1
Q
1.The most common strategy for dentin bonding during the 1990s and remains popular
today
a. Three-Step, Total-Etch Adhesives
b. One-Bottle, Tolal-Etch Adhesives
c. Self-Etching Primer Systems
d. Self-Etching Adhesive
A
a. Three-Step, Total-Etch Adhesives
2
Q
- When placing a matrix band for a Class Il amalgam restoration, the gingivo-occlusal width of the band should be trimmed
a. Below the marginal ridge height
b. To be equal to the marginal ridge height
c. To be at least 1 mm greater than the expected
d. Above the marginal ridge height
e. Nor at all; its dimensions should remain as made by the manufacturer
A
c. To be at least 1 mm greater than the expected
3
Q
- What process improves the retention of the restoration and removes the smear layer from prep to allow for penetration of bonding agent into dentin?
a. Bond
b. Primer
c. acid etching
d. None of the above
A
c. acid etching
4
Q
- Instruments used for handling resins are made of:
a. Stainless steel
b. Carbon steel
c. Teflon-coated metal
d. platinum
e. gold
A
c. Teflon-coated metal
5
Q
- The term “autopolymerizing” as applied to acrylic restorations would indicate that they
are:
a. Self-curing
b. Heat is required to induce polymerization
c. They are self-curing without heat formation
d. Polymerization shrinkage occurs toward the cavity wall
e. Polymerization shrinkage is compensated for by the proper technique of application
A
a. Self-curing
6
Q
- Bonding of resins to dentin is best described as involving
a. Mechanical interlocking
b. lonic bonding
c. covalent bonding
d. van der waals forces
A
a. Mechanical interlocking
7
Q
- The abrupt change in the direction at the buccoproximal CSM done to gain resistance is
a. z-curve
b. reverse curve
c. standard curve
d. m-curve
A
b. reverse curve
8
Q
- The most important consideration for pulp protection in restorative technique is:
a. An adequate protective base
b. complete removal of caries
c. thickness of remaining dentin
d. proper sealing of the remaining dentin
A
c. thickness of remaining dentin
9
Q
- Retention form for composite resin restorations is achieved by
a. a chemical bond with the tooth
b. adhesion to the enamel and dentin
C. mechanical undercuts
d. mechanical adhesion
e. all of the choices
A
C. mechanical undercuts
10
Q
- Contraindications of composite restorations include the following EXCEPT:
a. Heavy occlusal stress
b. Poor oral hygiene
c. Composite resin sensitivity
d. class V caries lesion
e. None of the above
A
d. class V caries lesion
11
Q
- A major difference between total-etch and self etching primer dentin bonding systems
include a of the following except
a. The time necessary to apply the material(s).
b. The bond strengths to enamel.
c. The amount of smear layer removed.
d. The need for wet bonding
A
a. The time necessary to apply the material(s).
12
Q
- One purpose of fluoride varnish is to promote mineralization of the tooth.
a. TRUE
b. FALSE
A
b. FALSE
13
Q
- The principal goals of bonding are -
a. Sealing and thermal insulation
b. Esthetics and reduction of postoperative sensitivity
C. Strengthening teeth and esthetics
d. Sealing and retention
A
a. Sealing and thermal insulation
14
Q
- The following factors help reduce polymerization shrinkage of composites, EXCEPT
a. Complete elimination of moisture from the tooth surface
b. Flowable before packable composites
c. Appropriate placement of etchant, bonding on the tooth surface
d. Placing GIC before composite
A
a. Complete elimination of moisture from the tooth surface
15
Q
- Calcium hydroxide is regarded as a good pulp capping agent because
a. It stimulates reparative dentin formation
b. It creates a better cavity seal than other materials
c. Its alkaline nature is non irritating to the pulp
d. It has sedative effect on the pulp
A
a. It stimulates reparative dentin formation
16
Q
- Each of the following is a reason for beveling a preparation for restoration with
composite resins, except:
a. To expose more inorganic tooth structure
b. To increase the surface area of enamel for etching
c. To expose the ends rather than the sides of enamel rods
d. To enhance the enamo-resin marginal seal,
A
a. To expose more inorganic tooth structure
17
Q
- Put the following steps in order for proper sealant placement.
