后牙咬合面凹凸不平的凹陷部位叫窝沟,是牙齿发育过程中牙尖融合障碍形成的缺陷。每颗牙齿的窝沟形状各异,深浅不一,是细菌生长繁殖的适宜场所。细菌在这平静而隐蔽的环境中,利用食物中的糖类(碳水化合物)繁衍生长,并在代谢过程中产生酸性物质,腐蚀牙齿,形成龋洞。因此,深的窝沟患龋病的危险性较高。同时,窝沟底部接近釉牙本质界或者位于牙本质内,一旦患龋,破坏可向深部迅速发展,形成外观小而实际深且大的龋洞,医学上称这种龋为“窝沟龋”。龋坏最 Posterior teeth occlusal surface of the concave part of the pit called pit fissure, is the process of tooth development cusp fusion obstacles to the formation of defects. Each tooth pit fissure different shapes, different shades, is the appropriate place for bacterial growth and reproduction. Bacteria in this calm and subtle environment, the use of food carbohydrates (carbohydrates) multiply and grow, and in the metabolism of acidic substances, corrosion of teeth, the formation of cavities. Therefore, the deep pit fissure with a higher risk of dental caries. At the same time, the bottom of fissure near the enamel dentin boundary or in the dentin, once suffering from caries, destruction can be rapidly developed to the deep, the appearance of small and actual deep and large cavities, medical said the caries as Caries ". Caries most