Orthognathic Surgery Impact Calculator

Predict soft tissue changes and airway impact from planned jaw surgery movements (Le Fort I, BSSO, genioplasty).

Maxillary Advancement (mm)

Maxillary Impaction (mm)

Mandibular Advancement (mm)

Genioplasty AP Movement (mm)

Genioplasty Vertical Change (mm)

Pre-Surgical ANB Angle (deg)

deg

Tab to move between fields

Upper Lip Change (mm)

Lower Lip Change (mm)0

Soft Tissue Chin Change (mm)0

Posterior Airway Change (mm)0

Predicted Post-Surgical ANB (deg)5

Total Lower Profile Change (mm)0

Expected Recovery (weeks)0

Nasal Base Change0

Nasal Tip Change0

Upper Lip Impaction0

Soft Tissue B Change0

Chin Vertical Change0

Surgery TypeNo surgical movement planned

How to Use This Calculator

Enter planned maxillary and mandibular movement amounts (mm) in all three dimensions.
Enter genioplasty advancement or reduction (mm) if planned.
Read soft tissue response predictions using established hard-to-soft-tissue ratios.
Review profile change predictions to use in patient consultation and informed consent.
Compare surgical prediction to VTO (visual treatment objective) for treatment plan verification.

What each input means

Maxillary Advancement (mm): Positive = advancement, negative = setback. Le Fort I movement.
Maxillary Impaction (mm): Positive = superior impaction (shortening), negative = inferior repositioning.
Mandibular Advancement (mm): Positive = advancement, negative = setback. BSSO movement.
Genioplasty AP Movement (mm): Positive = chin advancement, negative = setback.
Genioplasty Vertical Change (mm): Positive = vertical reduction, negative = lengthening.
Pre-Surgical ANB Angle (deg): Current ANB angle before surgery.

Upper Lip Change (mm): Predicted upper lip anteroposterior change.
Lower Lip Change (mm): Predicted lower lip anteroposterior change.
Soft Tissue Chin Change (mm): Predicted chin point soft tissue movement.
Posterior Airway Change (mm): Estimated posterior airway space change.
Predicted Post-Surgical ANB (deg): Estimated ANB angle after surgery.
Total Lower Profile Change (mm): Combined lower lip and chin profile change.
Expected Recovery (weeks): Estimated initial recovery period in weeks.

Identify Input Parameters
4 parameters
Maxillary Advancement (mm) = 0, Maxillary Impaction (mm) = 0, Mandibular Advancement (mm) = 0, Genioplasty AP Movement (mm) = 0 = 6 input(s) provided
Calculate Upper Lip Change
Upper Lip Change
0 = 0
Calculate Lower Lip Change
Lower Lip Change
0 = 0
Calculate Soft Tissue Chin Change
Soft Tissue Chin Change
0 = 0