Tests of prophylactic therapy of dental caries and periodontal diseases and oral health knowledge have poor results.

龋齿与牙周疾病的防治知识及口腔保健知识测试结果普遍较差。

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Tests of prophylactic therapy of dental caries and periodontal diseases and oral health knowledge have poor results.

龋齿与牙周疾病的防治知识及口腔保健知识测试结果普遍较差。

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