title: Reactive correction of a maxillary incisor in single-tooth crossbite following periodontal therapy.
abstract: BACKGROUND
  The reactive correction of a single tooth anterior crossbite following periodontal therapy is described. This case report provides new information regarding correction of a crossbite relationship and con- firms existing reports of tooth movement following periodontal therapy.
  
  
  METHODS
  A 39-year-old woman in good general health presented with a history of recurrent periodontal abscesses of a maxillary incisor. Probing depths of the abscessed tooth ranged from 5 to 12 mm, and class 1 mobility was noted. Radiographs revealed that the tooth had previously been treated endodontically. The patient's periodontal diagnosis was generalized chronic moderate to severe periodontitis. Treatment considerations were complicated by a single-tooth crossbite relationship of the involved incisor and clinical evidence that the periodontal abscess communicated with an apical infection. Treatment of the abscess consisted of cause-related therapy, bone grafting, and occlusal adjustment.
  
  
  RESULTS
  Five months after surgical treatment, an edge-to-edge incisal relationship was observed, the first indicator of tooth movement. Further correction to a normal incisal relationship resulted 1 year after modification of the proximal contact. At this time, there was normal probing depth with only slight recession and mobility. Bone fill was radiographically noted.
  
  
  CONCLUSIONS
  It appears that some cases of maxillary incisor crossbite that are complicated by periodontal disease may be corrected, without orthodontic appliances, following periodontal treatment.
authors.affiliation: Department of Dentistry, Buddhist Tzu-Chi General Hospital, Hualien, Taiwan. tzdental@yahoo.com
authors.forename: Chih-Hao
authors.initials: CH
authors.lastname: Huang
authors.forename: Michael A
authors.initials: MA
authors.lastname: Brunsvold
mesh_terms: D000328:Adult; D016025:Bone Transplantation; D005260:Female; D006801:Humans; D007180:Incisor / Q000000981:diagnostic imaging / Q000601:surgery*; D008310:Malocclusion / Q000209:etiology / Q000503:physiopathology*; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery; D010508:Periodontal Abscess / Q000601:surgery*; D010514:Periodontal Pocket / Q000000981:diagnostic imaging / Q000601:surgery; D010518:Periodontitis / Q000150:complications / Q000628:therapy; D011859:Radiography; D012075:Remission, Spontaneous; D014085:Tooth Migration / Q000209:etiology; D019553:Tooth, Nonvital / Q000150:complications / Q000000981:diagnostic imaging