Cephalometrics in Orthodontics: Importance, Types, and Applications
Question 1. What is cephalometrics? Write about Steiner’s analysis in detail.
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What is cephalometrics? Describe Steiner’s analysis in detail.
Answer. Cephalo means head, and the metric means measurement.
Cephalometries is a radiography. “Cephalometric radiography is a standardized method of producing skull radiographs which are useful in making measurements of cranium and the orofacial complex.”
Question 2. What is Tweed’s analysis? Discuss the clinical considerations of Tweed’s diagnostic setup in planning orthodontic treatment.
Answer. Tweed’s analysis was based on the inclination of mandibular incisors to the basal bone and its association with the vertical relation of the mandible to cranium.
The mandibular incisors should be placed upright over basal bone for stability and esthetics.
Question 3. Write a short note on the gonial angle.
Answer. Gonial angle is a skeletal landmark for the determination of cephalometric analysis for functional appliances.
- Gonial angle is divided into two parts i.e. upper gonial angle and lower gonial angle when a line is drawn from nasion to gonion.
- Patient having acute or small gonial angle have a horizontal growth pattern.
- Acute gonial angle suggests that the condition is favorable for anterior positioning of mandible with the functional appliances.
- Patient having obtuse or large gonial angles, functional appliance treatment is contraindicated.
- Its mean value is 130° ± 7 degrees.
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