Abstract:

Orthodontic extrusion is an important technical means for the preservation and treatment of crown-root fracture teeth, especially in the treatment of anterior tooth trauma. Combining with multidisciplinary treatment, the subgingival segment can be pulled to be supra-crestal through orthodontic extrusion. The patient′s function can be restored to the greatest extent and the aesthetics can be improved. However, the current orthodontic traction lacks predictability and accurate traction indicators, so that patients need to be partially edentulous for 3-6 months, which greatly affects the physical and mental health of patients after injury. In this study, a series of treatments such as accurately setting the traction target position, making a guide plate to accurately implement traction, and closely linking repair therapy were used to improve the predictability of the overall treatment and increase the success rate of treatment.

Key words: Crown root fracture tooth, Digital technology, Orthodontic extrusion