## Lateral Analysis Section

Q: Can the user define the landmarks for cephalometric analysis and the model analysis in an arbitrary fashion?
A: No, the user must follow the landmark positioning process step-by-step.
Q: Does the user need to position extra landmarks for Sassouni Archial Analysis?
A: Yes, the user needs an extra 11 landmarks in addition to the 42 lateral cephalometric landmarks since some Sassouni Achial landmarks including the points do not exist in the 42 lateral cephalometric landmarks to define the arc center.
Q: Is the user able to save the Sassouni Archial Analysis?
A: No, the user can only printout the Sassouni Archial Analysis data.
Q: How can the user perform perpendicular measurements?
A: The user can define the first and second points as a base and the third point as the peak for perpendicular distance measurements.
Q: How is three-point angular measurement performed?
A: The user can define the first and second points as a base and the third point as the peak for perpendicular distance measurements.???????
Q: How is 4-point angular measurement performed?
A: The user can define the first and second points as the part of the first angular arm while the second and fourth landmarks define the second angular arm of the angle to be measured.
Q: For cephalometric analysis, can any forms other than trace lines and numerical analysis results display cephalometric analysis result?
A: The analysis result can be shown as a polygraph showing the difference between the actual result and the standard value in the Standard Deviation unit along with the checked results in the checkboxes. For the case of PA analysis, the result will be shown as graphs of different distances in different vertical lines since no standard values exist along with the standard deviation for PA analysis.
Q: Any difference between 79-point lateral cephalometric analysis vs. 42-point lateral cephalometric analysis?
A: The differences between the 79-point lateral cephalometric analysis and the 42-point lateral cephalometric analysis can be described as the table with O as “available” while X as “ not availalble ”.

Lateral Cephalometric Analysis 79-point 42-point
Mahidol Analysis o x
Down Analysis o o
Steiner Analysis o o
Tweed Analysis o o
Jarabak Analysis o o
Rickett Analysis o x
McNamara Analysis o o
Harvold Analysis o o
ABO Analysis o x
Chula Analysis o x
Chiang Mai Analysis o x
Songkla Analysis o x
Songkla Orthognathic Analysis o x
Khon Kaen Analysis o x
Sassouni Archial Analysis x o
Q: How can the user normalize lateral and frontal radiographic images before entering the relative distance values to ensure that the results from calculation are not different than measurement by manual method?
A: The user can select the position around the scale or the area where the distance is known for certain before normalization by defining the relative distance. For cephalograms, either the scale area or the area marked with the letter “R” is for normalization. If neither the scale nor the letter “R” is available, the alternative is the area showing the patient name.
Q: There are the case of a big overshoot when I make a measurement of the overjet and overbite while using the 42-point lateral cephalometric analysis module. How can I deal with such a problem?
A: In such a case of overjet and overbite measurements, the user should use the 79-point lateral cephalometric analysis module instead.