SUPER
CALCULATOR
about this calculator
PURPOSE
Plan extraction patterns to address sagittal discrepancies & arch asymmetry at the same time.
HOW TO USE
1) Enter your diagnosis
The R and L sagittal discrepancies at the level of the first premolars in mm (Katz)
The Mx and Md arch asymmetry at the level of the first premolars in mm
2) Try different extraction patterns
Select different combinations of extractions
Anchorage is listed in brackets
Moderate - think powerchains
Absolute - think TADs
Watch the predicted residuals update in real time
3) Get the predicted residuals as close to 0 mm as possible
The residuals are calculated based on Creekmore’s rules of thumb for extraction space closure
Zeros across the board would indicate Class I with arch symmetry
REFERENCES
Special thanks to Dr. Bruno Vendittelli and Dr. Anthony Mair for teaching me the concepts that led to the creation of this calculator. Here are a few key references for Super Calculator. Click to see the original article.
Creekmore, 1997. Where teeth should be positioned in the face and jaws and how to get them there.
Katz, 1992. Angle classification revisited. 1: Is current use reliable?
Katz, 1992. Angle classification revisited 2: a modified Angle classification.
Rebellato, 1998. Asymmetric extractions used in the treatment of patients with asymmetries.
Janson, 2003. Class II subdivision treatment success rate with symmetric and asymmetric extraction protocols.
Janson, 2016. Efficiency of Class II subdivision malocclusion treatment with 3 and 4 premolar extractions.
EXAMPLE
Scroll down for an example video!
DISCLAIMER
The information provided is intended solely for informational and educational purposes for licensed dental professionals. The orthodontic calculators, while based on evidence from reputable orthodontic literature as well as clinical experience, are tools designed to assist clinical decision-making. They are not intended to make final treatment decisions. Do not take the outputs from these calculators at face value; they are meant to complement, not replace, professional judgment and critical thinking.
These calculators are generalized and not customized for any specific patient case. It remains the responsibility of the treating orthodontist or dentist to thoroughly assess and tailor care to each patient’s individual needs. By using this tool, you acknowledge that the ultimate responsibility for patient care lies with the treating clinician. Ortho Calculator Inc. will not be held liable for any risks, complications, or outcomes associated with acting on the information provided by this website.
The ortho calculators are not intended for use by the general public. If you are not a licensed dental professional, please refrain from using or relying on the calculators or content provided here. By using the Ortho Calculators, you acknowledge and agree to the terms outlined in this disclaimer.