- Apply acid etch
- Place the low viscous sealant material
- Apply bonding agent
- Wash acid etch away
- Use rubber prophy cup with pumice
a. 5, 1, 4, 3, 2
b. 1, 4, 3, 2, 5
c. 2,1,4,3,5
d. 5,2,1,4,3
A
a. 5, 1, 4, 3, 2
18
Q
- Pulp protector that will minimize microleakage and will protect the pulp from chemical iritation by its sealing ability.
a.CaOh
b.ZOE
C. GIC
d. Zinc phosphate
A
a.CaOh
19
Q
- Fluorides affect the tooth structure in the following manner to make it more resistant to dental caries
I. Fluoride removes the organic component of the enamel matrix.
Il. Fluoride ions chemically react with the hydroxyapatite crystals and replace the hydroxyl ions
Ill. Fluoride ions react chemically with the calcium in the enamel.
IV. When topically applied, the fluoride ion only affects the outer layers of enamel.
V. Fluoride ions react with the apatite crystal to make it more resistant to acid
a. I, Il, and IV
b. II, IV, and V
c. III, IV, and V
d. I, Ill, and IV
e. all of the above
A
b. II, IV, and V
20
Q
- The smear layer is an important consideration in.
a. Bevel placement
b. Establishing the outline form caries
C. Dentin bonding
d. The formation of recurrent
A
C. Dentin bonding
21
Q
- Ways to reduce polymerization shrinkage, except:
a. Soft start curing instead of using high-intensity light cures
b. Incremental additions of composite
c. Placement of liner such as dentin adhesives and flowable composites
d. Increase the ratio of bonded and unbonded surfaces
A
d. Increase the ratio of bonded and unbonded surfaces
22
Q
- The wedge is placed with its apex:
a. Toward the gingiva
b. Toward the mesial surface of prepared tooth
C. Toward the incisal/occlusal
d. Toward the distal surface of prepared tooth
A
C. Toward the incisal/occlusal
23
Q
- Most often used thickness of the matrix band
a. 0.0015 cm
b. 0.0015 inch
c. 0.015 inch
d. 0.0015 mm
A
b. 0.0015 inch
24
Q
- When is the best time to polish composite
a. After I week
b. After 24 hours
c. After a week
d. Immediately after
A
d. Immediately after
25
25. When applying a Tofflemire matrix band to a tooth with a class ll preparation, the edge of the band with the larger circumference is always oriented ____ and the open end of the U-shaped retainer head is always oriented ____
a. occlusally, occlusally
b. occlusally, gingivally
c. gingivally, occlusally
d. gingivally, gingivally
b. occlusally, gingivally
26
26. Bonding of composite restorative materials to dentin depends on
a. difunctional coupling agents
b. etching with dilute phosphoric acid
c. dehydration of the dentin
d. covalent bonding
a. difunctional coupling agents
27
27. The generally accepted maximum thickness of a composite increments that allows for proper cure is.
a. 1 to 2mm
b. 2 to 4 mm restriction
c. 4 to 6mm
d. there is no maximum thickness
a. 1 to 2mm
28
28. Reaction of bonding agent with enamel is both chemical and mechanical.
Mechanical bonding agent locks itself into the tooth structures.
a. 1st statement is correct, 2nd statement is incorrect
b. 1st statement is incorrect, 2nd statement is correct
c. Both statement are correct
d. Both statement are incorrect
a. 1st statement is correct, 2nd statement is incorrect
29
29. When the gingival margin is gingival to the CEJ in a class Il amalgam preparation, the
axial depth of the of the axiogingival line angle should be.
a. 0.2mm into sound dentin
b. Twice the diameter of a No. 245 carbide bur
c. 0.75 to 0.80mm
d. The width of the cutting edge of a gingival marginal trimmer
c. 0.75 to 0.80mm
30
30. For mechanical pulp exposure that is non carious and the exposure is less than 1.0mm.
what is usually the most appropriate treatment?
a. No pulp treatment
b. Direct pulp capping
d. indirect pulp capping
e. endodontic therapy
b. Direct pulp capping
31
31. Which of the following teeth retain sealants the best?
a. Pemanent first molars
b. Primary second molars
c. Permanent second premolars
d. Permanent second molars
e. Primary first molars
c. Permanent second premolars
32
32. The advantages of restoring the proximal lesion from the lingual approach are as
follows, except
a. The facial enamel is conserved for enhanced esthetics.
b. Some unsupported, but not friable, enamel may be left on the facial wall of a Class Ill or Class IV preparation.
c. Color matching of the composite is critical.
d. Discoloration or deterioration of the restoration is less visible.
c. Color matching of the composite is critical.
