Abstract: A comparison of ?tip-edge?plus and MBT techniques in adult ClassⅡ1 orthodontic treatment [Abstract] Objective ：To compare the outcomes of class II Division 1 patients with Tip-Edge plus and MBT straight wire technique.Methods ：Forty Class II malocclusion patients with four first premolars extracted were recruited. The experimental group used Tip-Edge plus appliance, the control group was treated with MBT straight wire appliance with anchorages. Computerized cephalometric analysis was carried out．Paired t tests and Student’S t-tests were performed．Results： (1) the experimental group and the use of medium anchorage control group achieved similar to the soft and hard tissue effect, two groups of upper molar amount of no statistical difference in the experimental group after the treatment of the lower incisors and the lip inclination than the control group. (2) the experimental group took 3.8 months to open bite average , the average number of return visits were 16 times; the control group took 6.3 months to open bite, and the average number of return visits were 22 times, the difference was statistically significant (P < 0.05). Conclusions: the tip edge plus technology and MBT straight wire arch technique for correction of adult class II Division 1 malocclusion achieved similar to the soft and hard tissue effect, the same anchorage effect, but the tip edge plus technology bite opening time is short, can significantly reduce the number of follow-up.

Key words: [Key words] Tip-Edge plus technology, MBT straight wire technique, Class II Division 1 malocclusion