Resumo

AZAMBUJA, Henrique Voltolini de; PURICELLI, Edela  e  PONZONI, Deise. Evaluation of the application of a permanent buried magnetic field in area of bone allograft and dentoalveolar- experimental study in rats. RFO UPF [online]. 2011, vol.16, n.2, pp. 187-192. ISSN 1413-4012.

ABSTRACT Objective: the objective of this paper is to provide a descriptive histological analysis of the use of a buried, static and permanent magnetic field in lyophilized bone allografts in a dentoalveolar area associated with surgical defects in rat mandibles. A randomized in vivo experimental study was achieved with 21 male Wistar rats (Rattus norvegicus albinus), which were divided into three groups, corresponding to 7, 21 and 45 experimental days. Ostectomies associated with odontotomies were performed on the outer lateral face of the mandibular body and in the ascending branch, cross-sectionally to the root of the lower incisor and to the molar apices. This surgical defect allowed the use of magnetized (test group) and non-magnetized (control group) metal devices associated with molar apices and distal stump of the lower incisor, where the lyophilized bone allograft was performed. The intensity of the buried and permanent magnetic field mas 250 gauss. In the test and control groups, there was gradual integration of the lyophilized bone allograft, maintenance of pulp vitality of the molars and proximal stump of the lower incisor, in addition to continuous eruption of the lower incisor. In the test groups, especially at 45 days, there was distinct and pronounced centripetal new bone formation towards the magnetized metal devices. In conclusion, the in vivo buried magnetic field favored bone healing at the site of the surgical defect.

Palavras-chave : Oral and maxillofacial surgery.; Static magnetic field.; Alveolar wound healing.; Lyophilized bone allograft..