Table 2.

Reference points, lines, and planes used in the morphometric analysis of condyle position

	Description
Reference points, lines, and planes
Cs	The highest point of the condyle in the sagittal view
GI	Point of greatest concavity of the glenoid fossa
Cp	Most convex point on the posterior face of the condyle
PI	Line perpendicular to the Frankfurt plane passing through the midpoint of the sagittal diameter of the external auditory canal
Ca	Point on the anterior wall of the condyle closest to the posterior wall of the articular eminence
EI	Point on the posterior wall of the articular eminence closest to the anterior wall of the condyle
E-E′	Line tangential to the posterior wall of the articular eminence
Fh′	Line parallel to the Frankfurt plane passing through the lower edge of the articular eminence
Distancesa
Cs-GI	Upper distance from the highest part of the condyle to the deepest part of the glenoid fossa
Cp-PI	Posterior distance from the most convex part of the posterior wall of the condyle to line PI
Ca-EI	Anterior distance joining the most convex point on the anterior wall of the condyle with point EI
E-E′.Fh′	Angle between the tangent passing through the posterior wall of the articular eminence and the Fh′ plane parallel to the Frankfurt plane
GI-Fh	Height of the eminence from the deepest part of the glenoid fossa to the Fh′ plane parallel to the Frankfurt plane

^aUsed for measuring the superior, posterior, and anterior relationships between the condyle and the glenoid fossa.