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Impression Materials

Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?

Dental Materials, Impression Materials, Medical Mcqs /
Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?

A. Addition silicone < polyether < polysulfide < condensation silicone
B. Addition silicone < polysulfide < Polyether < condensation silicone
C. condensation silicone < polyether < polysulfide < Addition silicone
D. condensation silicone < polysulfide < polyether < Addition silicone

Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ? Read More »

Dental Materials, Impression Materials, Medical Mcqs

Which of the following best describes the working time of impression material ?

Dental Materials, Impression Materials, Medical Mcqs /
Which of the following best describes the working time of impression material ?

A. After the start of appearing elastic properties of impression material
B. Just after the start of appearing elastic properties of impression material
C. The time for start of mixing till just before the start of appearing elastic properties of impression material
D. Loss of lusture of impression material

Which of the following best describes the working time of impression material ? Read More »

Dental Materials, Impression Materials, Medical Mcqs

Which of the following is correct regarding chemical setting of condensation silicone_______________?

Dental Materials, Impression Materials, Medical Mcqs /
Which of the following is correct regarding chemical setting of condensation silicone_______________?

A. Polymerization occurs with repeated elimination of small molecules
B. Polymerization occurs with elimination of single byproduct
C. By condensation of repeated molecules of monomers
D. Condensation does not occur at all

Which of the following is correct regarding chemical setting of condensation silicone_______________? Read More »

Dental Materials, Impression Materials, Medical Mcqs

Dimensional stability of hydrocolloid impressions may be achieved by_________________?

Dental Materials, Impression Materials, Medical Mcqs /
Dimensional stability of hydrocolloid impressions may be achieved by_________________?

A. Using less water powder ratio
B. Storing the impression under water
C. Prolonged manipulation
D. Using humidor

Dimensional stability of hydrocolloid impressions may be achieved by_________________? Read More »

Dental Materials, Impression Materials, Medical Mcqs

The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?

Dental Materials, Impression Materials, Medical Mcqs /
The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?

A. Boiling
B. Condensation
C. Vulconization
D. Chain lengthening

The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________? Read More »

Dental Materials, Impression Materials, Medical Mcqs

Which of the following is not true about elastomeric impression ?

Dental Materials, Impression Materials, Medical Mcqs /
Which of the following is not true about elastomeric impression ?

A. Single mix material have higher viscosity
B. Shear thinning is related to viscosity of non phase impression material
C. Improper mixing of material can cause permanent deformation of impression
D. Putty – wash technique of impression reduces dimensional change of setting

Which of the following is not true about elastomeric impression ? Read More »

Dental Materials, Impression Materials, Medical Mcqs