Abstract
A study of sixty teeth from children 10 to 13 years of age reveals that marked changes may occur in the dentine and pulp as a result of tooth intrusion with continuously acting forces. The pulp reactions were most manifest in teeth in which the apical area was complete. Alterations in apical anatomy were found only in teeth in which the root was not complete, while resorption defects were noted in most teeth in the experimental material. The changes were most marked in teeth subjected to large forces, but no definite limit of tolerance can be established on the basis of these investigations. Some of the alterations noted were of a permanent nature, while others were considered to be at least partly resolvable following removal of the intrusive force.
Published Version
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