beading and boxing

Question 1

beading creates?

Answer 1

the land

Question 2

Boxing creates?

Answer 2

the base

Question 3

where to start the beading?

Answer 3

3mm from the top

so 3mm BELOW THE HEIGHT OF THE BORDER following its contour

Question 4

width of beading?

Answer 4

3mm and should be visible around impression

Question 5

what do you preserve in lower beading?

Answer 5

beading the lower impression requires perserving the posterior segments

Question 6

application of boxing wax?

Answer 6

warmed and added at RIGHT ANGLE to the beading wax - at a HEIGHT of 1 inch above the highest point of the impression

Question 7

underside surface of beading and boxing?

Answer 7

lute together and seal the edges of the boxing wax where they meet

Question 8

FULL WIDTH of the beading wax must still be visible around the entire impression to:

Answer 8

1. PRESERVE THE BORDER

2. DEVELOP THE LAND

Question 9

wax spacer with holes?

Answer 9

holes are for tissue stops

spacer if using upper for PVS

Question 10

base of cast must be parallel to?

Answer 10

the horizontal ridge

Question 11

shape of fold?

shape of border?

Answer 11

Fold - concave

Border - convex

Question 12

how do you conserve the retromolar pad area?

Answer 12

double strip of BEADING WAX in the posterior will allow the second layer to be turned up at a 90 degree angle in order to preserve the RETROMOLAR pad area

Question 13

what do you do in tongue area?

Answer 13

a ‘tongue’ is added using boxing wax to preserve the lingual border and add strength to the final cast

Question 14

orientation of the mandibular impression before boxing

Answer 14

propped up so that the mid portion is parallel to the table (ridge parallel to base) and PERPENDICUALR to the rear of the cast

Question 15

when pouring what is the ratio of powder to liquid

Answer 15

3:1

Question 16

what is the only aspect that should contact the vibrator?

Answer 16

HANDLE (not the wax – it will separate)

Question 17

how to prevent air bubbles/ air traps when pouring

Answer 17

fill from one corner and vibrate the plaster forward in a circular pattern

Question 18

how much do you fill base?

Answer 18

approx. 1/2 inch thickness

Question 19

how long do you have to separate impression?

steps?

Answer 19

within 20 minutes if alginate
remove all beading and boxing and then summerse entire cast in HOT water until the compound softens - then carefully separate

Question 20

goals/ measurements of trimming?

Answer 20

create a 3mm wide land and create a 1cm (1/2 inch) thick base

if over trim – you could have missing folds in your cast

if too thick of base – will not fit in the processing flask

Question 21

what do you trim first? second?

Answer 21

base to 1 cm (1/2 inch thicknes which is also 10mm)

then side of land to 3mm