COMPLETE DENTURE WAXUP
AND
FLASKING PROCEDURE.

Waxing-up is the contouring of the trial denture
base into the desired form to produce a denture
base that reproduces the contour of the original
tissues in the dentulous mouth in order to :

1-produce a pleasing natural appearance.

2-aid in retention and stability of the dentures.

Waxing may be accomplished either by placing
a piece of soften base plate wax to the base and
gradually carving it down to the desired form or
by depositing molten wax in the proper area to
build up the desired form so that:

1-the anterior portion of the maxillary denture
base should be shaped so that together with the
teeth, it provides a pleasing form for the lip.

2-the contour of the mandibular denture in the
anterior region is relatively straight.

3-the form of buccal flange from the premolar
backward should face downward and outward
for maxillary and upward and outward for
mandibular. This contour allows the buccinator
muscle to lie against the denture and aids in its
retention and stability

4-the contour of the lingual surface in the anterior
region should be straight and slope to the lingual
border.

The contour of the lingual surface in the premolar
and molar region ( retromylohyoid region) as a
concave surface in this area provides space for
the tongue

5-any excess wax around the teeth is removed.
The remaining wax is carved at the cervical line of
artificial teeth to simulate the natural appearance
of the gingival margin and gingival papillae.

6-the region of attached gingival may be stippled
to produce a finished denture whose surface
show an a "orange-peel effect".

7-the wax above the roots should be contoured
to simulate the root prominences present in
dentulous mouths.

8-the palatal surface of the maxillary trial denture
base should be waxed to a nearly uniform
thickness of 2.5 mm.

9-the wax at the borders is contoured as in the
impression to produce a perfect peripheral seal.

10-finally,wax solvent is used to remove any
excess wax from the surface of the teeth.
PROCESSING OF DENTURE

Flasking.

Wax elimination.

Packing and curing.
Processing

Techniques

Compression

Microwave

Injection
Processing Technique

Compression molding
 Conventional
 More
 Time
method
than 60 years
consuming
Master cast
Mounting (with casts
already indexed on the
bases)
* Trim base of cast to the dimension
that will fit in the processing flask
prior to indexing
1
2
3
Split mold
Denture flask (ejector-type, three piece)
1. The drag (bottom)
2. The cope (middle)
3. The cap (thin top)
Split mold
STIPLE WAX ON FLANGES.
TINFOIL
BASE OF
CAST.
CHECK CLEARANCE
WITH FLASK.
CHECK PERIPHERAL
CLEARANCE.
LOWER HALF
OF FLASK
POURED.
POURING STONE FOR
THE UPPER HALF.

Maxillary denture with the index in place and embedded
in the flask Soap, or a gypsum separator, is used between
the two pours of dental stone in the lower and upper
portions of the flask.
CLEAR THE
LINGUAL TROUGH.
CLEAR THE TEETH.
•The surface of the third layer is left slightly rough to hold the fourth investment layer in
position.
•Tinfoil separating medium is painted on the third layer.
•The fourth investment layer is used to fill the remainder of the flask. The lid of the flask
is pressed into place while the investing stone is still soft. The flask is set aside for
min. 1 hr. before the wax elimination.
Second pour (upper half of flask)
STONE CAP
UPPER
HALF STONE
STONE CAST
LOWER HALF STONE
COMPLETED FLASKING.
STONE CAP
UPPER
HALF STONE
STONE CAST
LOWER HALF STONE
COMPLETED FLASKING FOR
THE MANDIBULAR
COMPLETE DENTURE.
Processing Technique

Microwave System

(GC America Inc.3737 W. 127th Street, Alsip, IL 60803)
Use the split mold technique to form molds
 ACRON MC microwave cured acrylic
 Need special flask
(resin + small metal screws)
 One minute microwaved to soften wax
 Eliminate wax from mold
 Three minute curing in microwave
 Leave 15-20 mins before opening flask
 Less VDO increase??
 Easy to use
 Low water absorption

Microwave system

Three minute curing in microwave
 Fast,
easy to use
 Allows
more efficient use of time
 Produces
 Denture
 Interim
denture in short processing time
repair
partial
Processing Technique
3. Injection
3.1 Ivocap injection system, Ivoclar, Vivadent, Inc,
Amherst, NY)
 In
Mid 1970
 VDO
is more stable compare with
conventional
 Flask
is closed during the procedure
Processing Technique
3. Injection
3.2 Success System (Dentsply, International, Inc, York,
PA)
 PMMA
 90
Lucitone 199
PSI, use heat-polymerized resin
Master cast removed from invest material
Finished denture