Humans 5 human 5 pocket depth Adult 4 adult 4 periodontal disease 4 periodontitis 4 Aged 3 Periodontitis 3 aged 3 epidemiology 3 Article 2 Female 2 Germany 2 Male 2 Middle Aged 2 Nutrition Surveys 2 Periodontal Attachment Loss 2 United States 2 classification 2 clinical attachment loss 2 female 2 major clinical study 2 male 2 middle aged 2 nutrition 2 periodontal disease assessment 2 prospective study 2 recession 2 Adolescent 1