Comparison Of Dental Materials
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COMPARISON OF DENTAL MATERIALS BASIS OF COMPARISON COMPONENTS:
SOLUBLE PLASTER
MODELING COMPOUND
•
80% PLASTER OF PARIS o main component
•
BEESWAX
•
K2SO4 o slow setting time and setting expansion o 0.15% - setting expansion POTATO STARCH o Makes the plaster “soluble” o Swells when immersed in warm water bath making it easier to be removed Coloring materials/pigments
•
THERMOPLASTIC RESIN
•
•
o
Responsible for thermoplastic property
ZOE IMPRESSION PASTE o
TUBE 1
UNIVERSAL/BASE PASTE
ZnO (zinc oxide) •
•
GUTTA PERCHA, SHELLAC, STEARIC ACID o
•
•
Dilutes eugenol to relieve soft tissues from burning sensation
•
Serves as plastisizer for improved workability
To improve working property
FRENCH CHALK, TALC, DIATOMACEOUS EARTH o
Mineral oil/fixed vegetable oil
PLASTISIZER
•
Hardening agents/fillers
Coloring materials or pigments
Hydrogenated rosin •
o
Responsible for the paste form
TUBE 2
CATALYST REACTOR/ACCELERATOR PASTE
Eugenol/oil of cloves •
•
Increase flow property
•
Improve mixing of ZOE paste
Calcium Chloride Accelerating agent
Lanolin
•
Fillers or hardening agents
Peru/Canada Balsam
•
70% - 80% eugenol content
French chalk •
1
main component
Improve the body & strength of ZOE paste
Olive oil
•
BASIS OF COMPARISON MANIPULATION METHOD/S:
SOLUBLE PLASTER •
•
Adding at least half an inch of base
o
•
Shaped like the base of the cast and material is the same as of the rubber bowl
o
alcohol lamp, torch, Bunsen burner
o
Squeeze in equal amount and size o
50°C - 70°C
•
•
50% base and 50% catalyst
Rotatory mixing movement using stainless steel cement spatula o
When there is only one color, there is a homogenous mixture
Folding motion with speed o
2
Mixing time is 1 min
Water bath
Ratio of type 1&2 paste is 1:1
•
MOIST HEAT o
o
Glass slab, oilimpervious/oil-resistant
open flame
Invert the tray
USE OF RUBBER BASE FORMER
ZOE IMPRESSION PASTE •
DRY HEAT
INVERSION o
•
•
BOXING o
MODELING COMPOUND
Dilute eugenol to relieve soft tissues from burning sensation
To check if mixture is completely homogenous basing on the color
USES:
•
SECONDARY IMPRESSION MATERIAL
•
Making TYPE I
•
Preliminary Impression Material
•
o SURGICAL DRESSING Dressing to allow healing: medicament that covers the wound from debris
Stock tray o
Remove from patient’s mouth by teasing
•
no need for separating medium because they are made of different materials
•
produces Study Cast (Plaster of Paris)
OCCLUSION RIM
o
Made up of pink wax where the pontic is planted o TEMPORARY FILLING MATERIAL Test if the tooth will respond to the filling favorably
Has medicinal advantage
Cheaper
Used when there’s pain, when time is not enough and when there is rampant caries INITIAL SETTING TIME: BASIS OF COMPARISON FINAL SETTING TIME:
1 – 3 minutes SOLUBLE PLASTER
•
•
SEPARATING MEDIUM: DIMENSIONAL CHANGE: DISPENSING FORM:
•
No K2SO4 • 20 minutes
•
Dimensionally stable, strong enough Copies the object accurately Yes
• • •
Poor thermal conductors Good flow property Can be a source of error or disadvantage because it may lead to distortion
• •
•
10mins
TYPE 2 Soft set o
0.15% EXPANSION POWDER FORM
TYPE 1 Hard set o
3 – 5 minutes
Not powdery No bubbles
•
ZOE IMPRESSION PASTE •
• •
•
MODELING COMPOUND
K2SO4 •
CHARACTERISTICS :
3-6 minutes
15mins
1000lbs compressive strength has good flow properties copies detailed parts
no
No
0.3 – 0.4% SHRINKAGE
0.1% SHRINKAGE (NEGLIGIBLE)
•
CAKE FORM o
•
For full arch impression
CONE/STICK FORM o
3
For single tooth
•
PASTE FORM
impression o
TRAY USED:
For tracing material to convert the defect of cake
INDIVIDUAL TRAY
STOCK TRAY
INDIVIDUAL TRAY
CAST PRODUCED:
STUDY CAST
STUDY CAST
WORKING CAST
ACCORDING TO HARDENING OR SETTING: ACCORDING TO APPLICATION OR MECHANICAL PROPERTIES:
THERMOSET
THERMOPLASTIC
THERMOSET
RIGID
RIGID
RIGID
DIFFERENT TYPES OF SEPARATING MEDIUM:
•
PINK ALGINATE
