Competitive Dental Cements MCQs ( Dental Materials ) MCQs – New Medical MCQs
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Latest Medical MCQs
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Latest Dental Cements MCQs ( Dental Materials ) Mcqs
The most occurred mcqs of Dental Cements MCQs ( Dental Materials ) in past papers. Past papers of Dental Cements MCQs ( Dental Materials ) Mcqs. Past papers of Dental Cements MCQs ( Dental Materials ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Dental Cements MCQs ( Dental Materials ) Mcqs. The Important series of Dental Cements MCQs ( Dental Materials ) Mcqs are given below:
Glass ionomer cements are composed of______________?
A. Zinc oxide powder and phosphoric acid
B. Aluminosillicate powder and polyacrylate
C. Alumino silicate powder and phosphoric acid
D. Zinc oxide powder and polyacrylate liquid
Minimum thickness for type I zinc phosphate cement should be_______________?
A. 50 microns
B. 25 microns
C. 15 microns
D. 100 microns
Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
A. Chemical bond to tooth structure
B. Polyacrylic acid is liquid
C. Chelation
D. Substitution o eugenol by EBA to increase strength of cement
The addition of which of the following can accelerate the setting time of zinc oxide cement_____________?
A. Zinc acetate
B. Zinc sulphate
C. Barium sulphate
D. Barium chloride
pH of fully set zinc phosphate______________?
A. 4-5
B. 3-4
C. 6-7
D. 7-8
Which of the following cements is most irritant to pulpal tissues ?
A. Glass ionomer
B. Silicate
C. Zinc phosphate
D. Polycarboxylate
PH of polycarboxylate liquid is____________?
A. 7
B. 5
C. 8
D. 1.7
When selection the colour of cement to use for cementing a porcelain jacket crown, the powder being tested is best mixed with______________?
A. Glycerin-water solution
B. Alcohol
C. Cement liquid
D. Only water
The setting of zinc phosphate may be retarded by ?
A. Diluting the liquid with water
B. Increased in the ratio of powder to liquid
C. Increase the addition of powder to liquid
D. Decrease the addition of powder to liquid
Thickness of luting cement is_____________?
A. 20-40μ
B. 60-80μ
C. 10-20μ
D. 1-2μ
The chief advantage of zinc phosphate cement is its___________?
A. Lack of irritation
B. Film thickness
C. Good compressive strength
D. Low solubility
Which of the following cements is most biocompatible with pulp ?
A. Copper cement
B. GIC
C. Zinc phosphate cement
D. Zinc oxide eugenol cement
The major component of zinc phosphate cement is_____________?
A. Zinc oxide
B. Zinc
C. Phosphoric acid
D. None of the above
Polycarboxylate cement is used for_____________?
A. Permanent restoration
B. Leuting
C. Temporary restoration
D. Die material
The dual cure cements should not be used with light transmitting prostheses thicker than____________?
A. 1.5 mm
B. mm
C. mm
D. 2.5 mm
Which of the following is most important in strength ZOE_____________?
A. Liquid powder ratio
B. Speed of mixing
C. Temperature of mixing stab
D. Addition of few drops of water
The effect of zinc oxide-eugenol on the pulp ?
A. Encourages pulpal fibrosis
B. Is irritating
C. Is sedating
D. Has no effect
Best marginal seal is provided by____________?
A. Gutta-percha
B. Zinc oxide eugenol
C. Zinc phosphate
D. Resin
Secondary caries is least likely seen with_______________?
A. Silicate cement
B. Polycarboxylate
C. Zinc phosphate
D. GIC
Most preferable cement for temporary restoration______________?
A. Ca(OH)2
B. ZOE
C. GIC
D. Zinc polycarboxylate cement
Why GIC is best restorative material in children_____________?
A. Good marginal integrity
B. High strength
C. It can bond enamel & dentin
D. It has less occlusal wear
The setting of zinc phosphate is accelerated by_____________?
A. Adding a drop of water
B. Cooling the slab
C. Increasing mixing time
D. Adding a drop of oleic acid
Direct Filling Gold MCQs
PH of which cement remain below 7 even after 1 month after insertion into the cavity ?
A. Glass Ionomer Cement
B. Resin cement
C. Zinc Phosphate
D. Silicate cement
The most commonly used, most biocompatible and adhesive cement is______________?
A. Zinc oxide eugenol
B. Zinc phosphate
C. Calcium hydroxide
D. Glass ionomer
Torsional force is_______________?
