Caries

Caries is outlined by a variety of factors oral compound role as a result of dental hard tissue loss for STDs, Inorganic performance of the demineralization and the decomposition of organic matter. Along with the development of the course is a color change to the formation of lesions substantive process of evolution. Is characterized by high morbidity, widely distributed. Caries-average rate of 50%, is the main oral disease, which is the most common human diseases, WHO has been with the cancer and cardiovascular disease, serves as control of the three major human diseases. Pathogenesis of pathology after a long-term study is now the clear, dental caries is caused by various factors caused composite role, The currently accepted theory is the cause of dental caries four joint factor theory (Figure 3 -1), including bacteria, the oral environment, Host and time, the basic point : cariogenic foods (particularly sugar and refined carbohydrates) in sugar, firmly attached to the tooth surface protein from the saliva on the formation of acquired membrane, in which teeth from the surface anatomy and biochemistry, biophysical characteristics of the formation has not only been firmly attached to the tooth surface, but also appropriate temperature, have enough time in deep plaque acid production, erosion of teeth, to make it demineralization, and thus undermine organic produce tooth.