a case report on the use of oral screen

1. ORAL SCREEN
DR.K.SRI.KAVYA
1ST YEAR PG
DEPT OF ORTHODONTICS

2. CONTENTS
 INTRODUCTION
 EQUILIBRIUM THEORY
 PRINCIPLE OF FUNCTIONAL APPLIANCE
 INDICATIONS OF ORAL SCREEN
 FABRICATION
 MANAGEMENT OF APPLIANCE
 MODIFICATIONS
 CONCLUSION
 REFERENCES

3. INTRODUCTION
 Simple.
 Versatile.
Uses:
 early interceptive treatment.
 malocclusions aggravated by faulty muscle function.

4. EQUILIBRIUM THEORY

5. PRINCIPLES OF FUNCTIONAL APPLIANCE
Type of force applied on periosteum :
 Force application
 Force elimination

6. ORAL SCREEN
 NEWELL (1912).
 Form: curved shield of acrylic placed in
labial vestibule.

7. INDICATIONS OF ORAL SCREEN
 Habit correcting appliance.
 To perform muscle exercises.
 Mild Class II malocclusion.
 Mildly proclined maxillary anterior
teeth.

8. CONTRAINDICATIONS
 Nasorespiratory distress.
 Mouth breathing due to nasal
obstruction.

9. MECHANISM OF ACTION
FORCE APPLICATION FORCE ELIMINATION
Contacts labial surface of Buccal musculature is shielded
proclined incisors. away from buccal aspect of
posteriors.
Perioral musculature force Lingual force acts on posteriors
is transferred
Retraction of incisors Expansion of arches

10.  Construction bite : moving the mandible forward within 1-3 mm, bite opened by 2mm
forward repositioning of mandible
correction of mild Class II, div I malocclusion

11. FABRICATION
Upper and lower casts are seated in normal intercuspation and sealed
using plaster of Paris.
Modelling wax is used as spacer adapted to labial and buccal surface of teeth
extended to depth of sulcus.
In case of proclined teeth window is cut to expose incisal 1/3rd of teeth.
Fabricated with heat cure / self cure

12. own work

14. MANAGEMENT OF APPLIANCE
 Wear the appliance full time at nights and a minimum of 3-4 hours during the daytime.
 The patient is asked to close the lips tightly when wearing the appliance to maintain a proper lip
seal.
 Frenal areas should be relived to avoid tissue irritation.

15. MODIFICATIONS
HOTZ MODIFICATION DOUBLE ORAL SCREEN

16. ORAL SCREEN WITH BREATHING HOLES REHAK MODIFICATION

17. KAR’s MODIFICATION ORAL SCREEN WITH TONGUE CRIB

18. CONCLUSION
 Establishes a better muscle balance between the tongue and buccinators
mechanism.
 Eliminates harmful or deleterious muscle forces (primary / secondary to habits)
and facilitates reestablishment of normal function.

19. REFERENCES
 Sudipta Kar Sudipta Kar’s Modification of Oral Screen. Euro J Pharma Research,
2015
 S Gowri Shankar, Textbook of Orthodontics 2nd edition
 Graber, Rakosi and Petrovic, Dentofacial Orthopaedics With Functional appliance
 Basavaraj Subhashchandra Phulari, Orthodontics Principles and Practice.