Question

In the Proffit and Ackerman classification of malocclusion, circles labeled 3, 4, and 5 correspond to which planes of space?

• A. Transverse, sagittal, vertical
• B. Sagittal, transverse, vertical
• C. Vertical, sagittal, transverse
• D. Vertical, transverse, sagittal

Hint:

Orthodontic discrepancies are evaluated in three planes: Transverse (width), Sagittal (AP), and Vertical (height).

Answer 1

The Correct Option is A

Step 1: Understanding Proffit and Ackerman Classification.
The Proffit and Ackerman system classifies malocclusion in five major characteristicsThese include alignment, profile, transverse, sagittal, and vertical discrepanciesThe system evaluates malocclusion in three planes of space
Step 2: Planes of Space in Orthodontics.
Orthodontic problems are analyzed in:
Transverse plane (width discrepancies such as crossbite)
Sagittal plane (anteroposterior discrepancies such as Class II or Class III malocclusion)
Vertical plane (open bite or deep bite problems)
Step 3: Correlation of Circles 3, 4, and 5.
In the Proffit and Ackerman diagram:
Circle 3 represents transverse problems
Circle 4 represents sagittal problems
Circle 5 represents vertical problems
Thus, the correct sequence is transverse, sagittal, vertical
Step 4: Conclusion.
Therefore, circles 3, 4, and 5 correspond to transverse, sagittal, and vertical planes respectively