The apical migration of the gingival tissues with exposure of the root surface. This is commonly age-related and occurs in response to periodontal attachment loss associated with periodontitis. It may also be associated with thin gingivae, traumatic toothbrushing, or oral habits due to a disproportional size of the teeth in relation to the alveolar bone; it may sometimes occur as an unwanted side-effect following orthodontic treatment (iatrogenic damage).
Baker P., Spedding C. The aetiology of gingival recession. Dent Update 2002;29:59–62.