[The dialectic unity of norm and individuality in assessing the development of the mixed dentition]

Each norm conception is self-limiting and, consequently, may be incorrect in individual cases. This contradiction is eluced by considering norm and individuality as a dialectic oneness when judging a situation. The individual characteristics of the growth and development of the dentition are determined by a great number of specific features. The importance of the individual tooth sizes and of the specific rhythm of dentition is used to emphasize that the assessment must aim at determining the patient's individual developmental optimum. It is oriented to the general norm but must not coincide with it. The achievement of this specific development optimum may be furthered by preventive regulating measures.