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[Long term results of overdentures].

This article describes the long term results of overdenture therapy. The main goal--prevention of alveolar bone loss--appears to be achieved. Without preventive measures caries and periodontal diseases are frequently found. With the use of fluoride, possibly combined with chlorhexidine, and an optimal oral hygiene the prognosis is good. Taking these results into account the preservation of (roots of) teeth is highly recommended in the scope of preventive prosthodontics.