Tweed’s Philosophy
Classify diagnostic aids in orthodontics. Describe in detail the uses of cephalometrics in orthodontic diagnosis. Add a note on Tweed’s triangle.
Answer.
Classification of Diagnostic Aids in Orthodontics
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Essential Diagnostic Aids
- Case selection
- Clinical examination
- Study models
- Certain radiographs:
- Periapical radiograph
- Bitewing
- Panoramic.
- Facial photographs
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Nonessential or Supplemental Diagnostic Aids
- Specialized radiographs:
- Cephalometric radiographs
- Occlusal intraoral films
- Selected lateral jaw view
- Cone shift technique.
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- Electromyographic examination of muscle activity.
- Hand and wrist radiographs to assess bone age.
- Endocrine tests.
- Estimation of basal metabolic rate.
- Diagnostic set-up.
- Occlusograms
- Sensitivity (Vitality) test
- Biopsy.
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