Temporary Bridge fabrication Part 1

hey this is John de Lancie here we are

filling today a little tutorial on how

to make temporary crowns for temporary

bridges actually this is this is more

complex than making single crowns

because we've got multiple margins to

worry about as well as embrasures so

we're going to do a demonstration on a

model which is a lot tougher than doing

it in the mouth because we don't have as

visible margin on this as it is in the

mouth but we're going to try this you

could there'll be a lot of things that

are applicable if it's not exactly as

nice as in the mouth but let's go let's

give it a whirl

okay first thing I'm going to do is

we're going to mix some acrylic now

there's different ways okay I don't care

what your whether you put focus on this

is fine now there's different ways of

doing this there's the salt and pepper

technique where you're placing the

powder and the liquid directly into this

model into this soon as this impression

I I like to do it in a mixing dish I

just think it's faster but both ways can

work way back okay I'm trying to look in

here Gina just so you can see the you

can see the liquid in there okay here's

that here's the fast way to determine

the right amount of powder I place the

pattern here now I've got way too much

liquid in here but what the heck I'm

going to let the powder fall to the

bottom of the liquid so that all the

particles get wet and when it starts to

accumulate on the surface thing you're

pretty much ready it's nice and flowable

and that's fine because you want it to

flow in here now I forgot to put some

vaseline on here I'm going to quickly

put some vaseline here so

and get stuck too much expecting it to

get stuck so obviously in the mouth you

would do this only if you had some kind

of a a base a composite resin buildup on

it alright so now I've got my my acrylic

and it's nice and horrible pour it in

try to figure out about how much you're

going to need depending on how big that

Pontic space is you might want to add a

little bit more to make sure it totally

covers that space you don't have to put

it in the patient's mouth immediately

because I wanted it to be nice and runny

so that it poured in here without any

bubbles but I don't need to put it in

the patient's mouth I'm waiting actually

for this to get a little loose it's

gloss just get a little bit earlier so

it doesn't run out of here so much I'm

going to just still hold waiting waiting

okay all right that's feeling good now

I'm going to put it just like I would

place it in patient's mouth making sure

it's indexed correctly have the patient

bite down into it here we go and they

bite down and those stuff squishes out

just like it would squish out in their


just like in their mouths you can you

can remove some of this excess just

because the more excess you have the

more likely this it's going to lock in

some place now I apologize for this red

stuff is going to the red wax is going

to color the temporary but it's just

this easy way to keep it from walking in

okay now if that was a live patient you

would now be taking a saliva ejector and

holding it near their mouth to just get

the fumes out you might be also

suctioning up some liquid but this stuff

really stinks so if you put this live

ejector just in your bite it just Watts

away some of the vapors now we're going

to just keep monitor this now and see

how the set is extraordinarily important

because this stuff gets really hot

especially in large quantities so you

want to you have a little contest you're

running here if you take it out too late

it's going to get hot and burn the

patient if you take it out too soon it's

going to distort and then you're going

to be kind of back to where you started


oh boy this is really sticky yeah so um

when in doubt take it out sooner rather

than later and I'm just playing with us

notice it's starting to get to the

rubbery point where when I bend it it's

coming back to where it was

before but if I push my finger in it's

still way soft so if I took it out now

it would definitely distort now again

remember in the patient's mouth is going

to be setting faster because the heat in

the patient's mouth is going to make it

set faster so again you have to kind of

err on the side of caution I would

rather you take it out too soon and then

have to redo it because it got messed up

then you waited too long to burn the

patient or it locked on it you couldn't

get it off

you could always redo it but you heard

the patient then said we really scored a

negative all right so I'm looking at

this not feeling any heat generating

here yet if I put my finger now in I see

a print but it doesn't really bounce

back fully so there's still with this

store big-time I'm going to wait a

little longer it's fun to play without

like a finger more than one

ooh starting to feel a little bit of

heat here now if I was this was a real

patient I would double check my study

time like a refill in the mouth and

there's at least some place where it's

visible and I'd kind of poke it because

this is a room temperature thing it's

going to set at the same time here but

in the nap I might feel that's feelings

starting to feel set and it have them

open up let's check it again started to

get a little feet here there Jean I'll

give you peace to play this you can feel

it too starting to feel that heat all of

them have ever felt this stuff really

get hot and okay so you know what it's

like it's super hot

now the more liquidy that you make this

stuff when you make the original mix the

slow at a set so if I'm in a hurry

I will make a thicker mix if I've got a

big bridge I'm going to make it thinner

because I need more time now Delphi

starting to get some warmth here still

distorting though who just about right

no no yo my feet don't burn that's right

that people burn it it will chemically

burn button alright and I've got some

distortion still okay now I have a big

void in here where I didn't place enough

material sometimes we'll go through the

realign process - now this is rubbery

but if I try to take it out now it would

distort big-time so I'm going to just

I'm just going to let this cure all the

way here and then we're going to do a

realign I'll show you how we did in real


okay so let's hit pause there