A. Tensile force
B. Compression
C. Shear
D. Transverse bending force
All of the following is used as accelerator in zinc oxide eugenol cement except_______________?
A. Zinc acetate dehydrate
B. Acetic acid
C. Calcium chloride
D. Bromoglycerine
The principal constituent of set silicate cement matrix is_______________?
A. Hydrate Aluminosilicate gel
B. Hydrated Aluminium Phosphate with calcium fluoride
C. Hydrated Aluminium phosphate
D. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel
Age hardening is a process done at______________?
A. Heating up to 200 – 450°C for 15 – 30 min and quenching in water
B. Heating at 700°C for 1 hour and quenching in water
C. Heating at 700°C for 10 – 15 min and quenching in water
D. Heating above 700°C for 30 min and quenching in water
Frozen slab technique is applicable to_____________?
A. Zinc phosphate cement
B. Zinc oxide Eugenol cement
C. Glass Ionomer cement
D. Resin cement
Which of the following acts as accelerator in Zinc oxide eugenol______________?
A. Eugenol + ZnO
B. ZnCl2 + ZnSO2
C. ZnCl2 + Eugenol
D. Zn(OH)2 + ZnO
Strength of zinc phosphate is effected by_______________?
A. Consistency of mix
B. P:L ratio
C. Temp of glass slab
D. Alteration of mixing time
Frozen slab technique of mixing zinc phosphate is used for_______________?
A. Cementing crowns
B. base
C. Temporary dressing
D. cementing orthodontic bands
About zinc oxide eugenol all are true except_______________?
A. Reaction is autocatalytic
B. ZnO is converted to Zn(OH)2
C. Water is the byproduct of reaction
D. Dehydrated ZnO reacts with dehydrated eugenol
Which glass ionomer cement develops early resistance to water intake on setting ?
A. Compomer
B. Reinforced auto care glass ionomer cement
C. Resin modified glass ionomer cement
D. Ceramic reinforced glass ionomer cement
All of the following statements are true for zinc oxide eugenol cements except______________?
A. Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour
B. Increase in temperature and humidity shorten the setting time
C. Water accelerates but heat retards the setting of zinc oxide eugenol cements
D. The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid
E. Both C & D
Advantage of zinc phosphate over GIC is______________?
A. Tensile strength
B. High compressive strength
C. High modulus of elasticity
D. Diametral strength
Cavity varnishes have_____________?
A. Low bonding to tooth
B. Average bonding to tooth
C. Excellent bonding to tooth
D. No bonding to tooth
Physical Properties MCQs
Which one of the following dental cements does not contain water as part of the composition of the liquid component ?
A. Zinc silicophosphate cement
B. Zinc oxide equgenol cement
C. Zinc Phosphate cement
D. Zinc polycarboxylate cement
Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?
A. Pure gold
B. Microfilled composite resins
C. Silver amalgam
D. Type II Glass ionomer cement
Mode of failure during dislodgement of prosthesis cemented with zinc poly carboxylate cement is usually seen at the_____________?
A. Cleavage through the cement layer
B. Cement prosthesis interface
C. Cement tooth interface
D. Fracture of tooth or prosthesis
The setting time of ZnPO4 cement can be retarded by_____________?
A. mixing powder to liquid, checked by water
B. mixing more powder to the liquid
C. slower addition of powder to liquid
D. faster addition of powder to liquid
Mechanism of adhesion of GIC restoration with tooth surface is by mean of ______________?
A. Carboxyl group
B. C=C double bond
C. Chelates with Metal Ions
D. Polymer chains
In non-eugenol pastes the constituents are mixed in______________?
A. Ethyl alcohol
B. Phosphoric Acid
C. Benzoic acid
D. None of the above
Ethoxy benzoic acid increases the strength and solubility of the cement______________?
A. Zinc oxide eugenol
B. Zinc phosphate cement
C. Polycarboxylate cement
D. Silicate cement
Which cement base has the highest modulus of elasticity ?
A. Polymer reinforced ZOE cement
B. Zinc polycarboxylate
C. Zinc phosphate
D. Glass inomer cement
The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________?
A. By altering the chemical composition of restoration materials
B. Minimize marginal leakage around restoration
C. Decreasing conduction of heat to pulp
D. By preventing penetration of corrosion products into the dentinal tubules
The average life of silicate cement restoration is______________?
A. 6 years
B. 4 years
C. 2 years
D. 8 years
All of the following are true for traditional solution liner, except_________________?
