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Rubber base impression material slideshare.
Compress soft tissue while making impression.
New auto devices and.
An impression with a sufficiently high elastic limit should not sustain permanent deformation.
Accuracy can be improved by flaming surface material disadvantages.
The elastic properties of these elastomeric impression materials improve with an increase in curing time in the mouth.
Till now the elastomeric impression materials are divided into 3 types based on the material used.
Impression materials elastic chemical reactions irreversible alginate elastomers polysulphides polyethers condensation silicon addition silicon temperature change reversible agar hydrocolloid chemical reactions irreversible plaster of paris zno eugenol temperature change reversible impression compound.
Latest addition and light cure elastomers 1990 2000.
Following these elastic polyether impression materials were introduced followed in recent times by polyvinylsiloxane impression materials.
Elastic impression materials 1.
These are basically synthetic rubber based materials which were initially called as rubber impression materials but currently they are known as non aqueous elastomeric impression materials.
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Earlier materials base and catalyst tubes present materials cartridges.
Impression material any substance or combination of substances used for making an impression or negative reproduction.
Difficult to remove if there are undercuts.
Classification of elastomeric impression materials.
Material can be reused several times.
Addition silicone was introduced as a dental impression material 1988.
Impression materials a brief introduction dr saransh malot 2.
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Development of rubber base impression materials polysulphides and condensation silicones 1960s.
Omniflex rubber base impression material bulk package fast set gc america inc.
Read before the academy of denture prosthetics columbus ohio may 3 1957.
Direct inhibition direct contact with latex gloves impression are made with rubber dam in place mechanism of inhibition element sulphur react with chloroplatinic acid catalyst present in pvs impression material.
A device that is used to carry confine and control impression material while.
Dean marquette university school of dentistry.
Difficult to record.
Impression a dental impression is a negative record of the tissues of the mouth.
An impression material sustains some deformation as it is removed from the mouth but it must rebound to its pre removal dimensions.
Polyether impression material developed in germany 1970s.
The introduction of rubber based polysulfide impression materials was followed by silicone based materials both of which are still in use.
