Canines

Question 1

where are canines usually etopicaly displaced?

Answer 1

palatally

Question 2

when are they usually palpale in buccal sulcus?

Answer 2

10-11yrs

Question 3

what does Becker’s & Peck’s theory suggest canine impaction is due to?

Answer 3

Becker’s = distal of lat incisor is guide plane for canine eruption
Peck’s = canine impaction due to genetic inheritence

Question 4

name 3 conditions that may cause impacetd canines

Answer 4

cleft lip/palate
down’s
cleidocranial dysplasia/dysostosis

Question 5

what radiograph for horizontal/vertical parallax of canine?

Answer 5

horizontal - PA
vertical - occlusal & DPT
CBCT can also be used

Question 6

what do conservative, interceptive, exposure, surgical and transplantation methods involve?

Answer 6

conservative - nothing
interceptive - remove primary tooth
exposure - open or closed technique, use ortho to realign tooth, XLA primary to let 3 come in
surgical - XLA tooth surgically, C will be kept or if there is good contact between 2 and 4
transplantation - rarely used as can cause resorption of transplanted tooth, tooth from diff area placed in space

Question 7

Exposure & realignment - explain difference between open and closed techniques

Answer 7

open - flap repositioned apically or palatal window
closed - ortho bracket and gold chain for traction

Question 8

what flap is usually raised for XLA canines? what can be used post op

Answer 8

palatal envelope flap
dressing plate can be used post op

Question 9

why is saline irrigation required for bone removal? what must be ensured to be removed?

Answer 9

heat generation can cause necrotic bone formation
ensure all follicular tissue removed otherwise can undergo cystic formation