ORTHODONTICS

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Habit

Habit is an autonomic response to a situation acquired normally as the result of repetition & learning, strictly applicable only to motor response. At each repetition the act become less conscious & can lead on to a unconscious habit.

 

Classification of Habits

By Graber: Included under Extrinsic factors of general causes of Malocclusion

  • Thumb Sucking
  • Tongue Thrusting
  • Lip/nail Biting
  • Mouth breathing
  • Speech Defects
  • Postural defects
  • Abnormal Swallow
  • Psycogenic Habits – Bruxism
  • Defective Occlusal Habit

Development of a Habit

A new born instictively develops certain habits essential for his survival in the state of neuromuscular immaturity.

Digit/Thumb Sucking Habit

Moyers:- Repeated & forceful sucking of thumb with associated strong buccal & lip contractions.

Classification of Thumb Sucking

By Subtleny et al (1973)

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