AFK Quiz – Resto DM – ConfiDentist

AFK Quiz - Resto DM

1 / 50

1. The debris left on the cavity surfaces after cutting and mainly consist of hydroxyapatite and altered denatured collagen is called

c. smear layer.

d. Weil layer.

b. intermingled layer.

a. hybrid layer.

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2. Orthodontic elastic ligatures should be replaced frequently as a result of

a. significant plastic deformation.

b. decreased elastic limit.

c. accumulated fatigue.

d. stress relaxation.

e. Low resilience.

3 / 50

3. A 55-year-old patient with a history of head and neck radiotherapy 6 months ago, presents for a checkup and consultation. Intraorally and radiographically, there is no evidence of an active carious lesion. The likelihood of a new caries development in this patient is

a. Low

b. Moderate

c. High

d. Very high

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4. Which of the following impression materials has the best elastic recovery and can be removed without significant distortion from the mouth?

b. Polyether

a. Polyvinyl siloxane

c. Polysulfide

d. Alginate

e. Agar-agar

5 / 50

5. Regarding the setting of zinc phosphate, which of the following factors accelerate the setting of the reaction?

a. Higher temperature

b. Longer mixing time

c. More liquid in the mix

d. Slower rate of addition of powder to the liquid

6 / 50

6. Dental porcelain has low

a. hardness.

b. melting point.

c. impact strength.

d. compressive strength.

e. modulus of elasticity.

7 / 50

7. Which of the following cannot be corrected with a porcelain veneer?

a. Discolouration of an unrestored maxillary central incisor.

b. Diastema between 1.1 and 2.1

c. Peg lateral incisor

d. Enamel hypoplasia

e. Tooth 3.2 in crossbite.

8 / 50

8. A 56-year-old patient presents for restoring tooth 3.6 after the root canal treatment done last week. The tooth has an old MOD amalgam restoration with no leakage and adequate pulp chamber space. What is the most appropriate course of action?

a. Restore the tooth and the access hole with bonded amalgam.

b. Restore the tooth with amalgam and prepare the tooth for a crown.

c. Place a titanium post in the distal canal and restore the tooth and prepare it for a crown.

d. Prepare the distal canal and place casting post and core and prepare the tooth for a crown.

9 / 50

9. An open proximal contact on an amalgam restoration is associated to all of the following factors, except

a. inadequate wedging.

b. overtightening the matrix band.

c. inadequate condensing forces.

d. overzealous carving of the restoration.

10 / 50

10. What is the best method for significant adjustment on an E-max crown?

a. Fine grit diamond in a slow-speed handpiece

b. Coarse grit diamond in a slow-speed handpiece

c. Fine grit diamond in a high-speed handpiece

d. Coarse grit diamond in a high-speed handpiece

11 / 50

11. In a Class II amalgam preparation, which one aids in resistance form?

a. Adequate axial wall depth.

b. Occlusal convergence.

c. Proximal dovetails.

d. Reverse curve.

12 / 50

12. In the cross section of a small caries lesion in enamel, which zone/area has the highest porosity?

a. Surface zone

b. Dark zone

c. Body of the lesion

d. Translucent zone

13 / 50

13. Which one is among the characteristic of an inactive carious lesion?

a. Surface of enamel is opaque with loss of luster.

b. Dentin feels leathery on gentle probing.

c. Lesion is usually in a plaque stagnation area.

d. Lesion is located at some distance from the gingival margin.

14 / 50

14. The bonding to which of the following dentins is the least reliable one?

a. Inner dentin.

b. Mantle dentin.

c. Surface dentin.

d. Sclerotic dentin.

15 / 50

15. A 76-year-old diabetic patient presents with a deep subgingival caries in the furcation area of tooth 4.6. What is the material of choice to restore this lesion?

a. Amalgam

b. Flowable Composite

c. Bulk Fill composite

d. Conventional glass ionomer

e. Resin-modified glass ionomer.

16 / 50

16. An 18-year-old patient presents with multiple extensive carious lesions and poor oral hygiene. What is the best initial management for this patient?

a. Immediate filling of all carious lesions with glass ionomer.

b. Removing all carious lesions and placing temporary restorations over next few weeks.

c. Excavating caries and placing amalgam restorations within the next few days.

d. Excavating caries and placing composite resin restorations over the next few months.

17 / 50

17. A recently restored tooth is sensitive on percussion but responds normally to electric pulp testing. The most appropriate management is

a. an occlusal adjustment.

b. changing the restoration.

c. pulpotomy.

d. pulpectomy.

18 / 50

18. In all the following conditions vital bleaching is indicated, except

a. a single dark vital tooth to match the adjacent teeth.

b. several dark natural teeth adjacent to lighter crowns.

c. a 70-year-old patient with dark teeth due to aging.

d. before placing a porcelain veneer.

e. dark teeth due to extrinsic stains.

