Rubber Base Impression Material Slideshare

Lead dioxide brown or organic peroxides gray reactor 2.

Rubber base impression material slideshare. Following these elastic polyether impression materials were introduced followed in recent times by polyvinylsiloxane impression materials. Compress soft tissue while making impression. Impression a dental impression is a negative record of the tissues of the mouth. Development of rubber base impression materials polysulphides and condensation silicones 1960s.

Distortion due to poor dimensional stability. An impression material sustains some deformation as it is removed from the mouth but it must rebound to its pre removal dimensions. An impression with a sufficiently high elastic limit should not sustain permanent deformation. Latest addition and light cure elastomers 1990 2000.

The introduction of rubber based polysulfide impression materials was followed by silicone based materials both of which are still in use. Polyether impression material developed in germany 1970s. Fillers titanium dioxide 3. Material can be reused several times.

A device that is used to carry confine and control impression material while. 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. Impression material any substance or combination of substances used for making an impression or negative reproduction.

Polysulfide rubberpolysulfide rubber impression materialimpression material 7. Inaccurate portions can be remade without having to remakethe entire impression. Lmw polysulfide with two terminal and one pendant sh groups 2. New auto devices and.

Addition silicone was introduced as a dental impression material 1988. It is used to register or reproduce the form and relationship of teeth and surrounding tissues.