title: Relationship between extra-alveolar time and atopy in the prognosis of the replantation of avulsed teeth.
abstract: BACKGROUND
  The aim of this in vivo study was to evaluate the correlation between the occurrence of root resorption in avulsed and replanted teeth, extra-alveolar time, and the possible influence of Th2 immunologic profile, represented by patient's atopy and its influence in the prognosis of the tooth.
  
  
  METHODS
  This study evaluated the presence or absence of root resorption in 57 avulsed and replanted teeth. The replantation technique and endodontic treatments were performed following the International Association of Dental Trauma guidelines. Follow-up of the replanted teeth included monthly clinical and radiographic examinations during 1 year. The patient's medical examination, including the personal and family allergic history, in conjunction with the skin prick test based the evaluation of patient's atopy.
  
  
  RESULTS
  Of the 37 teeth of atopic patients, 33 (89.2%) teeth did not present root resorption. Of these, 27 (72.9%) had an extra-alveolar time of <1 hour and 6 (16.2%) had an extra-alveolar time >1 hour. Four (10.8%) teeth presented root resorption and an extra-alveolar period of time >1 hour.
  
  
  CONCLUSIONS
  These results showed the importance of the extra-alveolar time and the predominantly Th2 immunologic profile, represented by atopic patients, that suffered replantation after dental avulsion in a 1-year follow-up.
authors.affiliation: Department of Endontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil. lroskamp@gmail.com
authors.forename: Liliane
authors.initials: L
authors.lastname: Roskamp
authors.forename: Vânia D
authors.initials: VD
authors.lastname: Westphalen
authors.forename: Everdan
authors.initials: E
authors.lastname: Carneiro
authors.forename: Luiz F
authors.initials: LF
authors.lastname: Fariniuk
authors.forename: Ulisses X
authors.initials: UX
authors.lastname: Silva Neto
authors.forename: Fernando H
authors.initials: FH
authors.lastname: Westphalen
mesh_terms: D016009:Chi-Square Distribution; D006801:Humans; D011379:Prognosis; D011859:Radiography; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000276:immunology / Q000601:surgery; D012882:Skin Tests; D013997:Time Factors; D014084:Tooth Avulsion / Q000000981:diagnostic imaging / Q000276:immunology / Q000601:surgery*; D014090:Tooth Replantation / Q000379:methods*; D016896:Treatment Outcome