L1 - Intro Flashcards
Key I - Molar Relation
Class I
MB cusp over MB groove of lower first molar
Distal surface of the DB cusp of the maxillary first molar contacts the mesial surface of the MB cusp of the mandibular second molar and the MB cusp of the maxillary first molar occludea in the buccal groove of the mandibular fisrt molar
Key II crown angulation (tip)
crown angulation (tip) – long axis of crown measured from 90 degree to occlusal plane
mesio-distal angulation
gingival portion of crown vs occlusal portion of crown
normally occluded teeth demonstrate gingival portion of crown more distal than occlusal portion of the crown
key III - crown inclination what direction
B-L inclination / torwue
crown inclination determined by angle b/w a line 90 degrees to the occlusal plane and a line tangent to the middle of the labial or buccal clinical crown
incisors what type of torque
should have a positive torque
interproximal contacts should be
tight point contacts - no spaces
Goals of ortho tx
- diagnosis
- prevention
- interception
- treatment
- maintenance
knowing your patient means
- defining chief complaint
- face analysis
- dentition analysis
- skeletal analysis
- functinal assessment
sagittal plane helps with
longitudinal vertical plane dividing head in two halves R and L
anterior posterior relation
- dental and skeletel class, profile analysis
frontal plane helps
vertical relations
facial proportions, dental/ skeletal open or deep bites, assymetries
transverse plane can see
horizontal relations
- like cross bite
see ortho when
before age of SEVEN - and sooner if something is obviously wrong before this age –> recommended by AAO –
key IV
rotations - no rotations should be present
a rotated molar occupies more mesiodistal space, creating a situation unreceptive to normal
key V
tight contacts – interproximal contact should be tight - NO SPACES
KEY vi
OCCLUSAL PLANE - CURVE OF SPEE
