Retention of primary teeth beyond their expected exfoliation date is encountered relatively frequently. Most commonly this is due to absence of the permanent successor.
In this article patient assessment and the restorative treatment options are discussed with particular emphasis on retention of the primary tooth/teeth in the medium to long-term.
The restorative techniques that may be used to improve aesthetics and function of retained primary teeth are illustrated. Consideration of this minimally invasive approach is commended in such cases.
Introduction : Primary teeth may be retained for a variety of reasons, the most common being developmental absence of the permanent successor. While agenesis of primary teeth is rare (0.1-0.9%), absence of permanent teeth is encountered relatively frequently with a prevalence of 2.5-6.9%.
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Variations between racial groups have been noted as has a female predilection - a female: male ratio of 1.37:1 reported.
Various terms have been used to classify the number of missing permanent teeth. The absence of 1-5 teeth (except third molars) is described as ‘hypodontia’ while severe hypodontia or oligodontia is the absence of six or more teeth. Anodontia describes the complete absence of permanent teeth.
° BRITISH DENTAL JOURNAL VOLUME 207 NO. 7 OCT 10 2009
° S. Robinson and M. F. W-Y. Chan