How many facial planes should be assessed for symmetry?

Assessing facial symmetry is a critical aspect of orthodontic evaluation, and the standard practice involves examining three distinct facial planes. These planes include the vertical plane, the horizontal plane, and the sagittal plane.

The vertical plane generally divides the face into left and right halves, allowing for the assessment of lateral facial symmetry. The horizontal plane assesses the positioning of facial features in terms of up-down alignment, ensuring that the eyes, nose, and mouth are proportionately aligned from a horizontal perspective. Lastly, the sagittal plane is crucial for evaluating the anterior-posterior relationships of different facial structures, ensuring that the profile is balanced and harmonious.

By analyzing these three planes, orthodontists can accurately determine any asymmetries that may exist and develop treatment plans that address these issues, leading to a well-proportioned and aesthetically pleasing facial profile.