.In which class of cavities do composite restorations show most durability: A. I B. II C. IV D. III E. V

.In which class of cavities do composite restorations show most durability:
A. I
B. II
C. IV
D. III
E. V
by

1 Answer

Answer :

D. III
by

Related questions

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Longest lasting resin restorations are, A. Class I B. Class II C. Class III D. Class IV

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Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability

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When do you finish composite resin restorations: A. Immediately after curing B. After 24 hours C. A week after placement

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In class II restorations, all of the following are considered to occur as probable causes of periodontal problems except: A. Flat ridge B. Faulty or not proper contour C. Not properly polished restoration D. Cervical wall is too deeply apical E. Overextension of lining in cavity

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What is the most common fracture of Class II amalgam restorations: A. Isthmus because of insufficient depth B. Internal fracture C. Marginal ridge site

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Marginal leakage at the proximal gingival cavosurface of a recently restored class II can be caused by: I. Insufficient condensation II. First proximal increment was too large III. Neglecting to wedge the matrix IV. Hand manipulation instead of mechanical V. Debris contamination A. I, II, III B. II, III, IV C. I, II, V D. None of the above E. All of the above

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When preparing a class III cavity for composite restoration; in which situation should acid itching be used: A. Always should be performed to minimise marginal leakage B. Should not be performed because it might damage the adjacent tooth C. When extra retention is required D. Only in situations where cavity is shallow to avoid pulp irritation

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Etching techniques are used always to: A. minimise the leakage of restorations B. for aesthetic considerations

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What is true about Angioneurotic oedema, A. Puffiness around the eyes, oedema of the upper lip with redness and dryness B. Caused by several deep restorations in the anterior teeth C. There is no caries, negative thermal tests, negative percussion and negative response to palpation

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Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of a concave mirror (iii) in front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics

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Which one of this restorative methods will be LEAST compromised by a core, A. Amalgam B. Composite C. GIC D. Cast gold

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On examination of a composite restoration you find a dark attain: A. Replace the composite B. Repair with unfilled resin C. Apply topical fluoride at the margin

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When is a gingival groove LEAST required: A. When restoring with GIC for abrasion B. When restoring with GIC for root caries C. When restoring with GIC base and composite lamination D. When restoring with amalgam

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What happens to etched composite resins after setting: A. Expand B. Contract C. Contract and expand

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Sensitivity to hot and cold foods soon after cavity preparation and placement of GIC and composite resin in an upper incisor tooth is due to: A. Mechanical trauma due to cavity preparation B. Chemical C. Heat from GIC settings

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What is an important requisite for fillers in dental composite restorative resins in load bearing areas: A. Sub micro sized particles B. High coefficient of thermal expansion C. High in content (High filler)

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A patient has a small incisal fracture of the maxillary incisor. Which is the best material to resist fracture at the acid etched tooth composite interface: A. Micro-filled composite B. Hybrid composite C. GIC D. Silicate

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A seven years-old boy fell off his bicycle 2 weeks ago and broke his maxillary central incisor. The pulp horn is visible as a pin point. The tooth is vital. Your treatment will be: A. Pulpectomy B. Place calcium hydroxide and fill with composite resin C. Calcium hydroxide pulpotomy

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