›› 2020, Vol. 40 ›› Issue (3): 209-214.

• Clinical Research • Previous Articles     Next Articles

Clinical study of two methods for the treatment of Class Ⅱ division 2 of different ages

  

  • Received:2019-09-02 Revised:2019-11-05 Online:2020-03-28 Published:2020-03-31

Abstract: Objective To study the clinical efficacy of maxillary incisors in adolescents and adults with Class Ⅱ division 2 using two different methods. Methods 41 patients with Class Ⅱ division 2 were selected and divided into adolescent group(A) and adult group(B) according to age. Each group was randomly divided into two groups respectively using the miniscrew and reverse-curve archwire to protrude and intrude the maxillary incisors. Cone-beam Computed Tomograph (CBCT) was taken before and after treatment, and changes of the position of the maxillary anterior teeth and the alveolar bone were measured and analyzed. Results All 41 patients achieved normal overbite and overjet. The maxillary incisors have different degrees of inclination and intrusion(P <0.05;A1>A2,P >0.05;B1>B2,P <0.05); as was the intrusion of superior prosthion(P <0.05;A1>A2,P <0.01;B1>B2,P <0.05). The measurements of the b3 showed an increase in bone thickness(P <0.05). The measurements of the p2 and the p3 showed a decrease in bone thickness(P <0.05). There were no significant differences between different ages. Conclusion The implant anchorage can effectively correct the retroclined maxillary incisors of Class Ⅱ division 2 and achieve the genuine intrusion. There was no significant difference in the change of maxillary incisors between adolescents and adults.

Key words: Class Ⅱ division 2 , Micro-implant , protrusion , intrusion

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