Transcript Retention

Retention
1.
Definition:
The holding of teeth which had
been moved at orthodontic
treatment in ideal esthetic and
functional positions.
Retention
Orthodontic treatment
Active treatment
Retention
Retention
When the appliances are removed,
an important stage lies ahead.
That is Retention.
Retention
2.Why is retention necessary ?
Why is retention necessary
1. The balance of muscle forces
of Oral-Maxilla system have
not been achieved.
Why is retention necessary
2.
Reorganization of the
Periodontal and Gingival tissues.
Why is retention necessary
3. Occlusion balance has not
been established.
Why is retention necessary
4.
Oral habits have not been
corrected.
Why is retention necessary
5.
Occlusion changes related
to growth.
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.
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
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.
Retention
4. Retainer
Retainer
The kinds of Retainer:
1. Removable Retainers
2. Fixed Retainers
3. Active Retainers
Retainer
Removable Retainers:
1.
2.
3.
4.
Hawley Retainers
Modified Hawley Retainers
Wraparound Retainers
Positioners as Retainers
Retainer
Removable Retainers:
1.
2.
3.
4.
Hawley Retainers
Modified Hawley Retainers
Wraparound Retainers
Positioners as Retainers
Retainer
Removable Retainers:
1.
2.
3.
4.
Hawley Retainers
Modified Hawley Retainers
Wraparound Retainers
Positioners as Retainers
Retainer
Fixed Retainers:
1. Fixed canine to canine Retainer
2. Fixed lingual Retainer
Retainer
Active Retainers:
1. Spring Retainers
Realignment of irregular incisors
2. Modified Functional Appliances
Correction of occlusal discrepancies
Retainer
Active Retainers:
1. Spring Retainers
Realignment of irregular incisors
2. Modified Functional Appliances
Correction of occlusal discrepancies
Retention
5. Prevent of relapse
Prevent of relapse
1. Elimination of the cause of
malocclusion will prevent relapse
Prevent of relapse
2. Malocclusion should be
overcorrected as a safety factor.
Prevent of relapse
3. Proper occlusion is a potent factor
in hold teeth in their corrected
positions.
Prevent of relapse
4. Bone and adjacent tissues must be
allowed time to reorganize around
newly positioned teeth.
Prevent of relapse
5. Corrections carried out during
periods of growth are less likely to
relapse.
Prevent of relapse
6. The further teeth have been moved ,
the less likelihood there is of relapse.
Prevent of relapse
7. Extraction of the third molar.
As the eruption of the third molars,
a force push forwards will result in
relapse.
The End