Endodontic-orthodontic combined treatment for anterior teeth with crown-root fracture

Objective To observe the clinical efficacy of endodontic-orthodontic combined treatment for anterior teeth with crown-root fracture.Methods 21 anterior teeth with crown-root fracture were selected.After complete root canal therapy had been finished,orthodontic extrusion exerted a force along the root axis of the tooth to achieve the ideal condition of post crown,then surgical crown lengthening and restoration were done.Results 2mm～5mm extrusion were seen in 21 teeth,with 4～8weeks taken in average;three years later,the relative position of some teeth or gingivae had a little change and root apices of all teeth were normal.Conclusion The combination of endodontic-orthodontic treatment is an effective choice of restoration additionally used for anterior teeth with crown-root fracture.When the patient is under 18 years old,the period of retention should be longer and temporary crown is needed.