January 10, 2015
Since its introduction, several methods of cephalometric analysis have been proposed by experts in this field. Among the more commonly known and used are Steiner analysis, McNamara analysis, Ricketts analysis, Eastman analysis, Downs analysis and Tweeds analysis. No method can be called superior to the other.
The success of analysis lies in accurate marking of the landmarks, the planes and the construction of angles and arcs. Comparing the values arrived at with normal values helps to understand the pattern of the person’s skeletal structure. If the values arrived at are compared to the same person’s pre-treatment cephalogram, then the effect of the treatment can be assessed.
Cephalometric landmarks are specific structures, dental and skeletal, that can be easily recognized on a radiograph. Once the basic skeletal and the soft tissues outlines have been traced, the landmarks are penciled in. The main landmarks in a lateral cephalogram with their symbols are:
Landmarks are used as reference points to construct lines known as planes.