A study was undertaken to evaluate the long term results of root resections. Records of 100 patients who had undergone root resections 10 years prior to the study were reviewed. Although the immediate postoperative results were gratifying, they were not always lasting. Eighty-four per cent of the failures occurred after 5 years. Most failures were in the mandibular arch and derived from reasons other than inflammatory periodontal disease. Suggestions are made as to how to improve the prognosis of resected teeth.
A histological study of the site of a clinically successful bone graft revealed the presence of a downgrowing junctional epithelium between the root surface and the altered graft bone. No new cementum could be seen associated with the osseous autograft, nor was a functional periodontal ligament in evidence adjacent to the grafted bone. It is suggested that the presence of newly formed bone on surgical reentry following bone grafting in periodontal lesions does not necessarily imply that regeneration of the periodontium has occurred.
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