•
SOAP SUDS
•
VARNISH
Rosette Go 121508
4
SOLUBLE PLASTER
MODELING COMPOUND
•
80% PLASTER OF PARIS o main component
•
BEESWAX
•
K2SO4 o slow setting time and setting expansion o 0.15% - setting expansion POTATO STARCH o Makes the plaster “soluble” o Swells when immersed in warm water bath making it easier to be removed Coloring materials/pigments
•
THERMOPLASTIC RESIN
•
•
o
Responsible for thermoplastic property
ZOE IMPRESSION PASTE o
TUBE 1
UNIVERSAL/BASE PASTE
ZnO (zinc oxide) •
•
GUTTA PERCHA, SHELLAC, STEARIC ACID o
•
•
Dilutes eugenol to relieve soft tissues from burning sensation
•
Serves as plastisizer for improved workability
To improve working property
FRENCH CHALK, TALC, DIATOMACEOUS EARTH o
Mineral oil/fixed vegetable oil
PLASTISIZER
•
Hardening agents/fillers
Coloring materials or pigments
Hydrogenated rosin •
o
Responsible for the paste form
TUBE 2
CATALYST REACTOR/ACCELERATOR PASTE
Eugenol/oil of cloves •
•
Increase flow property
•
Improve mixing of ZOE paste
Calcium Chloride Accelerating agent
Lanolin
•
Fillers or hardening agents
Peru/Canada Balsam
•
70% - 80% eugenol content
French chalk •
1
main component
Improve the body & strength of ZOE paste
Olive oil
•
BASIS OF COMPARISON MANIPULATION METHOD/S:
SOLUBLE PLASTER •
•
Adding at least half an inch of base
o
•
Shaped like the base of the cast and material is the same as of the rubber bowl
o
alcohol lamp, torch, Bunsen burner
o
Squeeze in equal amount and size o
50°C - 70°C
•
•
50% base and 50% catalyst
Rotatory mixing movement using stainless steel cement spatula o
When there is only one color, there is a homogenous mixture
Folding motion with speed o
2
Mixing time is 1 min
Water bath
Ratio of type 1&2 paste is 1:1
•
MOIST HEAT o
o
Glass slab, oilimpervious/oil-resistant
open flame
Invert the tray
USE OF RUBBER BASE FORMER
ZOE IMPRESSION PASTE •
DRY HEAT
INVERSION o
•
•
BOXING o
MODELING COMPOUND
Dilute eugenol to relieve soft tissues from burning sensation
To check if mixture is completely homogenous basing on the color
USES:
•
SECONDARY IMPRESSION MATERIAL
•
Making TYPE I
•
Preliminary Impression Material
•
o SURGICAL DRESSING Dressing to allow healing: medicament that covers the wound from debris
Stock tray o
Remove from patient’s mouth by teasing
•
no need for separating medium because they are made of different materials
•
produces Study Cast (Plaster of Paris)
OCCLUSION RIM
o
Made up of pink wax where the pontic is planted o TEMPORARY FILLING MATERIAL Test if the tooth will respond to the filling favorably
Has medicinal advantage
Cheaper
Used when there’s pain, when time is not enough and when there is rampant caries INITIAL SETTING TIME: BASIS OF COMPARISON FINAL SETTING TIME:
1 – 3 minutes SOLUBLE PLASTER
•
•
SEPARATING MEDIUM: DIMENSIONAL CHANGE: DISPENSING FORM:
•
No K2SO4 • 20 minutes
•
Dimensionally stable, strong enough Copies the object accurately Yes
• • •
Poor thermal conductors Good flow property Can be a source of error or disadvantage because it may lead to distortion
• •
•
10mins
TYPE 2 Soft set o
0.15% EXPANSION POWDER FORM
TYPE 1 Hard set o
3 – 5 minutes
Not powdery No bubbles
•
ZOE IMPRESSION PASTE •
• •
•
MODELING COMPOUND
K2SO4 •
CHARACTERISTICS :
3-6 minutes
15mins
1000lbs compressive strength has good flow properties copies detailed parts
no
No
0.3 – 0.4% SHRINKAGE
0.1% SHRINKAGE (NEGLIGIBLE)
•
CAKE FORM o
•
For full arch impression
CONE/STICK FORM o
3
For single tooth
•
PASTE FORM
impression o
TRAY USED:
For tracing material to convert the defect of cake
INDIVIDUAL TRAY
STOCK TRAY
INDIVIDUAL TRAY
CAST PRODUCED:
STUDY CAST
STUDY CAST
WORKING CAST
ACCORDING TO HARDENING OR SETTING: ACCORDING TO APPLICATION OR MECHANICAL PROPERTIES:
THERMOSET
THERMOPLASTIC
THERMOSET
RIGID
RIGID
RIGID
DIFFERENT TYPES OF SEPARATING MEDIUM:
•
PINK ALGINATE
•
SOAP SUDS
•
VARNISH
Rosette Go 121508
4
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