E2/Q2: Lect 7 Master Cast & Die Prep

Question 1

The Pindex system consists of: a special ____ press

brass _____ and plastic _____

Answer 1

drill…dowels…sleeves

Question 2

The impression is poured in stone, separated when set, and trimmed to a horseshoe shape. The base must be
absolutely _____

Answer 2

FLAT

Question 3

*“IMPORTANT”-Dr.P…. how much stone do you need from the cervical part of the tooth to the bottom of the pour up?

Answer 3

15.0 mm (need enough room for the length of the pins)

Question 4

The location of each dowel is marked on the occlusal surface. ____ dowels are needed to stabilize each segment.

Answer 4

Two

Question 5

When cutting your die out of the stone you need to use a saw blade. How thick is it?

Answer 5

JAMES BOND–>0.007” or 0.010”

Question 6

Ok, Die is cut out now use large ______ to round die base into a cylindrical shape. Approach the margin, but avoid touching it.

Answer 6

E-cutter

Question 7

Use a _______ with a #25 blade to trim those areas too close to the margin for an E-cutter

Answer 7

bard parker

Question 8

Mark the margins with a ________ pencil. Margins must be clear, crisp, definable and undamaged.

Answer 8

NON graphite

Question 9

The marked margins can be coated with low-viscosity ________ resin and immediately blown dry…If performed properly, this procedure adds no more than a ______ to the die…This aids in preservation of the line as well as helping to prevent damage to the die margin.

Answer 9

cyanoacrylate… micrometer

Question 10

_______: This material is applied to the die to increase space between axial walls of the prepared tooth and the restoration….For adequate marginal adaptation, a band of about ___mm immediately adjacent to the preparation margin must be left UNPAINTED.

Answer 10

Die Spacer.. 1 mm

Question 11

You want a TOTAL of ___ to ___ microns of die spacer added. Each coat is approx ____ microns.

Answer 11

35-45 micrometers….one coat is approx 13 micrometers

Question 12

_________: The name given to all wax used in forming the pattern for cast restorations

Answer 12

Inlay Casting Wax

Question 13

IMPORTANTE!!! What are the 4 components of inlay casting wax? What is the function of each?

Answer 13

1. Paraffin (40-60%) 2.Dammar Resin(reduce flaking) 3.Carnauba/ceresin/candelilla/beeswax (to raise melting temp) 4.Dyes (color contrast)

Question 14

Wax Categories: ______ A medium-hardness wax (generally used with the direct technique for making wax patterns in the oral cavity)

Answer 14

Type I

Question 15

Wax Categories:______ A softer wax (generally used for the indirect fabrication of castings)

Answer 15

Type II

Question 16

BEFORE YOU START WAXING _______ THE DIE

Answer 16

LUBRICATE

Question 17

What power magnification is practical and helpful when evaluating the wax coping?

Answer 17

Ten power magnification is practical and helpful.

Question 18

Say whaaa? Evaluate the buccolingual dimension with a _____ gauge. This instrument is also helpful in assessing axial shape and height of contour

Answer 18

Boley…where the f is ours?

Question 19

Each contact area has _____ embrasures

Answer 19

4 (gingival, buccal, lingual, and occlusal)

Question 20

Dr. P guaranteed to have one of these questions on Monday’s Quiz*The anteroposterior curvature of the maxillary and mandibular occlusal surfaces.

Answer 20

Curve of Spee

Question 21

Dr. P guaranteed to have one of these questions on Monday’s Quiz*The mediolateral curvature of the maxillary and mandibular occlusal surfaces.

Answer 21

Curve of Wilson

Question 22

When working on the occlusion: After each addition of wax, check the occlusal ______ by closing articulator.

Answer 22

contact

Question 23

Give each cusp a triangular ridge that runs toward the center of the occlusal surface. The apex at the ______ and the base in the center of the ______ surface.

Answer 23

cusp tip..occlusal

Question 24

Make ____ secondary or supplemental ridges adjacent to each triangular ridge

Answer 24

2

Question 25

Occlusal contact are evaluated by dusting with ____ stearate or powdered wax

Answer 25

zinc

Question 26

Final Wax Evaluation: Pattern must be very _____ and YOU MUST _____ THE MARGINS

Answer 26

smooth…RE-FLOW