Below are listed some such factors. The presentation starts with a number of the risk indicators, followed by factors involved in the biochemical process. It should be observed that 'bad economy' under certain circumstances may promote caries, for example if carbohydrate products in the area are cheaper than proteins. In another society, 'bad economy' may work in the opposite direction, as there will be no money to buy sweets. Also, the conditions can result in more cariogenic food and in less good oral hygiene.
Handicaps can in various ways affect oral hygiene.
However, it is a risk factor in that sense that the caries process may continue also in the future. Newly erupted teeth and exposed root surfaces are less resistant. Crowded teeth and various retentive sites, including orthodontic appliances, indicate risk for increased plaque accumulation and reduced saliva flow over the tooth surfaces concerned. For each of the circumstances or findings mentioned above, the reason why they may indicate increased caries risk is that they in one way or another reflect, or affect, the biochemical events on the tooth surface where a carious lesion may develop. B. Biochemical factors Factors to which the toothsurface is directly exposed , and which contributes to the development of the lesion.