The onset age of periodontal destruction.

In the present paper, the onset age of periodontal destruction is discussed. Results of epidemiological studies have shown that with increasing age, the prevalence of periodontitis in a population increases. Data show that after the age of 40 years, the % of the population affected by periodontitis remains rather constant. If it is supposed that the incidence of periodontitis after the age of 40 is zero (no new cases), then extractions resulting in edentulousness due to periodontitis should lead to a decrease of the prevalence of periodontitis. However, after the age of 40 years, the prevalence of periodontitis remains about the same, whereas edentulousness due to periodontitis increases. This suggests that even at a relatively old age, the onset of periodontitis may occur. On the other hand, periodontal destruction has also been found in the primary dentition. Especially on the basis of family studies and studies on localized juvenile periodontitis patients, it can be supposed that in a substantial part of the population, periodontal destruction starts early in life.