ortho the international C.E. magazine of orthodontics

I 09ortho3_2012 C.E. article_ Combination Technique I deep anterior overbite. This created initial bite open- ing and avoided shearing of brackets, tearing of bands and occlusal interferences. _Combination Technique mechanics StageI—Singlestrandlight-wirestage (Figs.9a–9c). The objectives of Stage I were to achieve: (a) reduction of the protrusion (edge-to-edge incisor relation),(b)biteopening(molaruprightingandinci- sor intrusion), (c) incisor uncrowding and (d) Class I cuspid and molar relationships. StageII—Levelingwithamulti-strandlight-wire stage(Figs.10a–10c). The objectives of Stage II were to achieve: (a) leveling and aligning of all brackets for edgewise archwire placement, (b) preliminary uprighting of cuspidsandbicuspids,(c)correctionofrotationsand labiolingual malpositions, (d) continued bite open- ing, and (e) arch symmetry. Theadvantagesofthemultiplelevelingappliance when compared to the single strand wire included a longer range of action, better resistance for distor- tion, increased flexibility, gentler forces and less fatigue. StageIII—Edgewisestage(Figs.11a-11c). The objectives of Stage III were to achieve: (a) a stable anchorage for Class II elastics, (b) correct axial inclinations, (c) root paralleling in extraction areas, (d) uprighting of the molars and bicuspids, (e) ideal arch form, (f) continued overbite correction and (f) Fig. 7h Fig. 7jFig. 7i Fig. 7e Fig. 7f Fig. 7g Fig. 8a Fig. 8cFig. 8b