Which statement about the development of chronic periodontal disease is false?

In the context of chronic periodontal disease, the statements highlight various aspects of disease progression. The assertion regarding anaerobic bacteria attacking alveolar bone resulting in tooth mobility is incorrect, as it oversimplifies the complex pathway of periodontal disease and misrepresents the relationship between bacteria and the structures involved.

Chronic periodontal disease is typically characterized by the presence of specific bacteria that contribute to a chronic inflammatory response, but it's important to note that while bacterial actions can lead to inflammation and tissue breakdown, they do not directly cause tooth mobility in the manner suggested. Tooth mobility usually arises from a combination of factors, including destruction of the supporting structures such as the periodontal ligament and alveolar bone due to chronic inflammation, not simply from an attack by anaerobic bacteria.

The other statements accurately reflect the processes involved in chronic periodontal disease. The formation of micro-ulcers and toxins entering the soft tissues, the relationship between subgingival calculus and plaque, and the occurrence of true pockets due to destruction of the periodontal ligament all contribute to the understanding of how periodontal disease develops and progresses. Thus, the statement about anaerobic bacteria is the one that does not accurately describe the development of chronic periodontal disease.