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Open Bite (Anterior (Treatment (Myofunctional or orthopedic therapy…

- - - - overgrowth/undergrowth of alveolar segments
      - Vertical growth pattern
      - Anticlockwise rotation of maxillary base
      - Divergent jaw bases
      - short ramus with long.short body, increased gonial anle
  - - - Long, narrow face, convex profile / Class III - concave
      - Short upper lip, excessive Mx incisors exposure
      - Increased lower AFH, decreased upper AFH
      - Steep MPA, clockwise rotation of Mb
      - Small mandibular body & ramus
      - Divergent jaw bases
      - Upward rotation of Mx jaw bases
    - - Proclined upper and lower anteriors
      - No overlap of upper and lower anteriors
      - Spacing
      - Narrow maxillary arch - lowered tongue posture
      - Tongue interposing between teeth
  - - - Prevent thumb sucking, tongue thrusting (habit breaker - removable/fixed crib)
      - Referring to otolaryngist - abnormal nasopharyngeal pathology
    - - Occipital headgear - intrude Mx posterior, rotates Mx clockwise
      - FR-IV / modified activator - skeletal anterior open bite in mixed dentition period
      - Vertical pull headgear with chin cup
    - - Fixed mechanical appliances with box elastics (mild to moderate dental open bite)
    - - Step-down of Mx and set-up of Mb (Skeletal)
- - - - Supernumerary teeth
      - Non resorbed retained roots of deciduous tooth
      - Lateral tongue thrust
    - - Ankylosed deciduous teeth - submerged teeth
  - - - Lateral tongue thrust - removable appliance with lateral tongue spikes
      - Infra-occlusion - vertical elastics
      - Ankylosed deciduous second molar - prosthetic crown