Steps to Correct Class II Division I Malocclusion

The 1st step to correct severe Class II Division I malocclusion (Fig1) is extraction of 4 of the 1st bicuspids (Fig.2 X).  Following placement of 16x16 wires, start Class II retraction (Fig.3 red line) as well as distalization of U3 (Fig.4).  When canine Class I relation is established (Fig.5 horizontal arrow (using power chain between L3/5)), arch wire sequence should be able to intrude the incisors (vertical arrows).  Finally the lower 2nd bicuspid and molars are mesialized (Fig.6 arrow).

Return to Ortho Cases

Xin Wei, DDS, PhD, MS 1st edition 08/10/2018, last revision 10/28/2018