Tooth surface

Methods Lobene index and color analysis system of digital camera and computer were used to measure Lobene index and the percentage of stain on the tooth surface before and after using two tooth whitening agents.

目的研究两种漂白剂去除牙面色斑的效果。

In this paper,the formation and development of dental ecofilm,especially the phenomena and mechanism of ecofilm formation,which are the centers of the problem,are concisely reviewed.

牙面生态膜是细菌致龋活动场所。

Methods Scanning electron microscopy was used to observe NS paint.

目的　探讨NS牙面涂料对牙本质过敏症的治疗机制。