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of the oral mucosa that covers the alveolar process including the gingiva (keratinized tissue) and the adjacent alveolar mucosa. Mucogingival deformity. A departure from the normal dimension and morphology of and/or interrelationship between gingiva and alveolar mucosa. The abnormality may be associated with a deformity of the underlying alveolar bone. The group endorsed the definition of mucogingival therapy as described in the 1996 World Workshop in Periodontics (i.e., “Non-surgical and surgical correction of defects in morphology, position, and/or amount of soft tissue and underlying bone.”).1 In addition the current definition of gingival recession was also endorsed (i.e., “Location of the gingival margin apical to the cemento-enamel junction.”).2 Note: The group recommended that a classification system for mucogingival deformities around dental implants be similar to the one suggested above for teeth (i.e., “I. Mucogingival Deformities Around Teeth”). The group also recommended that the current classification of implant-related conditions (e.g., peri-implantitis) be retained until a new classification system for implant-related issues can be formulated.

The following working definitions for the types of occlusal trauma were developed by the group: Occlusal trauma. Injury resulting in tissue changes within the attachment apparatus as a result of occlusal force(s). Primary occlusal trauma. Injury resulting in tissue changes from excessive occlusal forces applied to a tooth or teeth with normal support. It occurs in the presence of: 1) normal bone levels, 2) normal attachment levels, and 3) excessive occlusal force(s). Secondary occlusal trauma.* Injury resulting in tissue changes from normal or excessive occlusal forces applied to a tooth or teeth with reduced support. It occurs in the presence of: 1) bone loss, 2) attachment loss, and 3) “normal”/excessive occlusal force(s).

fashion by the research community. It should be emphasized that these tooth-related conditions are not separate disease entities, but may serve as localized predisposing and/or modifying factors in the onset or progression of plaque-induced gingival diseases and periodontitis. These conditions could be relevant to any of the gingivitis or periodontitis classifications. The group agreed upon the following classification of these tooth-related issues