The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Gypsum products /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Gypsum products/certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Synthetic Gypsum, or SynGyp is a manufactured form of gypsum. The most common form of synthetic gypsum is produced as a by-product of fossil-fueled power plants. This presentation looks at what synthetic gypsum is, how it came to be, and the benefits it has to offer.
gypsum is the commonly used product in dentistry for preparing study model, die and cast.
I'm Isabel uploading my slides here & will be uploading more in future. I would love if you support me on my IG: https://www.instagram.com/dentagramming/.
Gypsum products /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Gypsum products/certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Synthetic Gypsum, or SynGyp is a manufactured form of gypsum. The most common form of synthetic gypsum is produced as a by-product of fossil-fueled power plants. This presentation looks at what synthetic gypsum is, how it came to be, and the benefits it has to offer.
gypsum is the commonly used product in dentistry for preparing study model, die and cast.
I'm Isabel uploading my slides here & will be uploading more in future. I would love if you support me on my IG: https://www.instagram.com/dentagramming/.
Gypsum products final / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Gypsum products-a topic of dental materials for dental students....
lots of knowledge...includes classification,uses,manufacturing processes etc.
COURTESY: My college friends....
Plaster of Paris consisting of a fine white powder which hardens when moistened and allowed to dry. Plaster of Paris is also known as Gypsum Plaster (CaSO4.1/2 H2O) OR (2CaSO4.H2O). Its chemical name is ‘Calcium sulphate hemihydrates’. It is a white powdery hydrated calcium sulphate.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Gypsum products final / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Gypsum products-a topic of dental materials for dental students....
lots of knowledge...includes classification,uses,manufacturing processes etc.
COURTESY: My college friends....
Plaster of Paris consisting of a fine white powder which hardens when moistened and allowed to dry. Plaster of Paris is also known as Gypsum Plaster (CaSO4.1/2 H2O) OR (2CaSO4.H2O). Its chemical name is ‘Calcium sulphate hemihydrates’. It is a white powdery hydrated calcium sulphate.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Gypsum products/dental lab technology courses by Indian dental academyIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
A comprehensive lecture by Dr Rashid Hassan covering all the aspects of different types of model and die materials. Easy ti understand ans recall.
For video lectures on different topics of Dental Materials visit and follow Dr Rashid Lectures on Dental Materials (dmbydrrashid) on Facebook.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Die materials in fpd /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Gypsum Products commercially available are hemihydrate form of calcium sulfate. Gypsum products used in Dentistry are broadly classified into 5 types
Type 1- Impression Plaster
Type 2- Model Plaster
Type 3- Dental stone
Type 4- Die Stone high strength low expansion
Type 5- Die Stone high Strength High Expansion
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
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Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
I –Aligners are made with FDA approved transparent thermoplastic materials using 3D scanning, 3D Printing and finally Trays with Pressure vacuum formers.
Dear Doctor,
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Course includes:
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--
Indian Dental Academy
Leader in continuing dental education
www.indiandentalacademy.com
skype:indiandentalacademy
+919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
2. INTRODUCTION
• Auxiliary dental material.
• Glossary of Prosthodontic terms:
• Model: Facsimile used for display purposes, a miniature
representation of something.
• Dental Cast: A positive life size reproduction of a part or parts of
the oral cavity.
• Die: The positive reproduction of the form of a prepared tooth in
any suitable substance.
• Direct link between the clinical phase of treatment and the technical
laboratory procedures.
• Contributes significantly to the ultimate success of the prosthesis.
GYPSUM:
• Originates from the Greek word ‘Gypos’ which means chalk.
• Dihydrate of calcium sulfate.
• Chemical formula CaSO4.2H2O.
• Sulfate mineral most commonly found.
• Usually white to yellowish white in color.
• Large beds of gypsum were formed when seawater evaporated, leaving dissolved
Calcium and Sulfate ions to form deposits of gypsum.
• United States is the largest producer as well as the biggest consumer of gypsum.
Others are Canada, France, Japan and Iran.
Gypsum mineral can be found in various forms:
1. ROCK–GYPSUM: widely occurring massive dull coloured rocks.
2. ALABASTER: Large fine-grained white stones. Often used for carving into
vases and ornaments. Also used in building of King Solomon’s Temple
3. SELENITE: as transparent crystals
4. SATIN SPAR: as fibrous crystals.
SYNTHETIC GYPSUM:
•
•
Also produced as a by-product of manufacture of phosphoric acid.
CHEMICAL GYPSUM.
3 H2SO4(l) + Ca3(PO4)2(s) + 6 H2O(l)
2 H3PO4(s) + 3 CaSO4·2H2O(s)
3. PROPERTIES:
Found as prismatic, curved or twisted monoclinic crystals of vitreous luster.
Specific gravity: 2.3
It cleaves perfectly in one direction.
