1. Removable orthodontic appliances

2. Used for correction of different orthodontic defects  Defects of bite - open bite - crossbite - under bite  Defects of individual teeth - rotation - protrusion, retrusion -crowding

3.  Removabe orthodontic appliances are composed of acrylic body and clasps  The clasps are twisted of wire by special pliers (bird beak, cutter)

4. The double helical spring  Made of 0.5 mm wire  Double helical spring is maximizing the elasticity of the protrusion spring

5.  The double helical spring ( Z-spring) is usualy used on rotated incisors  The spring is located on the tooth neck  The right sided and left sided z springs are fabricated accordingly

6. The Adams clasp  0,7 mm stainless steel wire  Adams clasp is used as anchorage of the appliance  Usualy situated on molars

7. Twisting of Adams clasp 1st step

8. 2nd step

9. 3rd step

10. The Adams clasps on the upper jaw

11. The Adams clasps on the lower jaw

12. No contact with palate

13. The ball clasps  0,7 mm wire  Used as anchorage of the removable appliances  Situated on incisors or in between premolars

14. The ball clasp on the upper jaw

15. No contact with palate

16. The ball clasp on the lower jaw

17. The labial bow  Made of 0,7 mm wire  Used for harmonic alignment of the anterior segment

18. The labial bow is situated is composed of three parts:  Horizontal bow portion  „U“ loops  Retentive arms The bow is situated between the canines

19. The labial bow on the upper jaw

20. The labial bow on the lower jaw

21. Example of another modification of the labial bow

22. The upper jaw with all retentive clasps

24. The lower jaw with all retentive clasps

26.  All clasps are fixed on models by wax

27.  Before the application of acrylic models have to be put into the water isolation

28. Application of acrylic  After choosing of the color we can start with application of acrylic  We change application of powder and liquid untill we have appropriate shape of the appliance

29. Orange liquidRed liquid Acrylic powder

30.  The poymerization proceeds in the polymerization unit (10 min,55°C, 3-3,5 bar)

31.  Polymerized applicances are machined by milling frases.

32. Instruments to produce an orthodontic appliance rubber Separating disc

33. Machined appliance before polyshing

34. Polyshing

35. The upper jaw

36. The lower jaw