pedogogy on habits

2. THUMB SUCKING

3. contents
 Definition of habit
 Definition of thumb sucking
 Introduction
 Development of habit
 Classifications
 Theories related
 Etilogy
 Diagnosis
 management

4.  Habit can be defined as a fixed or constant practice established by
frequent repetition.
Dorland (1957)

5. THUMB/DIGIT SUCKING
 Placement of the thumb or one or more fingers in varying depths into the
mouth.
– Gellin-

6.  I.U Life
 First 2 yrs.
 Disappears with maturation.
 No: malocclusion
 Abnormal IF, persists
 IF not controlled at this age: May cause deleterious effects on dentofacial structures.

7. DEVELOPMENT OF HABIT

8. FEELING OF
euphoria,
sense of security,
warmth
being wanted.

9. 
normal/abnormal
Pscycological
Habitual
Nutritive
Non nutritive
Subtelny’s grading(1973)
1.Type A:- 50%
2.Type B :- 13-15%
3. Type C :- 18%
4. Type D :- 6%
classification

10. Theories related
Classical Freudian theory
Learning theory
Oral drive theory
Rooting reflex
Sucking reflex

11. ETIOLOGY

12. DENTOFACIAL CHANGES
1. Proclination of max incisor
2. Inc max arch length
3. Inc clinical crown length
of max incisor
4. High palatal arch
5. Atypical root resorption’
6. Inc trauma to max incisor
Retro man incisor
Retrusio of mandible

13. • Inc. overjet
• Dec. overbite
• Post.crossbite
• Ant.open bite
1. Development of tongue
thrust
2. Lower tongue position
3. Hypotonic upper lip
4. Hyperactive lower lip

14. management
 Preventive method
 Pscycological
 Reminder therapy
 mechanotherapy