33
33. All Class I lesions should be filled with composite resin, because they are esthetically important
a. Both the statement and the reason are correct and related
b. Both the statement and the reason are correct but NOT related
c. The statement is correct, but the reason is NOT
d. The statement is NOT correct, but the reason is Correct
e. NEITHER the statement NOR the reason is Correct
e. NEITHER the statement NOR the reason is Correct
34
34. On the first day in your solo private practice you have a pulp exposure. All of the following are favorable factors in avoiding root canal treatment. Which one is the EXCEPTION?
a. It is a mechanical exposure of 1 mm / slight
b. The tooth had never been symptomatic exposure
c. The pulp tissue appears pink
d. The is hemonhage is slight
e. It is pinpoint carious
e. It is pinpoint carious
35
35. Advantages of light cured, EXCEPT:
a. require less finishing time.
b. exhibit greater color stability
c. less internal porosity
d. Effects of polymerization shrinkage can be fully compensated for
d. Effects of polymerization shrinkage can be fully compensated for
36
36. To ensure better thermal and protective insulation of the pulp during a capping procedure, calcium hydroxide should be:
a. applied to a thickness of 3.0m
b. placed in all cavity preparations
c. covered with a stronger base
d. preceded by application of a cavity varnish
e. preceded by application of zinc phosphate cement
c. covered with a stronger base
37
37. Weak or missing proximal contact is cause by:
a. adequately contoured matrix band
b. Inadequate wedging, both operatively and during the composite insertion
c.Matrix band movement during composite insertion, or matrix band not in direct contact with the adjacent proximal surface
d. Tacky composite pulling away from matrix proximal area during insertion
c.Matrix band movement during composite insertion, or matrix band not in direct contact with the adjacent proximal surface
38
38. Type of pits and fissure sealant that bond chemically to tooth structure.
a. Resins
c. GIC
b. compomers
d. all of the choices
a. Resins
39
39. An ion-releasing composite material that reduces secondary caries formation at restoration by inhibiting bacterial growth:
a. Ceromers
b. Ormocers
c. Flowable composites
d. smart composites.
e. compomers
d. smart composites.
40
40. The purpose of the sealant is to provide a physical barrier to occlude pils and fissures and to protect them from bacteria and food, prevent development of dental caries.
Sealants should be placed as soon as possible because of more susceptibility of caries during the eruption period.
a. TRUE
b. FALSE
b. FALSE
41
41. A composite restoration is wider than the diameter of the light tip of the curing unit. In
this situation, the restoration is cured by:
a. Moving the tip over the surface for the required time
b. Placing the tip stepwise over each area and exposing each area for the required time
c. Positioning the tip far enough from the surface illuminate the entire surface
d. Centering the tip on the surface and curing the entire restoration from this position
b. Placing the tip stepwise over each area and exposing each area for the required time
42
42. This is placed at the base, both gingival and occlusal, curing is carried out from all the sides.
a. Incremental Layering Technique
b. Horizontal technique
c. U-shaped Layering Technique
d. oblique technique
e. bulk technique
c. U-shaped Layering Technique
43
43. Ensures complete polymerization of the resin-based composite which allows optimal light transmission within the restoration, thus increasing esthetics.
