title: Immediate temporization crown lengthening.
abstract: BACKGROUND
  The biologic width provides a tight seal around the tooth, protecting the periodontium from microbial injury and promoting periodontal health. However, clinical situations such as subgingival caries and crown-root fracture may compromise the biologic width dimension. Crown lengthening is a surgical technique that can be used to re-establish this important landmark in order to maintain periodontal health and long-term stability of the restorations.
  
  
  METHODS
  A full-thickness mucoperiosteal flap is elevated to expose the bone and root surfaces. Debridement of the bone and root surfaces is completed and the crown preparation finalized, ensuring that at least 3 mm is between the restorative margin and alveolar bone crest. This guarantees preservation of the biologic width. The crown preparation is subsequently provisionalized to protect the tooth structure and promote soft-tissue healing.
  
  
  RESULTS
  Using the immediate temporization crown-lengthening (ITCL) technique, the crown preparation is finalized and impressions can be obtained during the surgical phase. This not only shortens the patient visits but also allows for the fabrication of a restoration of a good fit. The patient also receives a provisional restoration, which provides protection of the tooth structure and restores function and esthetics during healing.
  
  
  CONCLUSIONS
  ITCL is a simple, straightforward, and predictable approach that can be easily incorporated into the daily practice of many dentists.
authors.affiliation: Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA.
authors.forename: Shih-Chang
authors.initials: SC
authors.lastname: Tseng
authors.forename: Jia Hui
authors.initials: JH
authors.lastname: Fu
authors.forename: Hom-Lay
authors.initials: HL
authors.lastname: Wang
mesh_terms: D000541:Alveolectomy; D003238:Connective Tissue / Q000033:anatomy & histology; D016556:Crown Lengthening / Q000379:methods*; D003731:Dental Caries / Q000601:surgery; D003794:Dental Restoration, Temporary; D004846:Epithelial Attachment / Q000033:anatomy & histology; D005260:Female; D005881:Gingiva / Q000033:anatomy & histology; D005890:Gingivectomy; D006801:Humans; D008875:Middle Aged; D013524:Surgical Flaps