Cephalometrics Orthodontics Question And Answers

Cephalometrics

• A broad anatomic area can be visualized.
• Patients radiation exposure is low.
• It helps in orthodontic diagnosis by enabling the study of skeletal, dental and soft tissue structures of craniofacial region.
• It helps in treatment planning.
• It helps in evaluation of the treatment results by quantifying the changes brought about by treatment.
• It helps in predicting the growth related changes.
• By cephalometries the skeletal and dental abnormalities can be classified.

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• Give 2 dimensional view of three dimensional object.
• Reliability is not always accurate there can be errors in determining the landmarks.
• There are different methods of analyzing a cephalogram and so no standardization of analyze.
• Exposure of patient to ionizing radiation which is harmful to patient. So it can be used only when it is diagnostically and therapeutically needed.
• There is absence of the anatomical references which remains constant with the time. This is applicable when the clinician wishes to compare cephalograms which are taken at different time points.
• Measurement procedures in cephalometrics are not well standardized.
• Anatomical structures which lie at different planes within the head undergo projective displacement.
• Positioning of patient is done with ear rods in external acoustic meatus, in this way operator assumes that both the meatuses are symmetrical but this is need not to be so.
• Patient is asked to bite in maximum intercuspation at the time of taking cephalogram. There can be mandibular shift from the centric relation.
• Composition of lines and angles used in cephalometrics provide limited information about patient’s dento skeletal patterns.
• On basis of cephalometrics, orthodontic diagnosis cannot be made solely.