CD: PROCESSING of denture AND MATERIALS

1. Investing
   A. W/ permanent base
   B. W/ Temporary base

• Remove the wax denture together with the cast
• Invest the wax denture w/ the cast following the same procedure

1. Investing
2. Wax Elimination
3. Packing of resin
4. Trimming and Polishing

Steps in Processing of Denture

1. Remount
2. Reline (min to mod)
3. Rebase (mod to sev)

3 troubleshooting in cd

REMOUNT

• Are means whereby you can correct the position of dentures to be accurate between your patient and the articulator analogue.

• Wax Denture try in
• Processed
• Delivery

What to do after remounting?

REBASING AND RELINING

• it Involves the recording of an impression within its support surface so as to correct the deficiency that has arisen as a result of tissue changes.
• This can also be done if there are processing errors especially in cases of the use temporary denture base.

Rebasing

laboratory process of replacing the entire denture base material in an existing prosthesis.

• Relining

procedure used to resurface the tissue side of a denture with new base material that provides accurate adaptation to the changed denture-foundation area.

• Static impression technique
• Functional impression technique
• Chairside technique

3 CLINICAL IMPRESSION PROCEDURES

STATIC IMPRESSION TECHNIQUE

• Involves the use of either a closed or open mouth reline/rebase procedure.
• Record the centric relation
• Use dentures as tray

FUNCTIONAL IMPRESSION TECHNIQUE

• Based on the use of tissue conditioners as functional impression materials.

CHAIRSIDE TECHNIQUE

• Acrylic added to the denture (self-cure resin)
• Materials often have produced a chemical burn on the mucosa
• The resulting material was often porous and subsequently developed bad odor
• Color stability was poor
• If the denture was not positioned correctly, the material could not be removed easily to start again.

• Vacuum-fired porcelain
• Methacrylate resins
• Modified methacrylate resins
• Vinyl resins
• Composite resins

PROSTHETIC TEETH/ DENTURE TEETH/ ARTIFICIAL TEETH, these are Produced in a variety of molds and shades and are available as:

PROSTHETIC DENTURE TEETH

• In general, teeth used in the fabrication of dentures should demonstrate optimum physical and mechanical properties to withstand the rigorous demands of masticatory functions such as (chewing, biting, shearing or crushing of food).

METHACRYLATE-BASED(PMMA) RESIN TEETH

• Manufactured either by the compression molding dough technique or by injection molding.

• Multiplex polymer matrix (MPM)
• Resin teeth containing an IPN of polymers(most popular)
• Interpenetrating polymer network
• DCL (double cross-linked resins)

• Several manufacturers of PMMA have developed resins purported to provide improved wear resistance. Among those are:

COMPOSITE RESIN DENTURE TEETH

• Were introduced in the 1980’s, as suitable materials for fabrication of denture teeth
• Modifications in the organic and inorganic components of composite resins aimed at improving their wear resistance and other mechanical properties. This included the addition of microfine and nanofiller particles such as silica.

TRUE

T/F
Composite resin denture teeth could be considered a material of choice when designing a single complete denture opposing a natural dentition.

PORCELAIN TEETH

• Commercially manufactured and supplied as individual or complete sets of teeth of excellent quality. They are available in a wide range of shades and molds.

PORCELAIN TEETH

• The teeth exhibit superior esthetic qualities, excellent color stability and high abrasion resistance as compared with resin teeth

=triaxial composition:

• Feldspar
• Quartz (15%)
• Kaolin (4%) – improve moldability of the ceramic material

Ceramic composition of porcelain denture teeth is a what? What are these?

Kaolin

Composition of porcelain that improves moldability of the ceramic material