A. Do not provide thermal or electric insulation
B. Have Film thickness of 1 – 50 microns
C. It is not necessary in moderately deep cavities under glass ionomer restoration
D. Protect the pulp from reaction products leaching out of restoration
Which of the following cements bonds to tooth structure, which has an anticariogenic effect, has a degree of translucency and does not irritate the pulp ?
A. Resin cement
B. Polycarboxylate cement
C. Silicate cement
D. Glass ionomer cement
Which of the following characterizes the silicate cement______________?
A. It is pulpal irritant
B. Chemically attaches to the tooth structure
C. It is highly cariogenic
D. It produces thinnest film surface
Which of the following cements have anti cariogenic properly________________?
A. Calcium Hydroxide
B. ZOE
C. Zinc silicophosphate
D. Zinc phosphate
The principle application of zinc phosphate cement is_____________?
A. In final cementation
B. As a temporary filling material
C. As temporary cementation
D. It has less occlusal wear
Which of the following cements is contraindicated in mouth breathers_______________?
A. Silicate
B. Polycarboxylate
C. ASPA
D. Zinc phosphate
Percentage of zinc in ZOE cement is__________________?
A. 80%
B. 70%
C. 60%
D. 90%
Impression Materials MCQs
The main components is sillicophosphate cement________________?
A. Silicate and GIC
B. Zinc phosphate and GIC
C. ZOE and Silicate
D. Zinc phosphate and SIlicate
Which component of zinc oxide-eugenol cement gives its strength ?
A. Zinc acetate
B. Zinc oxide
C. Rosin
D. Oil of cloves
Which cement is irritating to the pulp ?
A. Zinc oxide-eugenol cement
B. Carboxylate cement
C. Zinc phosphate
D. Ethoxybenzoic acid
The cement Which is least soluble in oral cavity______________?
A. Polycarboxylate cement
B. Resin cement
C. Glass ionomer
D. Silico-Phosphate cement
Silicate cement is indicated in________________?
A. In the restoration of posterior tooth
B. Patients with high caries index
C. Mouth breathers
D. None of the above
Which of the following cements is most kind to pulp ?
A. Silicate
B. Polycarboxylate
C. Glass ionomer
D. Resin cement
What is the working time of zinc polyacrylate cement ?
A. 2 Minutes
B. 1 Minutes
C. 3 Minutes
D. 4 Minutes
All of the following is used as accelerator in zinc oxide eugenol cement except_____________?
A. Zinc acetate dehydrate
B. Acetic acid
C. Calcium chloride
D. Bromoglycerine
The tow cements which hold with the tooth are_______________?
A. GIC and polycarboxylate
B. ZnPO4 and silicate
C. GIC and ZnPO4
D. GIC and silicate
The logical explanation for the unique anticariogenic property of most silicate cements is______________?
A. The reduction in enamel solubility due to fluoride uptake by enamel
B. Due to the high silica content
C. That silicates show very little leakage at the margins of the restoration
D. That beryllium flux is used in silicates
Thermal conductivity of which material is close to dentin____________?
A. Composite resin
B. Silicate
C. Amalgam
D. Cavity varnish
Eugenol may be replaced in the zinc oxide eugenol cement by______________?
A. Alginic acid
B. Acetic acid
C. Phosphoric acid
D. Ortho-ethoxy acid
Which is the cement with adhesive properties ?
A. Zinc oxide eugenol
B. SIlicate
C. Zinc polycarboxylate
D. Glass ionomer
E. Both B & D
Which of the following do polycarboxylate and GIC have in common ?
A. Phosphoric acid
B. Polysiloxane
C. Polyacrylic acid
D. Ion leachable glass
Which of the following show chemical bond with enamel (Calcified tissues)______________?
A. Direct filling resins
B. Composites
C. Polycarboxylate cements
D. BIS-GMA resins in pit and fissure sealants
Increased amount of powder in zinc phosphate cement mixture will cause_______________?
A. Decreased film thickness
B. Decreased strength
C. Decreased solubility
D. Increased setting time
The temperature (in °F) of the mixing slab for silicate cements should be_____________?
A. 75 – 85
B. 65 – 75
C. 55 – 65
D. 85 – 95
Which one of the following dental cement accelerates the formation of reparative dentin ?
A. Zinc oxide
B. Calcium Hydroxide
C. Eugenol
D. Silica
Fluoride rich materials include ?
A. Glass ionomer cement
B. Silicate cement
C. Polycarboxylate cement
D. All of the above