SKULL POSITIONING LINES

Skull

It is a line between the glabella and EAM

Glabellomeatal Line (GML)

• Frequently used positioning line located between outer canthus and the EAM.

• Also called the RADIOGRAPHIC BASE LINE.

Orbitomeatal Line (OML)

• Reids base line

• Line of Frankfurt

• Anthropological base line

• Base line of the cranium

• It is a line which connects the infra-orbital point to the EAM

Infraorbitomeatal Line (IOML)

There is how much approximate average angle difference between the OML and GML

8°

There is how much average difference between the angles of the OML and IOML

7°

There is an average difference between the angles of the IOML and AML

15°

It is a line between the acanthion and EAM

Acanthiomeatal Line (AML)

It joins the center of the two orbits or pupils

Interpupillary Line (IPL)

It is a line between the mental point (mandible) and EAM

Mentomeatal Line (MML)

It is a line between the junctions of the lips to the EAM.

Lips to Meatal Line (LML)

Connects the glabella to a point at the anterior aspect of the alveolar process of the maxilla.

Glabelloalveolar Line

It is perpendicular to the anthropological base line and passes through the EAM

Auricular Line