19 / 50

19. Which of the following agents is recommended for walking bleach technique?

a. Sodium perborate

b. 15% carbamide peroxide

c. 35% hydrogen peroxide liquid

d. 15% hydrogen peroxide liquid

20 / 50

20. In fabrication of a fixed partial prosthesis, using CAD-CAM technology, which material is recommended for a preparation with thin or sharp geometry?

a. E-max

b. Layered zirconia

c. Monolithic zirconia

d. Feldespatic porcelain

21 / 50

21. In fabrication of an E-max crown using CAD-CAM technology, overmilling is not associated with

a. reduction in fracture resistance.

b. open margins of the final restoration due to premature binding.

c. excessive removal of the material on the intaglio surface of the crown.

d. increased risk of stress concentration in the thinnest portion of the restoration.

22 / 50

22. You just received an E-max crown from the lab that was fabricated using CAD-CAM system. Upon try-in you noticed inadequate seating of the restoration and open margins due to premature binding. What is the most likely reason for it?

a. Overmilling

b. Undermilling

c. Excessive digital cement spacer thickness

d. Insufficient digital cement spacer thickness

23 / 50

23. Which of the following options is wrong regarding bonding of adhesive resin cements to intra-radicular dentin?

a. Intra-radicular dentin is less hydrated than the coronal dentin.

b. NaOCl irrigant can negatively affect the bond strength to the dentin.

c. Remaining sealer in the canal can interfere with the bonding process.

d. The intra-radicular smear layer is thicker than the coronal smear layer following cavity preparation.

24 / 50

24. The placement of pins in endodontically treated teeth is

a. Recommended to improve the retention of the final crown.

b. Recommended as it decrease the necessity for intracanal post placement.

c. Not advised due to the increased risk of stress cracks during placement.

d. Not advised due to the increased risk of recurrent caries.

25 / 50

25. What is the major advantage of a cast gold restoration over an amalgam buildup restoration?

a. Lower risk of recurrent caries

b. Less trauma to the pulp.

c. Better marginal seal and adaptation

d. More ideal contours

26 / 50

26. If an active moderate carious lesion becomes arrested, it will show an increase in

a. explorer stickiness.

b. radiopacity.

c. size.

d. surface hardness.

e. surface roughness.

27 / 50

27. The decision to replace an existing amalgam restoration should be made as soon as the restoration exhibits

a. Creep.

b. Recurrent caries.

c. Corrosion and tarnish.

d. Ditching around occlusal margins.

e. All of the above.

28 / 50

28. Which of the following discolorations mainly remains unchanged in response to external bleaching?

a. Brown.

b. Gray.

c. Yellow.

d. White.

29 / 50

29. All the following microorganisms are significantly involved in dentinal caries progression, except

a. Streptococcus Sobrinus.

b. Streptococcus salivarius.

c. Actinomyces viscosus.

d. Lactobacillus casei.

e. E. Lactobacillus acidophilus.

30 / 50

30. Which one is not among the benefits of acid etching prior to placement of a composite?

a. Increasing surface energy

b. Conserving tooth structure

c. Improving esthetics

d. Less microleakage

e. Providing micromechanical retention

31 / 50

31. In contrast to permanent teeth, deciduous teeth

a. have more rounded buccal and lingual surfaces.

b. have less cervical constriction.

c. enamel rods at cervix slope occlusally.

d. enamel mineral content is less organic.

e. dentinoenamel junction is scalloped.

32 / 50

34. A dentist has planned in-office-bleaching and porcelain laminate veneers for a patient’s maxillary anterior teeth. What would be the best sequence of treatment?

a. Bleaching, 2-week delay, tooth preparation, bonding procedures

b. Bleaching and tooth preparation, 2–5-day delay, bonding procedures

c. Tooth preparation, 2-week delay, bleaching, and bonding procedures

d. Tooth preparation, 2-week delay, bonding, and then bleaching procedures

33 / 50

32. You plan to prepare tooth 1.6 for a full ceramic onlay and take a digital impression. Beveled enamel edges should be avoided as

a. there is no smooth transition between the walls and the margins.

b. it is not possible to determine the margins on a virtual model.

c. the margin appears irregular in the scanned model.

d. the scanner can only read should finish lines.

34 / 50

33. Which of the following types of amalgam needs the least amount of mercury for its setting?

a. Spherical

b. Lathe cut

c. Admixed

d. Low copper

e. High copper

35 / 50

35. A 23-year-old patient presents for a check-up and cleaning with a chief complaint of occasional sensitivity from the lower right side. Visual examination of tooth 4.5 shows a distinct occlusal cavity with visible dentin. What is the ICDAS code for this lesion?

a. 2

b. 3

c. 4

d. 5

e. 6

36 / 50

36. In restoration of a deep cavity with amalgam, which one provides thermal insulation to the pulp?

a. Cavity liner

b. Cavity varnish

c. Cavity base

d. Cavity sealer

37 / 50

37. A silicon impression material with high contact angle

a. is hydrophobic.

b. has low osmotic properties.

c. shows high water absorption.

d. can readily be wetted by liquids.