a. Incremental layering technique
b. Horizontal technique
c. bulk technique
d. oblique technique
a. Incremental layering technique
44
44. Light guide helps in filtering the light to spectrum of visible light (450-500 m)for peak
absorption of camphorquinone
a. Plasma arc curing unit
b. Light emitting diode
c. argon laser curing unit
d. Tungsten-quartz halogen
a. Plasma arc curing unit
45
45. The dentist adjusts the shade of restoration using a complementary color. This procedure will result in:
a. Increased value
b. Decreased value
c. Intensified color
d. Intensified translucency
b. Decreased value
46
46. Laser wavelength of light activated composite resin is
a. 410-500nm
b. 460-500m
c. 450-500m
d. 470nm
b. 460-500m
47
47. What is the lethal dose of fluoride for a 70kg adult.
a. 60-80mg/kg body weight weight
b. 32-64mg/kg body weight weight
c. 50-60mg/kg body
d. 30-70-mg/kg body
b. 32-64mg/kg body weight weight
48
48. Success depends on the age of the patient, size of the exposure, restorative procedure and evidence of pulp vitality.
a. indirect pulp capping
b. direct pulp capping
b. direct pulp capping
49
49. It is the adjustment of the fluoride content of a community's water supply to an optimal
level for the prevention of dental caries.
a. flouride supplement
b. school water fluoridation
c. flouride mouth rinse program
d. none of the above
d. none of the above
50
50. The diagonal slot opening on the Tofflemire matrix retainer (also called the Universal matrix system) is always placed facing the gingiva. This:
a. Permits easy separation of the retainer from the band in an occlusal direction
b. Allows for better contour of band to tooth
c. Allows for easier wedge placement
d. Is less harmful on the gingiva
a. Permits easy separation of the retainer from the band in an occlusal direction
51
51. In direct pulp capping, how many months will you remove the cement in the exposure site. If secondary dentin formation takes place over the exposed site.
a. 3-4 months
b. 2-3 months
c.1-2 months
d. 6 months
b. 2-3 months
52
52. Factors that affect the success of denting bonding include all of the following, except
one.
а. Dentin factors such as sclerosis, tubule morphology, and smear layer.
b. Tooth factors such as attrition, abrasion and abraction
c. Material factors such as compressive and tensile strength
d. C-factors considerations
c. Material factors such as compressive and tensile strength
53
53. Which of the following statements is not true regarding bonding systems?
a. Although dentin bonding occurs slowly, it results in a stronger bond than to enamel
b. Enamel bonding appears quickly, is strong and is long -lasting
c. One bottle dentin bonding systems maybe simpler but are not always better
d. Dentin bonding is still variable because of factors such as sclerosis, tubule size and tubule location
a. Although dentin bonding occurs slowly, it results in a stronger bond than to enamel
54
54. This is a fluid materials that can adapt more readily to all aspects of a tooth preparation because of their rheology.
a. Varnish
b. Liner
c. Base
b. Liner
55
55. The matrix band should be removed after condensation of the amalgam, but prior to the final carving of the restoration. This is because the wedge compensates for the thickness of the matrix band.
a. Both the statement and the reason are correct and related
b. Both the statement and the reason are correct but NOT related
C. The statement is correct, but the reason is NOT
d. The stalement is NOT correct, but the reason is correct
e. NEITHER the statement NOR the reason is correct
b. Both the statement and the reason are correct but NOT related
56
56. This is applied on the walls of a prepared cavity to decrease the microleakage and
prevent tooth discoloration of tooth.
a. varnish
b. liner
c. bonding agent
d. dentin primer
a. varnish
57
57. All of the following constitutes an ideal cure, except:
a. Incremental packing of materials up to 2mm maximal thickness
b. 20-40 seconds curing
c. Darker shades and thicker layers need less curing time
d. Keep distance from tip to material less than 6mm
e. Light must be kept at right angle to the material
c. Darker shades and thicker layers need less curing time
58
58. The principal reasons for placing a gingival interproximal wedge in conjunction with a
matrix for amalgam condensation are to:
1.Separate the teeth slightly
2. Keep the bond tight at gingival margin
3. Contributes to the interproximal contact of restoration
a. 1,2,3
b. 2,3,4
c. 1,3,4
d. all of the choices
a. 1,2,3
59
59. The light cure sealants require UV light. The light cure sealants are known to be clinically better than chemical cure.
a. The first statement is true, the second statement is false
b. The first statement is false, the second statement is true
c. Both statements are true
d. Both statements are false
d. Both statements are false
60
60. This will alleviate pain from mild-to-moderate inflammation of pulp.
a. СаОН
b. Varnish
C. ZOE
d. all of the choices
C. ZOE
Resto Compre
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