龋齿牙髓炎牙根尖周炎英文课件.ppt

文档介绍：Dental caries Dental caries, also known as tooth decay, cavities, or caries, is a breakdown of teeth due to activities of bacteria. Signs and symptoms of enamel chalky white spot "microcavity" cavitation(unreverseble) dark brown and shiny(dental tubules) 2. pain transient fracture constant no longer be sensitive to hot or cold constant pain spreading life-threatening c omplications (1) anisms in dental plaque (2) a susceptible tooth surface (3) time (4) must be present together for dental caries to occur (5) Saliva (6) and fluoride (7) are modifying factors Enamel --- Dentin diagnosis inspection (may do harm to tooth) radiographs (X-rays) blowing