38 / 50

38. The mesial and distal walls of a Class I amalgam preparation diverge toward the occlusal surface in order to

a. resist the force of mastication

b. provide resistance and retention form

c. prevent undermining of the marginal ridges

d. extend the preparation into areas more readily cleansed.

39 / 50

39. Increasing the volume fraction of filler particles in the composite resin results in

a. increased water absorption by composite.

b. decreased composite stiffness.

c. increased composite wear resistance.

d. Improved composite polishability.

40 / 50

40. The coefficient of thermal expansion of which of the following restoration materials is closer to Dentin?

a. Pure titanium

b. Pure gold

c. Amalgam

d. Composite

e. Aluminous porcelain

41 / 50

41. A 79-year-old female patient with a history of rheumatoid arthritis presents for a check-up. You notice a light brown lesion on the buccal surface of the exposed root of tooth 4.3. There is 0.5 mm cavitation, and the lesion appears rough and matted. What is the most appropriate management?

a. Advise brushing 2/day with >1450 ppm F.

b. Apply fluoride varnish 2 times/year

c. Consider resin infiltration

d. Restore

42 / 50

42. A 38-year-old healthy patient presents for cementation of a full-coverage lithium disilicate (IPS e.max) crown on tooth 2.4. The internal surface of the crown was etched with hydrofluoric acid by the laboratory. Which is the most appropriate cementation protocol?

a. Sandblast + RMGI

b. Silane + resin cement

c. Silane + glass ionomer

d. Sandblast + zinc phosphate

e. Self-adhesive resin cement

43 / 50

43. A composite resin material with a lower viscosity has a

a. higher polymerization shrinkage.

b. higher modulus of elasticity.

c. lower water sorption.

d. higher hardness.

44 / 50

44. Which one is not true regarding in-office vital bleaching?

a. Rubber dam should be used during the whole procedure.

b. Appointments for subsequent treatment are scheduled 1 week apart.

c. Use a light-activated solution of 35% hydrogen peroxide in 4-to-10-minute cycles is recommended.

d. If any tooth discomfort is experienced during the process, local anesthesia is indicated.

45 / 50

45. A 71-year-old patient with a history of parkinson disease and diabetes presents for a check-up. Your clinical evaluation shows xerostomia, and several cervical cavities. Which of the following materials is the preferred restorative material?

a. Amalgam

b. Glass ionomer

c. Resin infiltration

d. Silver Diamine Fluoride

46 / 50

46. For a posterior tooth with a proximal margin that extends apical to the cementoenamel junction and for which a direct tooth-coloured restoration is planned, the recommended restoration solution is

a. Resin-modified glass ionomer restoration

b. Conventional composite resin restoration

c. Open-sandwich technique

d. Closed-sandwich technique

47 / 50

47. For a 15-year-year old boy with high caries risk, if proximal surfaces cannot be examined visually or with a probe, posterior bitewings should be taken every

a. 6-12 months.

b. 6-18 months.

c. 12-24 months.

d. 18-36 months.

e. 24-36 months.

48 / 50

48. A 52-year-old patient presents with a heavily restored mandibular first molar requiring cuspal coverage. The tooth has adequate axial wall height and is planned for an adhesively bonded monolithic zirconia onlay. To ensure adequate material strength while preserving tooth structure, what is the minimum occlusal reduction required on the functional cusps?

A. 0.5 mm

B. 1.0 mm

C. 1.5 mm

D. 2.0 mm

E. 2.5 mm

49 / 50

49. A 56-year-old patient requires a resin-bonded indirect restoration cemented with a dual-cure resin cement. The clinician selects a simplified adhesive system that is applied in a single step and air-thinned before light curing. At a 1-year recall, marginal discoloration is noted, particularly in areas with limited light penetration. Which of the following is the most likely explanation for this clinical finding?

a. Excessive smear layer removal leading to collapse of the collagen network

b. Chemical incompatibility between acidic adhesive monomers and the chemical initiator of the resin cement

c. Inadequate micromechanical retention due to absence of enamel prisms

d. Increased polymerization shrinkage of the resin cement

e. Oxygen inhibition of the adhesive layer at the margin

50 / 50

50. A 29-year-old healthy patient presents requesting an esthetic improvement of tooth 1.1 due to mild discoloration. You plan a feldspathic porcelain veneer. The tooth is vital, with minimal existing restorations. Which finish line design is most appropriate for this case?

a. Knife-edge finish line

b. Light chamfer finish line

c. Heavy chamfer finish line

d. Radial shoulder finish line

e. Modified shoulder finish line

Your score is

The average score is 31%

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