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BREDENT MODELS & DUPLICATING SUPPORT
Exakto-Form Resin
INSTRUCTIONS FOR USE EXAKTO-FORM MODEL RESIN
Dual component model material, based on polyurethane, for fabricating extremely precise dental models. Thanks to its very low viscosity, it is easily poured into impressions without entrapping air voids. This cost-effective model resin features absolutely precise reproduction of surfaces, dimensional stability and unequaled precision of fit with no expansion whatsoever.
- Presentation
- - Exakto-form model resin is supplied in cans containing 50 g. each of components A and B.
- - 1 assortment includes 6 x 50 g. cans components A and 6 x 50 g. cans of component B.
- - Both components are also available separately.
Directions - Application I
Always follow safety precautions!
Shake the tubs well before opening. Rip the lids off both tubs. To ensure that components A and B are mixed homogeneously, they must be stirred thoroughly before using, to mix the material which has settled.
Pour the contents of the component B tub into the tub containing component A (mixing ratio 1:1). Mix the two components thoroughly within 30 seconds. Working time is 2 to 3 minutes. Separate from impression after 30 minutes; maximum final hardness is achieved after 1.5 hours.
Application I
As this is a polyurethane based, dual-component material, it is inevitable that component B will react prematurely with the mixture in the atmosphere when the can is opened. Therefore, to prevent the moisture in the atmosphere from contacting the material for too long, and consequent premature setting, component B should be used immediately!
Directions - Application II
Should you require a small amount of Exakto-Form model resin (less than 100 g), you can fill the entire contents of tubs A & B into separate syringes and extrude the desired amount into a mixing vessel in a ratio of 1:1. Mix the two components thoroughly within 30 seconds. Working time 2-3 minutes. Separate from impression after 30 minutes. Maximum final hardness attained after 1.5 hours. Please make absolutely certain that you use the remaining material in the syringes within 2 days! Shake the tubs well before opening. Rip the lids off both cans. To ensure that components A & B are mixed homogeneously, they must be stirred thoroughly before each use to mix material which may have settled.
Application II
- Safety Measures
- " Wear protective clothing, gloves, and glasses/face mask.
- " In case of contact with the skin, wash immediately with plenty of soap and water.
- " In case of contact with the eyes, rinse immediately with plenty of soap and water and seek medical attention immediately.
- " Do not inhale vapors - use in well ventilated areas.
- " In case of an accident or sudden indisposition, seek medical attention immediately (if possible, show package label).
- " Keep out of reach of children.
- " Keep out of sewage system, inshore waters, and earth.
- " Keep away from open fire.
- " GGVE/S 6 1 code 19 c.
The general industrial hygiene precautions applying to reactive resins and their hardeners should be followed.
MATERIAL SAFETY DATA SHEET
Product Name: EXAKTO FORM MODEL RESIN COMPONENT A - RESIN
Product Code: 520 001 74, 520 002 80
Before using this product, please read and follow these instructions carefully.
1. Composition/Information on ingredients
Product Description/use: Pigments in a mixture of solvents and polyols.
Hazardous Substances:
Name: CAS-No. Content Hazard symbols Hazard codes
White Spirit --- --- --- R 10
2. Hazard Identification
Hazard codes R 10 flammable.
3. First aid procedures:
Inhalation: Plenty of fresh air and in case of complications seek medical assistance.
Skin contact: Wash skin with soap and rinse with plenty of water; in case of irritation seek medical attention.
Eye contact: Flush immediately with pure water for at least 15 minutes; seek medical attention.
Ingestion: Do not induce vomiting, and seek immediate medical attention.
Others: Remove soaked clothing immediately.
4. Fire fighting procedures:
Suitable extinguishing media: Water-spray, CO2, dry chemicals, foam.
Unsuitable extinguishing media: High-pressure water jet.
Exposure hazards: Thermal decomposition can lead to the generation of irritant vapor and/or fire.
Special equipment: Pressure demand self-contained breathing apparatus should be provided to fire fighters in buildings.
5. Accidental release procedures:
Precautions - individuals: Wear protective equipment; avoid contact with eyes and skin. Do not breathe vapor; always use in a well-ventilated area.
Precautions - environment: Stop leaks as soon as possible and avoid discharge into environment.
Cleaning up spillage: Absorb with mineral fillers (such as sand, diatomaceous earth,) and store in a well-sealed, suitable container.
6. Storage and handling:
Storage: Store in a well-sealed container in a well-ventilated room. Do not expose to temperatures exceeding 30º C; store away from food.
Handling: Avoid contact with eyes or skin; always use in a well-ventilated area; do not breathe vapor. Do not smoke. Keep away from sources of ignition.
7. Exposure control/individual protection
Individual:
Protection-hands: Protective gloves..
Protection-eyes: Protective glasses.
