Relapse And Retention Flashcards
Ortho challenge
Identify problems of malocclusion
Correct malocclusion
Satisfy tx goals
Retention of results
Factors affecting post-tx stabling
Alteration of arch form
Periodontal and gingival tissues
Continuing growth
Soft tissue pressures of tongue-lip-cheek
Mesial component of muscular contraction
Mesial component of occlusion
Arch form
Anterior /posterior or lateral increase in arch form usually fail, the dental arch typically returns to the pre-tx shape and size
_____ arch form is more stable when the dental expansion follows ____ expansion
Mandibular
Maxillary
How long does collagen reorganization take
4- 6 months
_____ ______ fibers remodel extremely slow
Elastic supracrestal
Periodontal relapse
Result of increased elasticity of gingiva due to elevated GAG (glucoseaminoglycans)
Growth and tx results
Any skeletal growth may attenuate, exaggerate, or maintain the dentoskeletal relationship
Amount and direction
Transverse growth
Vertical growth
Last to finish
Deep bite relapse
Growth into late teens
Open bite relapse
Elongation posterior teeth
Incisor inclination
Deep bite relapse
Common correction
Easily relapses without retention
Open bite relapse
Continuation of pretreatment growth
Active habits
Sound functional occlusion
Mutually protected occlusion
Cusp to fossa relatinoship
Canine guidance
Posterior discussion on protrusion
Extractions and relapse
Bicuspids
Maintaining extraction site closed
Reduction of arch length
Third molars
Mesially directed eruption force
Forward movement of first molars be seen ages of 13 and 17. Correlated with anterior crowding during the same period
Retention starts with diagnosis
Pretreatment arch form
Over correction
Adjunctive periodontal surgery
Lower incisor advancement
Hawley retainer
Removable
Adjustable
Pt compliance
Essex retainer
Esthetic
Pt compliance
Non adjustable
Wrap around retainer
Maximum settling
Reorganization of PDL
Passive or active
Spring retainer
Active or passive
Can eliminate <2 mm of crowding
Lingual bonded retainers advantage
Invisible
Reduced long term compliance need
Lingual bonded retainers disadvantages
Bond failure
Hygiene
Caries
Requiring monitoring by clinician
