Transcript Retention Phase of Orthodontics

Retention Phase of Orthodontics
• It is the functional adaptation
period, following active orthodontic
phase.
Biological basis of retention
• Within a short period of time , most
of the periodontal fibers realign
themselves, the supra-alveolar and
transeptal fibers change very
slowly.
• Woven bone matures into bundle
bone.
Factors affecting retention planning
• 1- Original mal-occlusion.
• 2- lengths of cusps, relation of
• inclined plane.
• 3-status of perio-oral muscles.
• 4- Etiology of malocclusion.
• 5- Skeletal age of the patient.
Factors affecting retention planning
• 6- Cooperation of the patient.
• 7-Distance of the teeth movement.
• 8-Length of active period.
• 9- Status of cranio-facial growth.
• 10-Post-treatment occlusion.
• 11- Status of third molars
Types of retainers
• 1- Removable retainer.
• 2- Fixed retainer.
• 3- Positioner.
Duration of Retention
• 1- No Retention
• 2- Permanent Retention.
• 3- Temporary Retention.
Orthodontic Relapse
• Relapse is the loss of correction
achieved through orthodontic
treatment.
Common relapse problems
• 1-Collapse of mandibular
expansion.
• 2- Relapse of corrected open –bite
or deep bite.
• 3- Relapse of posterior cross- bite.
• 4- Relapse of corrected rotation, Re
-apperance spacing or crowding
Etiology of relapse
• 1-Improper orthodontic diagnosis.
• 2- Inadequate