Retention

1. Retention 1. Definition: Theholding of teeth which had been moved at orthodontic treatment in ideal esthetic and functional positions.

2. Retention Orthodontic treatment Active treatment Retention

3. Retention When the appliances are removed, an important stage lies ahead. That is Retention.

5. Retention 2.Why is retention necessary ?

6. Why is retention necessary 1. The balance of muscle forces of Oral-Maxilla system have not been achieved.

7. Why is retention necessary 2. Reorganization of the Periodontal and Gingival tissues.

8. Why is retention necessary 3. Occlusion balance has not been established.

9. Why is retention necessary 4. Oral habits have not been corrected.

10. Why is retention necessary 5. Occlusion changes related to growth.

11. Retention 3. Planning of Retention: • Essentially full-time for the first 3 to 4 months. • Continued on a part-time basis for at least 12 months, to allow time for remodeling of gingival tissues. • If significant growth remains, continued part-time until completion of growth.

12. Retention 3. Planning of Retention(continuous): • Permanent retention is justified in patients with cleft lip or palate A prosthesis may be used as a retainer

13. Planning of Retention Factors important in the planning of retention: 1. Original malocclusion and patient’s growth pattern. 2. The type of treatment performed. 3. Type of retainer. 4. Duration of retention.

14. Retention 4. Retainer

15. Retainer The kinds of Retainer: 1. Removable Retainers 2. Fixed Retainers 3. Active Retainers

16. Retainer Removable Retainers: 1. Hawley Retainers 2. Modified Hawley Retainers 3. Wraparound Retainers 4. Positioners as Retainers

19. Retainer Removable Retainers: 1. Hawley Retainers 2. Modified Hawley Retainers 3. Wraparound Retainers 4. Positioners as Retainers

21. Retainer Removable Retainers: 1. Hawley Retainers 2. Modified Hawley Retainers 3. Wraparound Retainers 4. Positioners as Retainers

23. Retainer Fixed Retainers: 1. Fixed canine to canine Retainer 2. Fixed lingual Retainer

25. Retainer Active Retainers: 1. Spring Retainers Realignment of irregular incisors 2. Modified Functional Appliances Correction of occlusal discrepancies

29. Retainer Active Retainers: 1. Spring Retainers Realignment of irregular incisors 2. Modified Functional Appliances Correction of occlusal discrepancies

31. Retention 5. Prevent of relapse

32. Prevent of relapse 1. Elimination of the cause of malocclusion will prevent relapse

33. Prevent of relapse 2. Malocclusion should be overcorrected as a safety factor.

34. Prevent of relapse 3. Proper occlusion is a potent factor in hold teeth in their corrected positions.

35. Prevent of relapse 4. Bone and adjacent tissues must be allowed time to reorganize around newly positioned teeth.

36. Prevent of relapse 5. Corrections carried out during periods of growth are less likely to relapse.

37. Prevent of relapse 6. The further teeth have been moved , the less likelihood there is of relapse.

38. Prevent of relapse 7. Extraction of the third molar. As the eruption of the third molars, a force push forwards will result in relapse.

39. The End