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19 Cards in this Set

  • Front
  • Back
Full face aspect symmetry relationship
(four things)
distance bt the eyes
width of base of nose same as distance of two eyes
width of mouth = interpupillary distance
outer aspect of eye consistent of gonial angle of jaw
sagittal view (thirds) 1st, 2nd and 3rd
1st = hairline to base (bridge) of nose
2nd = maxillary
3rd = mandibular portion of face nose to mouth (1/3) and mouth to chin (2/3)
methods of facial form analysis
1. amt of tooth display
2. smile arch - curvature of lower lip should correspond to upper incisors
3. transverse/buccal corridors
4. evaluate ceph based on class I, II, III profile
5. lip position (over/under supported
limitatoins of facial form analysis
- short anterior face height usually in lower 3rd
- ong anterior face hight in middle 3rd
- high angle inidicated downward backward rotation of lower jaw
when was the ceph developed
mid 20th century
what was the ceph first called
downs analysis
two major advantages of ceph
- directly view relationship of dental arches to underlying structures and the relation to each other
- evaluate growth changes in response to tx
5 areas to identify on a ceph
- craial base
- skeletal maxilla
- dental maxilla
- skeletal mandible
- mandibular dentition
how do you determine if incisors are retrusive/protrusive
usually related to point A and point B
- anterior teeth 2mm in front of point A
- posterior teeth 2mm behind point B
how do you determine Class I, II, or III
use A and B angle - tells skeletal classification
- can have class I skeletal with a class II dental relationship
what three things can be used for superimposition
- cranial base
- maxilla (skeletal bone not teeth)
- mandible (chin or mandibular canal)
space analysis major assumptions
- correlation bt size of eruptoin and mand incisors to size of remaining unerrupted max canines and premolars
- pt base to derive prediction
- assume all succ teeth are developing normally
- assume you can predict space analysis accurately (human error and viewing inside the mouth)
- incisors will not change in a way that increases or decreases arch circumference and available space (flaring or retroclined)
what is the rationale for ecpecting decreased accuracy in children without class I relationship
class II - lower incisors flare out to compensate (have more arch space in mand than normal)
class III - lower incisors are retroclined decreasing space
class I - child looses 1st primary molar early and perm can shift mesially giving false reading
what materials are needed to perform space analysis
accurate study casts (1st molars and central and lateral incisors)
- boli gauge and space analysis form
- tanaka-johnson
how do you interpret class I, II, and III space analysis with incisors
class II - flaring - increased space "apparent" not really more space
class III - retroclined
class I - molars end to end on distal aspect - mesial shift of upper first molar into leeway space
major characteristics of malocclusion
normal = Aranglment of max teeth to mand teeth (Harmonious line where occlusal grooves line up and go into incisal edges)
class I normal with no crowding or spacing
class I mal - crowding, cross bite, open bite, deep bite
class II mal - molar classification plus above
class III mal - molar classificatoin plus above
skeletal xbite different from dental xbite
- measure rule of thumb
- measure width of palate - normal with xbite = dental
- narrow palate (thumb doesn't fit) = skeletal xbite
skeletal differentiated from dental class II or III
- profile from ceph or clinic
- class II - mand deficient
- class III - mand excessive
describe ceph open and deep bite
open = short ramus and palatal plane tipped up (posterior down = open bite)
deep = anterior very short face. low angle plane - can bee measure on ceph. clinically see a lot of tooth overlap