘接强度进行测试；
Methods: Bond strength were measured in different conditions between veneer porcelain samples and fresh extracted teeth.
针对牙齿美白剂对牙釉质表面结构之影响，以扫描式电子显微镜，结合影像 分析进行碎形维度分析，将粗糙度（roughness）量化，再以接触角测试分析牙齿 表面的粗糙程度对于亲水性的影响；
The etched depth profile of enamel surface was tested by SEM and digitized by image analysis to detect the roughness of enamel. And the fractal dimension could quantify the roughness.
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