34 Questions
What is the purpose of flasking in denture processing?
To produce a mould of the waxed-up denture for packing and processing of the acrylic material
What is the recommended material for flasking in denture processing?
Dental plaster/stone
What is the purpose of vibrating the material during flasking?
To ensure easy flow of material over the teeth and wax surfaces
What is the next step after investing the wax pattern in chrome cobalt?
Completed cast framework
Which reference provides information about the neutral zone in complete and partial dentures?
Beresin, V.E. and Schiesser, F. J.: The neutral zone in complete and partial dentures
What is the purpose of the palatal plate sprue?
To create a vent for air and gas escape
What is the purpose of spruing the wax pattern?
To create channels for molten metal to flow
What is the purpose of applying a separating medium during acrylic resin packing?
To prevent the resin from sticking to the mold
Which error during denture processing specifically involves bleaching of acrylic resin?
Color streaks in the material
What is the purpose of wax elimination in denture processing?
To remove excess wax before packing with resin
What is the purpose of the separating medium in denture flasking?
To prevent the plaster from sticking to the denture and the flask
What is the recommended material for flasking in denture processing?
Dental plaster/stone
What is the purpose of the palatal plate sprue in denture processing?
To facilitate uniform flow of acrylic material
What is the purpose of vibrating the material during flasking?
To ensure easy flow of material and eliminate air bubbles
What is the purpose of investing the wax pattern in chrome cobalt?
To create a durable metal framework for the denture
What is the next step after completing the cast framework?
Record block on framework
What is the purpose of spruing the wax pattern?
To allow for the escape of gases during casting
What is the recommended material for investing the wax pattern?
Chrome cobalt
What is the purpose of the palatal plate wax pattern?
To establish the contour of the denture base
What is the purpose of mounting and setting up of teeth?
To create occlusal relationships
What is the purpose of the record block on the framework?
To record the patient's jaw relationship
What is the purpose of metallic denture base construction?
To create a durable base for the denture
What is the purpose of wax elimination in denture processing?
To remove wax from the mold to create space for the acrylic resin
What is the purpose of applying a separating medium during acrylic resin packing?
To prevent the acrylic resin from sticking to the mold
What is the purpose of deflasking in denture processing?
To remove the investing plaster and take out the model from the denture
What is the purpose of tooth movements, denture base and teeth breakage, and crazing of acrylic resin base or teeth during processing?
To identify specific errors during processing
What is the purpose of clamping the flask during denture processing?
To ensure proper alignment of the mold
What is the purpose of acrylic resin packing during denture processing?
To fill the mold with acrylic resin
What is the purpose of finishing and polishing in denture processing?
To shape and smooth the surfaces of the denture
What is the purpose of flask curing in denture processing?
To ensure proper hardening of the dental stone
What is the purpose of controlled heating during the curing of acrylic resin?
To avoid residual monomer content and porosity
What are specific types of porosity caused by different factors during processing?
Shrinkage porosity and gaseous porosity
What is the purpose of the open flask method in packing of acrylic resin?
To allow excess resin to escape during packing
What is the purpose of the injection method in packing of acrylic resin?
To fill the mold with resin using pressure
Study Notes
Denture Processing Steps and Potential Errors
- Dental stone is used in the top section for strength and excess plaster is removed before closing the lid for bench curing.
- The flask is clamped and wax elimination is done by boiling, hot water, and detergent washing.
- Acrylic resin packing involves applying a separating medium and mixing the resin at a specific ratio.
- Packing of acrylic resin can be done using the open flask method or the injection method.
- Curing of acrylic resin involves controlled heating to avoid residual monomer content and porosity.
- Different curing cycles include long, short, and rapid methods, each with specific temperature and time requirements.
- Deflasking involves removing the investing plaster and taking out the model from the denture.
- Finishing and polishing involve shaping and smoothing the surfaces, with care to avoid overheating.
- Processing errors of acrylic resins include porosity, tooth movements, breakage, and crazing of the base or teeth.
- Other errors include bleaching of acrylic resin and color streaks in the material.
- Shrinkage porosity and gaseous porosity are specific types of porosity caused by different factors during processing.
- Tooth movements, denture base and teeth breakage, and crazing of acrylic resin base or teeth are caused by specific errors during processing.
Denture Processing Steps and Potential Errors
- Dental stone is used in the top section for strength and excess plaster is removed before closing the lid for bench curing.
- The flask is clamped and wax elimination is done by boiling, hot water, and detergent washing.
- Acrylic resin packing involves applying a separating medium and mixing the resin at a specific ratio.
- Packing of acrylic resin can be done using the open flask method or the injection method.
- Curing of acrylic resin involves controlled heating to avoid residual monomer content and porosity.
- Different curing cycles include long, short, and rapid methods, each with specific temperature and time requirements.
- Deflasking involves removing the investing plaster and taking out the model from the denture.
- Finishing and polishing involve shaping and smoothing the surfaces, with care to avoid overheating.
- Processing errors of acrylic resins include porosity, tooth movements, breakage, and crazing of the base or teeth.
- Other errors include bleaching of acrylic resin and color streaks in the material.
- Shrinkage porosity and gaseous porosity are specific types of porosity caused by different factors during processing.
- Tooth movements, denture base and teeth breakage, and crazing of acrylic resin base or teeth are caused by specific errors during processing.
Test your knowledge of denture processing steps and potential errors with this quiz. From dental stone usage to acrylic resin packing and curing, learn about the various stages and common mistakes to avoid. Challenge yourself to identify specific processing errors and understand how to prevent them for successful denture fabrication.
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