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Devi PV, Pradeep AR. NY State Dent J 2009; June/July: 30–34

The 1989 World Workshop Classification of Periodontal Diseases has, amongst other shortcomings, assigned inappropriate weight to the age of the patient. For example, how can a 21-year-old have a juvenile condition, when they demonstrate the incisor-first molar pattern of bone loss, characteristic of localised juvenile periodontitis? In addition, this classification does not have a gingival component, nor consider the relationship between diseases of the periodontal and endodontic tissues (combined periodontic-endodontic lesions). The 1999 Classification of Periodontal Diseases addressed these shortcomings but introduced others. It is illogical for an otherwise healthy 10-year-old, with local factors and generalised attachment loss to have chronic periodontitis. Also, there are no categories for smoking-associated periodontal diseases or for conditions of the peri-implant.