Palatal Plane is defined by which landmarks?

Palatal Plane is defined by which landmarks?

• A. Sella and Nasion
• B. PNS and Sella
• C. ANS and Nasion
• D. PNS and ANS

Answer: (D)

Palatal Plane is defined by the line joining the anterior nasal spine and the posterior nasal spine. These two landmarks are located at the front and rear edges of the hard palate, so the ANS–PNS line represents the orientation of the palate itself. This plane serves as a reference in cephalometrics to assess maxillary position and vertical relationships to the cranial base. In contrast, lines that use Sella or Nasion define cranial base references (like Sella–Nasion) and do not represent the palate, and lines combining PNS with Sella or ANS with Nasion do not describe the palatal plane.

Palatal Plane is defined by the line joining the anterior nasal spine and the posterior nasal spine. These two landmarks are located at the front and rear edges of the hard palate, so the ANS–PNS line represents the orientation of the palate itself. This plane serves as a reference in cephalometrics to assess maxillary position and vertical relationships to the cranial base. In contrast, lines that use Sella or Nasion define cranial base references (like Sella–Nasion) and do not represent the palate, and lines combining PNS with Sella or ANS with Nasion do not describe the palatal plane.