Korean J Oral Maxillofac Radiol.  2001 Dec;31(4):205-207.

The relationship among reference lines used for taking the extraoral radiography

• Lee SM
• Choi HM

Abstract

PURPOSE: The aim of present study is to estimate the relationship among reference lines used for taking the extraoral radiography and panoramic radiography.
MATERIALS AND METHODS
Lateral cephalographs of 40 adults, aged 22 to 30 years were taken. Angles between reference lines (Frankfort line, canthomeatal line, infraorbitomeatal line, and occlusal plane) were measured.
RESULTS
Angles between Frankfort line and canthomeatal line, Frankfort line and infraorbitomeatal line, Frankfort line and occlusal plane, canthomeatal line and infraorbitomeatal line, canthomeatal line and occlusal plane, and infraorbitomeatal line and occlusal plane were 16.1degrees(+/-2.2), 5.8degrees(+/-2.4), 8.7degrees(+/-3.5), 10.3degrees(+/-1.3), 24.8degrees(+/-4.0), and 14.5degrees(+/-4.4), respectively.
CONCLUSION
Angle between frankfort and canthomeatal line is very different with commonly known angle. Frankfort horizontal reference lines used for panoramic radiography need an exact definition and more accurate standard is needed for the taking of panoramic radiograph

Keyword

cephalometry; radiography; radiography; panoramic

MeSH Terms

Adult
Cephalometry
Dental Occlusion
Humans
Radiography*
Radiography, Panoramic