Denture Try In

Question 1

what do you check before the patient arrives at try in stage

Answer 1

do you have the lab work
is correct patient
has lab work been damaged in transit
is lab work present what you expected from prescription
is mould and shade what you requested

Question 2

what do you check before inserting the try in

Answer 2

are the try in bases stable on casts
are try in borders smooth, rounded and with no sharp edges
is border extension shaped to depth and width of the functional sulcus

Question 3

what do you look at when the cast is on the articulator

Answer 3

is wax distorted or well adapted
check occlusion
good contacts?
pin on table?
overjet and overbite what we expected

Question 4

what do you do if no post dam has been cut on the upper cast

Answer 4

draw on cast site with indelible pencil and ask technician to cut post dam

Question 5

what is the try in checklist

Answer 5

retention and stability
base extensions
LIMBO
position of teeth compared with soft tissues
vertical dimension
even contact in occlusion
speech
aesthetics

Question 6

what must you record in the records

Answer 6

patient consent to finish

Question 7

what do you do if there is a speech problem

Answer 7

fix potential FWS problem

Question 8

what is the problem if teeth make contact during speech

Answer 8

insufficient FWS

Question 9

what is the problem if whistling sound is made during S sounds

Answer 9

OVD needs to be increased or anterior tooth position changed

Question 10

what do you do if shade/mould is incorrect

Answer 10

choose again and prescribe to lab

Question 11

what do you do if midline is incorrect

Answer 11

mark new midline and send to lab

Question 12

what do you do if there are minor changes needed for tooth position

Answer 12

alter at chairside

Question 13

what do you do if major changes are needed to tooth position

Answer 13

re-register and send to lab

Question 14

what do you do if there is minor overextension

Answer 14

modify wax and mark on master cast the maximum extent of flange

Question 15

what do you do if there is major overextension

Answer 15

go back to master impression stage

Question 16

what do you do if there is minor underextension

Answer 16

wash impression in try in and send to lab for casting
or proceed to insertion stage but instead reline

Question 17

what do you do if there is major underextension

Answer 17

go back to master impression stage

Question 18

what do you do if the OVD is increased

Answer 18

remove teeth from one or both dentures and replace with wax rim

Question 19

what do you do if OVD is decreased

Answer 19

wax rim can be added to the teeth on one or both dentures or teeth removed from one or both dentures and replaced with bigger wax rim

Question 20

what is the first step to do when there is an occlusal error

Answer 20

check OVD and decide if correct or incorrect

Question 21

what do you do if occlusal error but OVD correct

Answer 21

if uneven contact, some teeth removed from dentures and replaced with wax rim

Question 22

what do you do if occlusal error and OVD incorrect

Answer 22

correct OVD by removing teeth from one or both dentures and replace with wax rim

Question 23

what is the BULL rule

Answer 23

buccal upper lingual lower
adjust the contacting surfaces rather than the tips of cusps