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A 17-year-old male patient with localized juvenile periodontitis was treated by subgingival instrumentation with full thickness flap on the lower molars, combined with a 3-week course of systemic tetracycline, and a programme of supervised oral hygiene. The treatment was rapidly followed by dramatic clinical and microbiological improvement. However, despite good oral hygiene, gingival inflammation recurred at regular intervals. It was necessary to maintain the clinical results by periodic subgingival instrumentation with an ultrasonic scaler. Healing of alveolar bone was monitored in the lower 1st molar regions over 3 years by using superimposable radiographs. Quantitative analysis of bone density performed with a high-resolution digitalisation technique showed a considerable improvement 1 year after therapy. However, continuous remodelling, probably related to variations in inflammation, occurred during the 3 postoperative years. [ABSTRACT FROM AUTHOR]

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This article informs about the forthcoming symposium "European Symposium on Borderland Between Caries and Periodontal Disease. Applications of Molecular Science." It will take place in Geneva, Switzerland, on January 25 and 26, 1990. The central theme of the symposium will be the applications of molecular science to the study of caries and periodontal disease. The article also presents the names of eminent speakers who are expected to participate in this symposium. It also provides contact address for acquiring further information about the symposium.