我们时常可以看到一些孩子的牙齿排列得虽然整齐,但外观却不像正常的那么洁白光亮,而是像粉笔那样暗白而毫无光泽,丝毫没有牙釉质的那种瓷器般的晶莹透亮。牙齿表面粗糙不平,凸凸凹凹的。这种情况称之为牙齿釉质发育不良。严重者,牙齿上有带状或窝状的棕色凹陷及不规则的小结节,如桑葚状,甚至在牙齿的切缘或牙尖 We often see some children's teeth arranged neatly, but the appearance is not as white as normal, but as dark and matt as chalk, the kind of porcelain-like translucent without enamel. Rough surface uneven, convex concave and convex. This condition is called tooth enamel dysplasia. In severe cases, the teeth have banded or nest brown depression and irregular nodules, such as mulberry-like, or even in the teeth of the cutting edge or cusp