1. Correction of incorrect tooth positions:

• crowded or crooked teeth;
• fan teeth;
• spaces between teeth;
• closing, incorrect overlapping of teeth;

2. Correction of incorrect jaw positions:

• facial asymmetries;
• jaw too small or too large;
• double chin;
• disproportionate facial floors;
• small chin; short face;
• prominent masseters;

• erased cheekbones;
• accentuated facial envelopes or furrows;
• erased mandibular bone;
• too visible nostrils or inconspicuous;
• thin lips;
• disproportionate teeth;
• in smile;
• long and narrow face; prominent nose;

3. Correction of the upper respiratory tract:

• difficult nasal breathing;
• snoring;
• sleep apnea.