intro to ortho

Question 1

define malocclusion

Answer 1

variation (not disease) from ideal occlusion which has dental health and or/psychosocial implications for the individuals

Question 2

what is orthodotnics

Answer 2

branch of dentistry concerned with growth of teeth jaws and face

Question 3

types of ortho appliances

Answer 3

fixed
functional
removeable

Question 4

dentofacial orthopaedics

Answer 4

modify growth to improve relationships between facial bones

Question 5

benefits of ortho tx

Answer 5

dental health (caries, PDD, trauma, masticatory function, speech, unerupted/ectopic teeth)
social well being

Question 6

trauma to anterior teeth

Answer 6

overjet more priminannt
39% overjet with 6mm increased prevelance
- fixed either via functional./headgear with 2 stages or observe then one phase tx

Question 7

what can unerupted/ectopic teeth lead to

Answer 7

resorption of surrounding roots
cystic change (ie cyst formation)

Question 8

define health

Answer 8

complete state of physical mental adds coil wellbeing and not merely the absence of disease or infirmity

Question 9

risks/problems with ortho treatment

Answer 9

cost/inconveience
pain/discomfort
incomplete treatment (non compliance)
medical disorders
demineralisation/caries
root resoprtion
relapse

Question 10

root resorption in ortho

Answer 10

mean resorption for mx incisors 0.9mm

Question 11

patient factors of root resorption

Answer 11

genetic
systemic disease
nutrition
age 
gender
habits

Question 12

dental factors in resorption

Answer 12

short roots
blunt roots
history of trauma
ectopic canines
increased overjets
endodontically treated
alveolar bone density

Question 13

treatment factors in resoprtion

Answer 13

length of tx
fixed appliances
rectangular archwires
class II elastics
continuous forces
types of tooth movment
degree force
jiggling forces

Question 14

IOTN

Answer 14

dental health and aesthetics
Grade 1-5 no need
4/5 great too very great need

Question 15

IOTN aesthetics

Answer 15

1-10 compare with models

Question 16

incisor class 1

Answer 16

lower incisors occlude at or just below the cingulum plateau of upper inciusors

Question 17

incisor class 2

Answer 17

div 1 and 2
div 1
- upper incisors average inculcation or proclaimed
lower incisor tip occludes behind the CP

div 2
upper incisors reteroclined

Question 18

incisor class 3

Answer 18

lower incisor tip occluded in front of the CP of upper incisor

Question 19

buccal class 1

Answer 19

• mesiobuccal cusp tip of the upper 6 occludes in the mid buccal groove of the lower 6

Question 20

class 2 buccal

Answer 20

• mesiobuccal cusp tip of upper 6 occludes anterior to the mid buccal groove of the lower 6

Question 21

1/2 unit class 2 buccal

Answer 21

• mesiobuccal cusp tip of upper 6 occludes cusp-to-cusp with the mesiobuccal cusp tip of the lower 6

Question 22

class 3 buccal

Answer 22

• mesiobuccal cusp tip of upper 6 occludes posterior to the mid-buccal groove of the lower 6

Question 23

1/2 unit class 3

Answer 23

• mesiobuccal cusp tip of upper 6 occludes cusp-to-cusp with the disto-buccal cusp tip of the lower 6