Cephalometric landmarks
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Transcript of Cephalometric landmarks
GOOD MORNING
Dr Tony Pious
CEPHALOMETRIC LANDMARKS
CONTENTS
Introduction Requirements Hard tissue landmarks Soft tissue landmarks Horizontal planes Vertical planes
INTRODUCTION
cephalometric landmarks are readily recognizable points on a cephalometric radiograph or tracing, representing certain hard or soft tissue anatomical structures (anatomical landmarks) & (constructed landmarks).
REQUIREMENTS
Should be easily seen on the roentgenogram,
Be uniform in out line, and easily reproducible.
Should have significant relationship to the vectors of growth.
Should permit valid quantitative measurements of lines and angles projected from them.
Measurements should be amenable to statistical analyses.
HARD TISSUE LANDMARKSNasionOrbitalePorion Sella Point APoint BBasion
Anterior Nasal SpineGonionPogonion Menton Gnathion ArticulareCondylion ProsthionInfradentale
Posterior Nasal
SpinePtm Point
SOFT TISSUE LANDMARKSGlabellaNasion Soft tissuePronasale SubnasaleLabrale Superius
Stomion SuperiusSuperior Labial Sulcus
Stomion InferiusStomion Labrale InferiusInferior Labial
SulcusPogonion Soft
TissueMenton soft tissue
These lines are obtained by connecting two landmarks.
Based on their orientation the lines or planes can be classified into horizontal and vertical.
LINES AND PLANES IN CEPHALOMATRICS
HORIZONTAL PLANE• Sella-Nasion plane
(S.N)
• Frankfort Horizontal
plane
• Occlusal plane
• Palatal plane
• Mandibular plane
• Basion – Nasion plane
VERTICAL PLANE
• A – Pog line
• Facial plane
• Facial axis
• Esthetic plane (E-
plane)
THANK YOU