Protection-skin: Working coat (cotton).
General procedures with respect to individual hygiene: Avoid inhalation; avoid eye and skin contact. Do not eat, drink or smoke while.
working. After working, wash your hands with soap and water.
8. Physical and chemical properties:
Appearance:Liquid.
Color: Opaque, greenish.
Odor: Typical.
Data relevant to safety:
Acidity (pH): 10
Flash point: 42º C.
Ignition point: 420º C.
Self-inflammation: None.
Vapor pressure (20º C): 7-8 mbar.
9. Stability and reactivity:
Conditions to avoid: Do not expose to temperatures exceeding 50 C or below 5º C.
Materials to avoid: Avoid direct contact to strong oxidants or isocyanates.
Hazardous decomposition products: Thermal decomposition leads to the generation of irritant vapors.
10. Toxicological information:
Toxicological evaluation: The toxicological properties have not been fully determined.
Irritating properties: Direct contact with skin or eyes may cause irritation or reddening.
Sensitization: None have been reported yet.
Carcinogenic, teratogenic, or mutagenic effects: None have been reported yet.
11. Ecological information:
Avoid discharge into the environment.
12. Disposal consideration:
Product/Soiled container: Both need to be classified as chemical waste material and disposed of in agreement with your local and national legislation.
13. Export regulation
By land:
ADR/RID/GGVS/GGVE class: 3 No./Letter: 31.c)
Warning symbol: F Hazard No.: 30 Material No.: 1993
By air:
ICAO/IATA class: 3 UN/ID No.: 1993 Verp. Grp.: III/309
Correct technical name: White spirit.
14. Regulatory information:
Hazard symbol and identification: Flammable.
Hazard codes: R 10 Flammable.
Safety codes: S 16 Keep away from sources of ignition.
S 24/25 Avoid contact with eyes or skin.
15. Other information
Data sheet completed by: Research & Development Dept. - Bredent (Germany).
This Material Safety Data Sheet is provided by way of guide for the use of our product and is
correct to the best of our knowledge.
However, we can't offer any guarantee as to its accuracy or
exhaustiveness. All chemicals may present unforeseen risks and should be used with caution.
We cannot guarantee that the risks referred above are the only risks present. The final choice of the application of a
product is thus the sole responsibility of the user.
MATERIAL SAFETY DATA SHEET
Product Name: EXAKTO FORM MODEL RESIN COMPONENT B - HARDENER
Product Code: 520 001 73, 520 002 80
Before using this product, please read and follow these instructions carefully.
1. Composition/Information on ingredients
Product Description/use: Hardener of a two compound model resin.
Name: CAS-No. Content Hazard symbols Hazard codes.
Dyphenylmethane-4,4' 101-68-8 Xn R 20; 36/37/38; 42
Diisocyanate.
2. Hazard Identification
Hazard codes: R 20 Harmful by inhalation.
R 36/37/38 Irritating to eyes, respiratory system & skin.
R 42 Sensitization may be caused by inhalation.
3. First aid procedures:
Inhalation: Plenty of fresh air and in case of complications seek medical assistance.
Skin contact: Wash skin with soap and rinse with plenty of water; in case of irritation seek medical attention.
Eye contact: Flush immediately with pure water for at least 15 minutes; seek medical attention.
Ingestion: Do not induce vomiting, and seek immediate medical attention.
Others: Remove soaked clothing immediately.
4. Fire fighting procedures:
Suitable extinguishing media: Water spray, CO2, dry chemicals, foam.
Unsuitable extinguishing media: High-pressure water jet.
Exposure hazards: High temperatures lead to the generation of irritant vapor and/or fire.
5. Accidental release procedures:
Precautions - individuals: Wear protective equipment; avoid contact with eyes and skin. Do not breathe vapor; always use in a well-ventilated area.
Precautions - environment: Stop leaks as soon as possible and avoid discharge into environment.
Cleaning up spillage: Absorb with mineral fillers (such as sand, diatomaceous earth,) and store in a well-sealed suitable container.
6. Storage and handling:
Storage: Store in a well-sealed glass container in a dry, well-ventilated room. Store at temperatures between 18 and 22º C; store away from food.
Handling: Avoid contact with eyes or skin; always use in a well-ventilated area; do not breathe vapor. Do not smoke.
7. Exposure control/individual protection
Constituents with limits relevant to the work area:
CAS-No.: Description: Type Value Unit
101-68-8 Diphenylmethane-4,4'-diisocyanate MAK 0.05 ppm
Individual:
Protection-hands: Protective gloves.
Protection-eyes: Protective glasses are recommended.
Protection-skin: Working coat (cotton).
General procedures with respect to individual hygiene: Avoid inhalation; avoid eye and skin contact. Do not eat, drink or smoke while working. After working, wash your hands with soap and rinse with water thoroughly.
