Indications for Extraction

Question 1

What is required for referring for extraction

Answer 1

clinical and radiographic assessment

Question 2

What deems a tooth unrestorable

Answer 2

gross caries 
advanced periodontal disease
tooth root fracture 
severe tooth surface loss
pulpal necrosis
apical infection

Question 3

What are the indications for extraction

Answer 3

unrestorable teeth
symptomatic partially unerupted teeth
traumatic position
orthodontic indication
interference with construction of dentures

Question 4

What is the periotome

Answer 4

it is a mini blade that is worked down the PDl space and it cuts the PDL ligament so that the tooth can easily come out

Question 5

What are the 3 basic modes of action for the mechanical principles for tooth elevation

Answer 5

wheel and axle

lever

wedge

Question 6

What is the wheel and axle motion

Answer 6

Placed elevator into gap from buccal side so its almost horizontal
Wedge it in so tip is engaging acj or as deep u can possibly go
Then rotate the instrument, rotates on an axle
And as u rotate it twists upwards and as it does that it elevates the tooth

Question 7

What is the lever motion

Answer 7

generates more force
can be dangerous
you rest it on bone and wedge it against the surface of the tooth and move it up using a lever motion
can fracture mandible

Question 8

What is the wedge motion

Answer 8

can be done with a luxator
it is pointy and sharp
the tip is pushed into the PDL space and the root just comes up
usually need a sharp instrument

Question 9

What are the various points of application for elevators

Answer 9

mesial application
buccal application 
distal application 
superior application 
mesial then buccal application
medial and distal application
changing a point of application of force from distal to mesial 
inferior application

Question 10

Describe mesial application

Answer 10

usually start with medial application
the concave surface faces the medial surface you want to elevate and you do a rotation action which forces the tooth upwards and backwards which for a lower 8 is good if there is space

Question 11

Describe buccal application

Answer 11

if it doesn’t come out then you can swap to the buccal side and keep using the elevator and put it into the furcation and push it up and lingual this time. this only works well in the region of the lower 8 as this is where the bone is thin

Question 12

Describe distal application

Answer 12

unusual because there is usually teeth in the way and hard to get your elevator all the way back there, would have to stretch the cheek

Question 13

Describe superior application

Answer 13

would have to remove all of buccal bone
raise a flap and drill it all away and put the tip in and push it down
unusual but put in the books

Question 14

Describe mesial and buccal application

Answer 14

do medial then buccal
combination in sequence
works well for wised teeth

Question 15

Describe medial and distal application

Answer 15

not recommended
used exactly the same time
generate a vertical force
going to end up fracturing their mandible as no hand is supporting the jaw

Question 16

Descibe changing a point of application of force from distal to mesial application

Answer 16

good for remaining roots
can go through the empty socket, break down the thin bone between the sockets, engage the root, rotate and the component force will be vertical which may elevate it (the other is forward which isn’t very useful)

Question 17

Describe inferior application

Answer 17

have to lift a flap and drill bone again like the superior one