Abstract
Backgrounds and objectives: The incidence of mandibular third molar impaction has been reported to be between 18% and 59%. In 2000, their surgical removal was reported to cost the NHS in excess of £12 million per year. The most common and significant variable for impacted third molars is that of inadequate space in the retromolar region. Space for successful eruption of third molars can be provided by extraction of the second molar. This has previously been demonstrated by orthodontic research. The aim of this study is to determine how successfully the third molar can replace an extracted second molar in the developing dentition.
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