Resorption of Root Apex during Orthodontic Tooth Intrusion Using Light and Heavy Forces

Abstract

Introduction, aim: The aim of this prospective study was to find a relationship between the external apical resorption and magnitude of orthodontic force during tooth intrusion. Relationship between the amount of intrusion and the extent of root resorption was investigated as well.

Conclusion: Heavy forces lead to a more extensive intrusion in comparison with light forces. Significant root length shortening occurs after the intrusion with both 50 cN and 150 cN force.

The relationship between the amount of intrusion force or the extent of intrusion and the apical root resorption was not confirmed.

Keywords

• intrusion
• light and heavy intrusion force
• apical root resorption
• premolar