week 3 Flashcards
what is the space available
mesial or permanent 1st molar to mesial of contraleral permanent 1st
what is the space required
Mesiodistal width of all teeth 2nd premolar to contraleral 2nd premolar
what are the assumptions of space analysis
AP position of incisors is correct
space avilable with not change with growth
ways of measureding crowding/spacing for unerupted teeth
Measure on radiographs
Estimation from proportionality tables
what is the Moyer’s estimation
Measure mandibular incisors and use a table
how does Tanaka/Johnston mestimate Manibular in one quadratn
1/2 width of permanent mand incisors+10.5mm
also measure the 2 incisors for that quadrat
how does Tanaka/Johnston estimate max in one quadrant
1/2 width of permanent mand incisors+11mm
also measure the 2 incisors
how do you calculate ANB
SNA-SNB
what does SNA say
Relative AP position of Maxilla
what does SNB say
Relative AP position of the Mandible
what is the E line
Esthetic plane from the nasal tip to pogonion soft tissue (chin)
where should the upper Lip be in relation to the E line
4mm behind
where should the lower lip be in relation to the E line
2mm behind
what are the limits of angles classification
ONly A-P plane
No intra-arch problems (crowding/spacing)
does no discriminate between skeletal and dental malocclusions
what are the parts of Ackerman and Proffit’s classification of Malocclusion
- Facial proportion and esthetics
- alignment and symmetry with dental arches
- Skeletal and Dental relations in the transverse plane
- skeltal and dental relations in the antero-posterior plane
- skeletal and dental relations in the vertical plane
what problems should be prioritized
Developmental problems
what is the first part for treatment planning for ortho
Controll disease states first
what should the patient be informed of when treatment planning
Setting priorities for ortho treatment
balance patients wishes and severity of problem
what should affect your choice of a specific plan
Interactions amoung various possible solutions
Compromise
Cost-risk/benefit analysis
what is the goal of all ortho treatment that may have to be compromised
Esthetics, occlusion, and stability (may have to remove a tooth for ortho to compromise)
what is included in a cost
Burden of care (is it worth it)
what is included in a risk
Negative consequences
Side effects
unexpected events
what are the general indications for treatment
Psychosocial
Developmental
Functions (respiration, TMD, mastication and speech)
trauma/Disease control
what are the 3 parts of malocclusion
Skeltal
Soft tissue
Dental
how to help with class 2
Elastics
Head gear
extraction to create space
how to help with class III
elastics
Head gear
extraction to create space
why evaluate faces using a Ceph
Pretreatment eval and diagnosis
Post treatment eval
treatment progress
GRowth changes
what is used to look at certical proportion in a ceph
Mandiular plane angle
% face height
what is used to look at growth direction
Y-axis
what length face does class II have
Long face
what length face does class III have
Short face
