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Can anybody help me solving the following questions?
1. Precipitation of salivary calcium salts to form calculus is
A. promoted by a higher buffering capacity.
B. inhibited by a higher buffering capacity
C. inhibited by higher pH.
D. promoted by a higher pH.
2. irregularly distributed shallow to moderate craters in the interseptal bone are best eliminated by
A. osteoplasty
B. gingivoplasty
C. deep scaling
C. bone grafting.
3. Dental caries is ssociated with
1. certain strains of streptococci.
2. certain strains of staphylococci.
3. certain strains of lactobaccilli.
4. gram negative rods and certain anaerobic bacteria.
A. (1) (2) (3)
B. 1 and 3
C. 2 and 4
D. 4 only
E. all of the above
4. In an edentulous maxilla, the direction of resorptiom of the alveolar ridge is
A. upward and palatally
B. upward and facially
C. uniform in all directions.
D. upward only
5. Dental porcelain has
1. low compressive strength
2. high hardnes
3. high tensile strength
4. low impact strength.
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. all of the above
6. The coefficient of thermal expansion of composite resin is
A. greater than that of enamel
B. the same as that of enamel
C. less than that of enamel
D. the same as that of amalgam
E. the same as that of glassionomer cement
7. In complete dentures, the external oblique line is used as a guide for the
A. position of posterior teeth
B. height of occlusal plane
C. termination of the buccal flange
D. termination of lingual flange
8. Filters are placed in the path of x-ray beam to
A. increase contrast
B. reduce film density
C. reduce exposure time.
D. reduce patient radiation dose
9. The extension of the lingual anterior border of a mandibular denture is limited by the
A. mylohyoid muscle
B. geniohyoid muscle
C. genioglossus muscle
D. fibers of digastric muscle
10. Premature los of a primary maxillary second molar usually produces a malocclusion in the permanent dentition that is characterized by
A. anterior crowding
B. labially displaced maxillary canines
C. delayed eruption of permanent molar
D. a Class II molar relationship on affected site
E. a class III molar relationship on the affected site
11. Acid etching of dentin with 10-15% phosphoric acid for 10-15 sec
1. removes smear layer
2. increase dentinal permeability
3. opens dentinal tubules
4. decalcifies the intertubular and peritubular dentin
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. allof the above
12. In order to acheive a proper interproximal contour when using a spheriacl alloy, which of the following is/ are essential
1. A large sized condensar
2. A thinner matrux band
3. An anatomical wedge
4. Use of mechanical codensation
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. All of the above
Any help will be appreciated.
1. Precipitation of salivary calcium salts to form calculus is
A. promoted by a higher buffering capacity.
B. inhibited by a higher buffering capacity
C. inhibited by higher pH.
D. promoted by a higher pH.
2. irregularly distributed shallow to moderate craters in the interseptal bone are best eliminated by
A. osteoplasty
B. gingivoplasty
C. deep scaling
C. bone grafting.
3. Dental caries is ssociated with
1. certain strains of streptococci.
2. certain strains of staphylococci.
3. certain strains of lactobaccilli.
4. gram negative rods and certain anaerobic bacteria.
A. (1) (2) (3)
B. 1 and 3
C. 2 and 4
D. 4 only
E. all of the above
4. In an edentulous maxilla, the direction of resorptiom of the alveolar ridge is
A. upward and palatally
B. upward and facially
C. uniform in all directions.
D. upward only
5. Dental porcelain has
1. low compressive strength
2. high hardnes
3. high tensile strength
4. low impact strength.
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. all of the above
6. The coefficient of thermal expansion of composite resin is
A. greater than that of enamel
B. the same as that of enamel
C. less than that of enamel
D. the same as that of amalgam
E. the same as that of glassionomer cement
7. In complete dentures, the external oblique line is used as a guide for the
A. position of posterior teeth
B. height of occlusal plane
C. termination of the buccal flange
D. termination of lingual flange
8. Filters are placed in the path of x-ray beam to
A. increase contrast
B. reduce film density
C. reduce exposure time.
D. reduce patient radiation dose
9. The extension of the lingual anterior border of a mandibular denture is limited by the
A. mylohyoid muscle
B. geniohyoid muscle
C. genioglossus muscle
D. fibers of digastric muscle
10. Premature los of a primary maxillary second molar usually produces a malocclusion in the permanent dentition that is characterized by
A. anterior crowding
B. labially displaced maxillary canines
C. delayed eruption of permanent molar
D. a Class II molar relationship on affected site
E. a class III molar relationship on the affected site
11. Acid etching of dentin with 10-15% phosphoric acid for 10-15 sec
1. removes smear layer
2. increase dentinal permeability
3. opens dentinal tubules
4. decalcifies the intertubular and peritubular dentin
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. allof the above
12. In order to acheive a proper interproximal contour when using a spheriacl alloy, which of the following is/ are essential
1. A large sized condensar
2. A thinner matrux band
3. An anatomical wedge
4. Use of mechanical codensation
A. 1,2,3
B. 1,3
C. 2,4
D. 4 only
E. All of the above
Any help will be appreciated.
