[Caries resistance].

Discussing the problems of caries resistance and caries susceptibility, we should remember that normal status of dental enamel is maintained by the dynamic equilibrium between demineralization and remineralization processes. Some aspects in the structural resistance of the enamel, determined by its maturing, are discussed. Data on the role of oral factors reflecting the status of the organism are presented. The authors do not agree that caries resistance, which is permanent throughout life, is determined by the CDL index. They give their arguments in favor of introducing the notion of "caries risk" and the criteria for evaluating this risk.