1. Axelsson P., Lindhe J., Nyström B. (1991) On the prevention of caries and periodontal disease. Results of a 15-year-longitudinal study in adults. J Clin Periodontol 18: 182–189
2. AAP (American Academy of Periodontology, Hrsg) (1998) Periodontal disease as a potential risk factor for systemic diseases. J Periodontal 69: 841–850
3. Arnljot H., Barmes D., Cohen L., Hunter P., Ship I. (1985) Oral Health Care Systems: An International Collaborative Study. Quintessence Pub Co, World Health Organization, Genf
4. Beck J. D., Offenbacher S., Williams R., Gibbs P., Garcia R. (1998) Periodontitis: A risk factor for coronary heart disease? Annals of Periodontology 3: 127–141
5. BMGS (Bundesministerium für Gesundheit und Soziale Sicherung, Hrsg) (2004) KV 45 BMGS