Bone regeneration in advanced periodontitis lesions after a single episode of root planing--case report with ten-years of follow-up.

This report describes a significant bone regeneration in a mandibular molar with advancing long-standing periodontal disease (defect extending to apex and into furcation) following a single episode of scaling and root planing. A 52-year-old female suffered from generalized moderate periodontitis for two years. An acute periodontal abscess with a 12 mm probing depth around the right mandibular first molar was noted. After incision and drainage, thorough scaling and root planing was performed under local anaesthesia. Three months later, radiographic examination showed complete bone regeneration with formation of a distinct lamina dura. It was concluded that favorable clinical and radiographic results could be obtained after a single episode of thorough subgingival root planing combined with excellent oral hygiene maintenance.