Rubber Base Impression Material Slideshare

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Rubber base impression material slideshare.

The elastic properties of these elastomeric impression materials improve with an increase in curing time in the mouth. 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. Read before the academy of denture prosthetics columbus ohio may 3 1957. The introduction of rubber based polysulfide impression materials was followed by silicone based materials both of which are still in use.

Earlier materials base and catalyst tubes present materials cartridges. Addition silicone was introduced as a dental impression material 1988. Polyether impression material developed in germany 1970s. Impression a dental impression is a negative record of the tissues of the mouth.

Accuracy can be improved by flaming surface material disadvantages. Omniflex rubber base impression material bulk package fast set gc america inc. Till now the elastomeric impression materials are divided into 3 types based on the material used. Elastic impression materials 1.

Development of rubber base impression materials polysulphides and condensation silicones 1960s. Classification of elastomeric impression materials. Impression materials a brief introduction dr saransh malot 2. Dean marquette university school of dentistry.

Distortion due to poor dimensional stability. Compress soft tissue while making impression. An impression material sustains some deformation as it is removed from the mouth but it must rebound to its pre removal dimensions. 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.

Latest addition and light cure elastomers 1990 2000. It is used to register or reproduce the form and relationship of teeth and surrounding tissues. Difficult to remove if there are undercuts. 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.

123 1234 123 1234 1231234 071231234 07 123 1234. Following these elastic polyether impression materials were introduced followed in recent times by polyvinylsiloxane impression materials. 735 north water st. An impression with a sufficiently high elastic limit should not sustain permanent deformation.

Impression material any substance or combination of substances used for making an impression or negative reproduction. New auto devices and. Material can be reused several times.