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The aim of this research was to evaluate the repair of class II furcation defects in dogs treated with the coronally positioned flap alone or in association with guided tissue regeneration and post extraction tissue graft using an immunohistochemical analysis. The defects were created on the lower jaw right and left 2, 3 and 4 premolars on four mongrel dogs. On the test side of each dog, after root instrumentation, the defects were grafted with a alveolar socket reparative tissue removed from five days healing teeth extraction sites. The surgical areas were covered with absorbable membranes and a coronally positionated flap was sutured. At the control side, after root instrumentation the coronally positionated flap was sutured. After 45 days, the dogs were sacrificed. The immunohistochemical analyses for osteonectin, osteopontin and bone sialoprotein were done on the bucal-lingual plane extent of the 3 premolars furcations. The immunohistochemical expressions were similar among the two groups showing that they probably were in a similar healing stage. Key-words: Furcation defects – Periodontal repair – Periodontics

Avaliação imuno-histoquímica de defeitos de furca classe II tratados pelo retalho deslocado coronariamente, associado ou não à regeneração tecidual guiada e enxerto de tecido reparativo de alvéolos