The best way to remove a hydrocolloid impression from the patient’s mouth is____________?

A. Slight rocking of the impression to disengage it from the undercut
B. Wetting the periphery of the impression with moist cotton to break the peripheral seal
C. Sudden jerking of the impression to prevent tearing
D. Supporting the impression along with the tray to prevent disengaging of the tray alone

Related Mcqs:

A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?
A. Injecting technique
B. Laminate technique
C. Immersion technique
D. Tempering technique
Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
A. Addition polysilicone
B. Condensation polysilicone
C. Polyether
D. Polysulfide
The basic constituent of reversible hydrocolloid impression material is________________?
A. Agar
B. Alginic acid
C. Gelatin
D. alginate
Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
A. Borax
B. Water
C. Sulfates
D. Carbonates
Which of the following is true about Agar hydrocolloid impression material ?
A. Liquefies between 71 – 100°C
B. Solidfies between 50 – 70°C
C. Facilitates fabrication of metal dyes
D. Cannot register fine surface details
Which material is the most difficult to remove from the patients mouth ?
A. Metallic oxide paste
A. Silicone impression material
B. Reversible hydrocolloid
C. Impression plaster
Minimum flow of Type-I impression compound at mouth temperature is___________________?
A. 4%
B. 6%
C. 8%
D. 10%
The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?
A. Impression wax
B. Modelling compound
C. Hydro-colloid
D. Hydro cal
Alginate impression material is similar to Agar-agar impression material in the following respect________________?
A. Gelation increase in both on increase in temperature
B. Mixing time is increased to reduce the setting time
C. Deformation during removal of impression occurs due to distortion of gel fibers
D. Both can be re-used for fresh impressions
Agar impression materials differ from alginate impression materials in that the former sets by_______________?
A. Mechanical action of saliva
B. Physical change
C. Evolution
D. Chemical change