Dental Materials Ch 16 Gypsum and Wax
Products
Casts - correct answer ✔hard replicas of hard and soft tissue of the patient's
oral cavity, made from gypsum products; also referred to as models.
Diagnostic Casts - correct answer ✔casts generally made from dental plaster
or stone and used for patient education, treatment planning, and tracking the
progress of treatment, as with orthodontic models; these casts are also known
as study models
Working Casts - correct answer ✔casts generally made from one of the
dental stones that are strong enough to resist the stresses of fabricating an
indirect restoration or prosthesis; these casts are also known as master casts
or working models.
Dies - correct answer ✔replicas of the prepared teeth that are generally
removable from the working cast
Model Plaster - correct answer ✔the weakest, most porous form of gypsum
product used in dentistry
Dental Stone - correct answer ✔a stronger, less porous form of gypsum
product used in dentistry
Die Stone - correct answer ✔the densest form of gypsum product used in
dentistry
, Pouring - correct answer ✔pouring the cast refers to the process of vibrating
the flowable gypsum product into an impression; this process must produce a
cast that is an exact replica of the impression.
Trimming - correct answer ✔the process of removing excess hardened
gypsum from the cast for ease in working with the cast and appearance in
presentation
Melting Range - correct answer ✔a range of melting points of the individual
components of wax
Flow - correct answer ✔the movement of wax as it approaches the melting
range
Excess Residue - correct answer ✔a wax film that remains on an object after
the wax is removed
Wax Pattern - correct answer ✔a duplicate of a restoration carved in wax
Lost Wax Technique - correct answer ✔a for fabricating a metal restoration
by encasing the wax pattern in stone and then vaporizing the wax under high
temperatures to leave an empty impression space once occupied by the wax;
molten metal is then cast into the space and takes the shape of the pattern
Increase W/P ratio - correct answer ✔Working time: increase
Viscosity time: decrease
Strength: decrease
Decrease W/P ratio - correct answer ✔Working Time: Increase
Products
Casts - correct answer ✔hard replicas of hard and soft tissue of the patient's
oral cavity, made from gypsum products; also referred to as models.
Diagnostic Casts - correct answer ✔casts generally made from dental plaster
or stone and used for patient education, treatment planning, and tracking the
progress of treatment, as with orthodontic models; these casts are also known
as study models
Working Casts - correct answer ✔casts generally made from one of the
dental stones that are strong enough to resist the stresses of fabricating an
indirect restoration or prosthesis; these casts are also known as master casts
or working models.
Dies - correct answer ✔replicas of the prepared teeth that are generally
removable from the working cast
Model Plaster - correct answer ✔the weakest, most porous form of gypsum
product used in dentistry
Dental Stone - correct answer ✔a stronger, less porous form of gypsum
product used in dentistry
Die Stone - correct answer ✔the densest form of gypsum product used in
dentistry
, Pouring - correct answer ✔pouring the cast refers to the process of vibrating
the flowable gypsum product into an impression; this process must produce a
cast that is an exact replica of the impression.
Trimming - correct answer ✔the process of removing excess hardened
gypsum from the cast for ease in working with the cast and appearance in
presentation
Melting Range - correct answer ✔a range of melting points of the individual
components of wax
Flow - correct answer ✔the movement of wax as it approaches the melting
range
Excess Residue - correct answer ✔a wax film that remains on an object after
the wax is removed
Wax Pattern - correct answer ✔a duplicate of a restoration carved in wax
Lost Wax Technique - correct answer ✔a for fabricating a metal restoration
by encasing the wax pattern in stone and then vaporizing the wax under high
temperatures to leave an empty impression space once occupied by the wax;
molten metal is then cast into the space and takes the shape of the pattern
Increase W/P ratio - correct answer ✔Working time: increase
Viscosity time: decrease
Strength: decrease
Decrease W/P ratio - correct answer ✔Working Time: Increase