8. Physical and chemical properties:
8. Physical and chemical properties
Appearance: Opaque liquid.
Color: Yellowish.
Odor: Typical.
Data relevant to safety:
Flash point: > 100º C.
Ignition point: 240º C.
Self-inflammation: No.
Vapor pressures (20º C): 8 mbar.
Specific density (20 C): 1.76 g/ml.
9. Stability and reactivity:
Conditions to avoid: Avoid temperatures exceeding 30 C and below 18º C.
Materials to avoid: Avoid peroxides, amins, alcohols and water.
Hazardous decomposition products: Reaction with water in a sealed container may cause a rising pressure and leads to the explosive destruction of the container.
10. Toxicological information:
Toxicological evaluation:
Acute toxicity:
LD50/LC50: Substance Species Kind of exposure
15000 mg/kg Diphenylmethane- Rat Oral
4,4'-diisocyanate
Irritating properties: Irritates mucous membranes, eyes and skin.
Sensitization: May cause sensitization symptoms like asthma.
Carcinogenic, teratogenic, or mutagenic effects: None have been reported yet.
11. Ecological information:
Avoid discharge into the environment.
12. Disposal consideration:
Product: This product needs to be classified as chemical waste material and disposed of in agreement with your local and national legislation.
Soiled container: Empty the bottle entirely; then dispose of in agreement with your local and national legislation.
13. Export regulation
Transport: Non-regulated.
14. Regulatory information:
Hazard symbol & identification: Xi = Irritant; F = Highly Flammable.
Hazardous substances: Methyl methacrylate.
Hazard codes: R 11 Highly flammable.
R 36/37/38 Irritates eyes, respiratory organs, and skin.
R 43 Direct skin contact may cause sensitization.
Safety codes: S 9 Store in well ventilated rooms only.
S 16 Avoid direct contact with sources of ignition-do not smoke.
15. Other information
Data sheet completed by: Research & Development Dept. - Bredent (Germany).
This Material Safety Data Sheet is provided by way of guide for the use of our product and is
correct to the best of our knowledge.
However, we can't offer any guarantee as to its accuracy or
exhaustiveness. All chemicals may present unforeseen risks and should be used with caution.
We cannot guarantee that the risks referred above are the only risks present. The final choice of the application of a
product is thus the sole responsibility of the user.
1.Prior to mixing, each component must be stirred so that a homogeneous mixture is obtained. Mix the sediment completely.
2.Add component A to component B; empty tin completely.
3.Mix Exakto-Form approximately 30 seconds until a uniform color is obtained.
4.Two tins of Exakto-Form are sufficient to produce 2-3 complete dental arches.
5.The material can be removed after 30 minutes. Final hardness is achieved after 90 minutes. Then the model can be trimmed.
6.If a base for the model is to be produced with Exakto-Form, the model must first be insulated with Exakto-Form Insulating Liquid.
7.Due to its high edge stability, Exakto-form is perfectly suitable for precision-fit bridge and crown work.
8.Any technique can be used for sawing Exakto-Form models. Adopting a new technique is not required.
9.If smaller quantities are used, fill component A and B into separate syringes.
10.Pour equal quantities of Exakto-Form into a silicone beaker (approximately 2 ml for one die) and mix to obtain a homogeneous material. Please note, material in syringes must be used within 5 days.
11.Pour Exakto-Form into the impression. The excellent flow properties prevent the formation of bubbles even in impressions with thin edges.
12.The hardened resin can be drilled and trimmed. The stability avoids dimensional changes and guarantees precise models.
Exaktosil N 21 Duplicating Silicone
Exaktosil N 21 Duplicating Silicone Kit
- Pouring silicone for the duplication of models.
- Components A and B are mixed in a 1:1 ratio. The components are stirred until they are evenly mixed.
- Then power mix under vacuum for 30 seconds.
Exaktosil Silicone features particularly low shrinkage and virtually bubble-free duplicating molds.
Model can be de-molded after 30-40 minutes.
One of the advantages of Exaktosil is its excellent reproduction of detail.
Exaktosil consistent quality ensures precision accuracy when duplicating.
Multisil-Mask Soft
Quick and economical processing with the cartridge and the specially adjusted silicone allow trouble-free direct application into the impression or the matrix. The natural color of the gingival mask supports perfect shade determination of the veneer. Overdimensioning of margins is recognized immediately.
The gingival situation on the unsawed sawcut model...
...is reproduced using Exaktosil C kneading silicone and then the arch is sawed.
The sawcut are coated with wax.
Openings (inlet & outlet) are drilled into the matrix using the locating matrix drill and Multi-Sep is applied.
The dispensing device with cartridge and canula is held to the opening. While applying the material from the dosing device, the matrix is fixed on the model...
...to obtain the correct position of the gingival mask.