Moh hardness no: 2, which means that it can be scratched by a fingernail.
USES:
1. As a raw material for making Plaster of Paris. Plaster of Paris is called so,
because the gypsum that was used to manufacture it came from a village called
Montamarte, near Paris. It is used extensively in construction purposes.
2. Grounded gypsum (land plaster) is sometimes used as a fertilizer for soil that
needs calcium.
3. Raw gypsum is also used to keep Portland cement from hardening too quickly.
4. It is also used to make paint (as a filler), filters, insulation and wall plaster.
5. Alabaster is used for carving ornaments and vases.
6. Selenite is sometimes used as an optical material.
Gypsum produced for dental application is nearly pure calcium sulfate dihydrate.
DENTAL USES OF GYPSUM PRODUCTS:
• Impression plaster is used to make the impression of the edentulous mouth.
• For preparation of study models of oral and maxillofacial structures.
• To form cast and dies on which dental prosthesis are constructed.
• As a mold material for processing complete dentures.
• For mounting of casts on the articulator.
• Also used as a binder for silica, gold alloy casting investment, soldering
investment and investment for low melting point nickel-chromium alloys.
4. GYPSUM PRODUCTS:
• Refers to the various forms of calcium sulfate, hydrous and anhydrous.
• Manufactured by the calcination of calcium sulfate dihydrate.
• Calcination can be controlled to produce partial or complete dehydration.
ADA No: 25.
ISO No: 6873.
Gypsum products can be classified into five types:
GYPSUM PRODUCTS
IMPRESSION PLASTER
( ISO TYPE I )
PLASTER
( ISO TYPE II )
HIGH STRENGTH PLASTER
STONE
( ISO TYPE III )
STONE, HIGH STRENGTH,
LOW EXPANSION
( ISO TYPE IV )
STONE, HIGH STRENGTH,
HIGH EXPANSION
( ISO TYPE V )
5. CHEMISTRY OF GYPSUM:
In the temperature range of 20º to 700ºC that is important in dental manipulation of
gypsum products, three phase changes occur in the CaSO4-H2O system.
40º – 50ºC
1) CaSO4.2H2O
CaSO4.1/2H2O + Water
(Calcium Sulfate
Hemihydrate)
90º – 100ºC
2) CaSO4.1/2H2O
γ-CaSO4
+ Water
(Hexagonal Form)
(Soluble anhydrite)
300º – 400ºC
3) γ-CaSO4
CaSO4
(Orthorhombic CaSO4)
(Insoluble anhydrite)
MONOCLINIC
HEXAGONAL ORTHORHOMBIC
Calcium Sulfate Hemihydrate Soluble anhydrite Insoluble anhydrite
Calcium Sulfate Dihydrate
6. MANUFACTURE:
From the conversion temperature given before, it can be seen that calcium sulfate
hemihydrate would be produced by heating gypsum to temperatures in the range of 50o
to 90 oC. However, at these temperatures the reaction is slow; even at 90oC substantially
complete conversion takes about 12 hours (Khalil et. al., 1971). Therefore, in
commercial processes temperatures higher than this are used, for shorter times.
The stable phase at these higher temperatures is hexagonal calcium sulfate, so the initial
product of calcination is partly of very largely this anhydrous form. However, on cooling
to temperatures below 85 oC and exposure to atmospheric moisture, the hexagonal
calcium sulfate rehydrates to form the hemihydrate.
In the production of plaster, the gypsum is ground to a fine powder, impurities such as
sulphur (S) and quartz (SiO2) are removed, and then it is subjected to calcination.
dehydration by heat
or other means
Mineral Gypsum
Plasters
Synthetic Gypsum
formulation
Dental plaster
Hydrocal
Densite
Dental Stone
High strength
dental stone
7. MANUFACTURE:
From the conversion temperature given before, it can be seen that calcium sulfate
hemihydrate would be produced by heating gypsum to temperatures in the range of 50o
to 90 oC. However, at these temperatures the reaction is slow; even at 90oC substantially
complete conversion takes about 12 hours (Khalil et. al., 1971). Therefore, in
commercial processes temperatures higher than this are used, for shorter times.
The stable phase at these higher temperatures is hexagonal calcium sulfate, so the initial
product of calcination is partly of very largely this anhydrous form. However, on cooling
to temperatures below 85 oC and exposure to atmospheric moisture, the hexagonal
calcium sulfate rehydrates to form the hemihydrate.
In the production of plaster, the gypsum is ground to a fine powder, impurities such as
sulphur (S) and quartz (SiO2) are removed, and then it is subjected to calcination.
dehydration by heat
or other means
Mineral Gypsum
Plasters
Synthetic Gypsum
formulation
Dental plaster
Hydrocal
Densite
Dental Stone
High strength
dental stone