Relationship between extra-alveolar time and atopy in the prognosis of the replantation of avulsed teeth.

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. CONCLUSION: 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.

The influence of atopy in the prognosis of the replantation of avulsed teeth.

BACKGROUND: Replantation is the most indicated procedure for traumatic dental avulsion, but it invariably results in a greater or lower degree of root resorption. The outcomes of these cases can be affected by some well-known factors. Because studies have shown the importance of the innate and acquired immune response in the mechanisms involved in the resorption of bone tissues, an endeavor was made to verify if such an influence applies to dental resorption. METHODS: Fifty-seven avulsed, endodontically treated teeth were assessed in the Endodontics Clinic, Pontifical Catholic University of Paraná. Follow-up of the replanted teeth included periodical clinical examinations and radiographs, in accordance with the control rules of the International Association of Dental Traumatology. The evaluation of atopy was based on the patient's personal and family history in conjunction with the skin-prick test for five allergen extracts. RESULTS: Of the 46 teeth with a favorable outcome, 33 (71.74%) were in atopic patients, and 13 (28.26%) were in non-atopic patients. Of the 11 teeth with an unfavorable outcome, four (36.36%) were in atopic patients, and seven (63.64%) were in non-atopic patients; a greater prevalence of unfavorable prognoses occurred in non-atopic patients. CONCLUSION: The outcome after 1 year for avulsed and replanted teeth is more favorable in atopic patients.