6/9 - Pindexing, Working Casts and Dies, 325-340 (HEAVY EMPHASIS FOR FINAL)

Question 1

what is the system of making removable dies

Answer 1

pindex system

Question 2

what are the parts of the pindex machine

Answer 2

1. on-off switch
2. motor housing
3. work table
4. handle bar
5. pilot light
6. light beam director
7. drill hole

Question 3

what part of the pindex machine moves the table up and down

Answer 3

handle bar (but our own system you just push the whole table down)

Question 4

you should build stone ___ mm beyond the border of the tray

Answer 4

20 mm

Question 5

how thick should hard stone base be? where should you trim to? what should the faciolingual width be?

Answer 5

15-18 mm; trim to depth of fold; F-L is 15-18 mm

Question 6

how many pins for each die, pontic area, and any terminal segments

Answer 6

two

Question 7

should the cast be damp or dry when drilling into hard stone

Answer 7

DAMP

Question 8

should the cast be damp or dry when trying in and cementing the pins into the cast

Answer 8

DRY

Question 9

should the collar of pin be flush with the base of the cast

Answer 9

YES

Question 10

do you put short pins or long pins in first

Answer 10

short pins first

Question 11

which pins in the lingual holes

Answer 11

short pins

Question 12

which pins in the facial holes

Answer 12

long pins

Question 13

once cement w/ pins has dried, what do you do next?

Answer 13

place sleeves over the pins with flat sides facing each other

Question 14

what sleeves go on long pins

Answer 14

black

Question 15

what sleeves go on short pins

Answer 15

gray

Question 16

what do you place on the cast has a separating medium?

Answer 16

Super-Sep (preferred) but can use petrolatum (grady no like)

Question 17

what should you do at the end of gray sleeves to prevent stone from getting in

Answer 17

put wax

Question 18

after the pins are in, you should box the wax with what

Answer 18

red boxing wax

Question 19

should you pre-mark saw cuts or just full send

Answer 19

pre-mark

Question 20

what is the height of the pin on the pindex machine

Answer 20

~5 mm

Question 21

what happens if pins are not totally seated?

Answer 21

• base can be locked in or stone fracture
• pin may dislodge

Question 22

can pin be removed if not totally seated?

Answer 22

YES! pliers but never reuse a nicked pin

Question 23

why use Super Sep instead of Vaseline

Answer 23

Super Sep flows easier. Vaseline clumps thus possibility of void

Question 24

when measuring the cast, do you measure 15-18 mm to the cervix of the tooth or to the occlusal surface?

Answer 24

occlusal surface

Question 25

how many mm bevel at base of cast? why?

Answer 25

3 mm bevel
allows for easier separation between HardRock pour and FlowStone pour

Question 26

T/F: short pins are circled, long pins just have X

Answer 26

TRUE

Question 27

what should you use to continue to drill hole if the pin doesn’t go all the way in

Answer 27

hand reamer

Question 28

what is the name of the adhesive to put the pins in

Answer 28

liquid cyanoacrylate

Question 29

what side of the pin goes in first? the long or short side of pin

Answer 29

SHORT SIDE

Question 30

does the flat side of the sleeve face facial or lingual? why?

Answer 30

FACIAL! to give more space between the pins

Question 31

do you use the whole thickness of the boxing wax or half the thickness? do you place the cut or uncut side down

Answer 31

half lengthwise; place uncut side down

Question 32

how many grams of FlowStone

Answer 32

~200 g

Question 33

how much FlowStone should you flow into base?

Answer 33

just barely covering the bottom bevel

Question 34

indexes should be placed in a ___fashion

Answer 34

tripod

Question 35

what’s the name of the band at the end of pindex lecture

Answer 35

The Searchers

Question 36

what’s the name of the coach that said “be quick but don’t hurry”

Answer 36

John Wooden

Question 37

what is the cast that is mounted on the articulator

Answer 37

working cast

Question 38

what is a model of the individual prepared tooth on which the margins of the wax pattern are finished

Answer 38

die

Question 39

what are the two systems of working casts

Answer 39

1. separate die
2. removable die (pindex)

Question 40

advantages of separate dies

Answer 40

1. no addn procedures needed to create a die other than making two casts (a full-arch and a sectional)
2. keeps relationship between abutments fixed and immovable
3. easier to obtain physiologically harmonious restoration contours when fabricating wax pattern

Question 41

disadvantages of separate dies

Answer 41

transferring of wax pattern between 2 casts lead to distruction of internal aspect of wax up

Question 42

T/F: a properly trimmed die means the handle with be at an angle

Answer 42

FALSE. will not have an angle and at 1 inch long

Question 43

what can you use to trim the die

Answer 43

acrylic bur (pear shaped one) and can shape with scalpel

Question 44

die contours should be what length

Answer 44

at least 4 mm

Question 45

should the preparation finish line on the die be outlined?

Answer 45

yes with red pencil

Question 46

where should you place die relief

Answer 46

preparation portion of the die

Question 47

types of antirotational devices used for removable dies

Answer 47

1. flat-sided single dowel
2. double straight dowels w/ a common head
3. two separate parallel dowels

Question 48

how many mm extension of FlowStone

Answer 48

4 mm but actually 3 mm bc taking into account the bevel

Question 49

should you be able to see the end of any of the long pins at the base of the FlowStone

Answer 49

YES

Question 50

should you carve FlowStone until you can see the bevel

Answer 50

YES

Question 51

how can you cut the stone

Answer 51

with a diamond disc or hand saw but use the diamond disc

Question 52

do you put plaster on the whole blue base

Answer 52

nah - avoid the pins, grady did the rope wax apparatus to avoid the pins