Endodontic and periodontal problems, such as surgical complications, often place before the professional the dilemma of choosing between tooth preservation and extraction. Correctly performed root planing usually leads to soft-tissue recession. In cases of tooth mobility, periodontal surgery can improve the situation only in the short term. Tooth loss eventually follows after some months or years, not to mention the aesthetic disadvantages of flap elevation and tissue excision after periodontal surgical treatment. Similar outcomes are predicted for teeth following endodontic treatment, particularly if they show complications or have undergone root resection. The combination of endodontic and periodontal problems, as with periodontal-endodontic lesions, endangers the tooth, as well as the bone and the anatomy of the jaw. Lesions such as these can result in severe defects, hampering any subsequent treatment with prostheses.1
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