Performing Treatments and Analyses > Superimposing Tracings

Understanding Standard Board Superimpositions

The three Standard  Board superimpositions are used to describe facial changes in the:

• Craniofacial

• Mandibular

• Maxillary

Original or pre-treatment tracings are displayed in black, interim tracings are displayed in blue, and post treatment tracings are displayed in red.

The standard American Board of Orthodontics (ABO) Analyses are as follows:

• SNAMeasures the angle between Sella, Nasion, and A Point.

• SNBMeasures the angel between Sella, Nasion, and B Point.

• ANBMeasures the difference between SNA and SNB.  

• SN-MPMeasures the angle between Sella-Nasion line and the Mandibular plane.

• FMAMeasures the angle between the Constructed Gonion-Constructed Gnathion line and the Frankfort Horizontal line.

• 1 to SNMeasures the angle between the Sella-Nasion line and the upper incisor.

• 1 to MPMeasures the angle between the mandibular plane and the lower incisor.

• 1 to NAMeasures the horizontal distance from the upper incisor tip to the Nasion-A Point line.

• 1 to NBMeasures the horizontal distance from the Lower Incisor Tip to the N-B Point line.

• E-PlaneMeasures the shortest distance from the E Plane to the lower tip.

• OverjetMeasures the horizontal distance between the Upper and Lower Incisor Tips.  There is no drawing associated with this measurement.

• OverbiteMeasures the vertical distance between the Lower and Upper Incisor Tips.  There is no drawing associated with this measurement.

You can access the following additional ABO superimpositions from the Standard Board Superimpositions (with Occipital) menu option:

• Occipital Template Structure

• Lateral Key Ridge

• Internal Architecture of Maxilla

• Internal Symphysis

• Mandibular Canal

• Sphenoidale Template

• Standard Size Incisors and Molars

• You cannot display superimpositions on top of the x-ray image or photo image. Only a set portion of the tracing is displayed for each.

Related Topics

Superimposing Tracings

Understanding the Standard Superimpositions

Creating a Superimposition

Printing Superimpositions