Violation
The Frankfort-horizontal is a reference plane constructed by joining which of the following landmarks?
Porion and nasion
Porion and orbitale.
Porion and sella
Nasion and sella.
The Frankfort-horizontal is a reference plane constructed by joining which of the following landmarks?
Porion and nasion
Porion and orbitale.
Porion and sella
Nasion and sella.