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Outline

Outline. • Orthodontic directions • Medical and dental history • Klinical examination • Model analysis • Angle diagnostic system. Extraoral examination. Orthodontic directions. Orthodontic directions Sagittal (mesial-distal) Vertical (deep bite, open bite)

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Outline

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  1. Outline • Orthodontic directions • Medical and dental history • Klinical examination • Model analysis • Angle diagnostic system

  2. Extraoral examination

  3. Orthodontic directions • Orthodontic directions • Sagittal (mesial-distal) • Vertical (deep bite, open bite) • Transversal (narrow)

  4. Angle Class I. Class I. Cuspid

  5. Angle II.

  6. Angle II/1 Overjet Distocclusion Deep bite 70-80 % Mouth breathing (often) Incomplett lip closure Acquired anomalies

  7. Distoocclusion Overbite (always) Retrusion of upper incisors

  8. Angle II./2 rendellenességek jellemzői • Hereditary anomaly • Excessive function of the upper lip • Pronounced sulcus mentolabialis (deep bite) • Nose breathing • „Forced distooclusion”

  9. Angle III – progenie - mesiocclusion

  10. CLASS III MALOCCLUSION LATE MIXED DENTITION CLASS III MALOCCLUSION ANTERIOR CROSSBITE

  11. CLASS III MALOCCLUSION DEEP OVERBITE MAXIMUM INTERCUSPATION

  12. Sceletal or dentoalveolar anomalies – Vertical anomalies Deep bite Open bite

  13. Deep bite

  14. The six keys of occlusion (by Andrews) are: • Molar inter-arch relationship • Mesio-distal crown angulation • Labio-lingual crown inclination • Absence of rotation • Tight contacts • Curve of spee

  15. Asymetricalforms By narrowing of the arches the lateral cusps forces the mandible to lateral direction Sceletal assimetry Angle subdivion - if the occlusion on the right side and left side are different

  16. III Class

  17. Tongue –thrust swallowing

  18. Lip-pressure swallowing

  19. Thumb sucking

  20. Consequences of thumb sucking • Open bite • Protrusion of upper incisors • Retrusion of lower incisors • - Distalocclusion

  21. Mouth breathingthe nasal cavity is usually (nasal gland, polyp etc.) Upper incisors are protruded Open bite Inflammated marginal gingiva

  22. Oral breathing Mouth breathing

  23. Deviation Maximum mouth opening

  24. Place analysis • The lower jaw is more important, because we are not able to increase the size of the mandible !!!

  25. Leeway space Theprimary molars are smaller than the premolars

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