Title : Simultaneous intrusion and retraction of maxillary incisors using skeletal anchorage
The increased rate of orthodontic patients complaining of severe crowding has made extraction an inevitable tool for providing spaces for leveling and alignment of the dental arches. Retraction of the anterior teeth has been done using different protocols and mechanics which in turn have their pros and cons. One of the most challenging situations is the retraction of severely proclined maxillary incisors. Many attempts have been made to overcome the side effects of retracting such incisors with conventional mechanics ex; root fenestrations, extrusion, root resorption, and anchorage loss. Our research provided a new technique to overcome such side effects and was published in the International Orthodontics 2022 Mar;20(1). The results showed that the center of resistance (CRE) of the four maxillary incisors was retracted 2.38 ± 0.77 mm and intruded 2.76 ± 1.0 mm with a mean change in axial inclination of 9.76 ± 3.45°. The mean amount of root resorption of the four incisors was 1.29 ± 0.59 mm over a mean period of 6.2 months. We can conclude that the mini-implant-supported 3-piece Burstone base arch had a pronounced effect on SIR of flared maxillary incisors with a clinically insignificant amount of root resorption.