extractions in orthodontics Flashcards
why do we want to create space in the mouth?
- relief of crowding
- correction of incisor relationship
- correction of molar relationship
- compensate for skeletal discrepancy
how do we create space in the mouth?
- growth (functional appliance)
- distal movement
- expansion
- interdental enamel reduction
- extractions
what kind of orthodontic appliance can cause distal movement?
- headgear
- non-compliance distaliser
- implants
what ind of orthodontic appliance causes expansion?
- quadhelix
- RME
list 8 reasons for extractions?
- caries/pulp pathology
- trauma
- ectopic pernament teeth
- hypodontia
- centre-line shift
- infraocclsion
- supplemental teeth
- preperation for alveolar bone graft
why extract A & B ?
- caries
- trauma
- ectopic pernament teeth
why extract the C’s?
- caries
- trauma
- transitional incisor crowding
- correct centre-line
- ectopic pernament canine
when should you be able to palpate the canines?
you should be able to palpate the canines from age 9 onwards
if the upper 3 is palatally ectopic, what might you consider?
extracting the C
why might you extract the D’s?
- caries
- infraocclusion
- hypodontia
- ectopic pernament teeth
- ectopic pernament canine with crowding
why might you extract the E’s?
- caries
- ectopic 5
- infraocclusion
- hypodontia
- impacted 6
what are some general considerations you would need to think about before doing any extractions?
- medical history
- tooth quality
- amount of crowding
- site of crowding
- profile and soft tissues
- skeletal pattern
- missing teeth
- anchorage
what is the most popular treatment for class 1 crowded cases in the UK?
-4 premolar extractions and fixed appliances
with the extraction/non-extraction debate, there is the suggestion that extraction treatment can cause….
- TMJ dysfunction
- flattening of profile
however, no scientific evidence to support these arguments
