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

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

1 Answer

Answer :

B. Contract
by

Related questions

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Class V composite resin restorations can be polished, A. 24 hours after application B. Immediately after application C. 3 to 4 days D. 3 to 4 weeks E. Not at all

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A patient comes to you with medium pain of tooth filled with Composite resin as a result of cold or hot drinks, what will your initial management be, A. Remove the restorative material and start an Endontic treatment B. Remove the restorative material and place a sedative temporary material C. Place a coat of bonding material on the old composite

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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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The clinical advantage of porcelain laminate veneers over composite resin veneers is: A. Color stability and resistance to abrasion B. Availability of self-curing or light activated placement (yes but not necessary a clinical advantage) C. Minimal over-contouring of the treated teeth ( not necessarily true depends on the dentist's abilities) D. May be used in edge to edge occlusion or Class III relationships.

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When considering visible light cured composites, which of the following statements is incorrect? A. An air-inhibited layer is present superficially on the composite. B. The wavelength of the light which affects the initiator is in the range of 450 to 500 nanometers. C. All other things equal. The light generally penetrates deeper into a small-particle composite than it does into a microfilled composite. (smaller particles absorb more light) D. B and C E. All are true

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Etching a hybrid glass ionomer-composite a. is necessary for composite resin bonding b. is not necessary for composite resin bonding c. is necessary for adding a glass ionomer cement for repair d. is not necessary for adding a glass ionomer cement for repair e. a 3-5 second etch with 10% phosphoric acid is recommended

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When incrementally placing a large composite resin restoration, what effect does an air-inhibited layer on the surface of the first increment have on the bond between the first and the second increments? A. It has no effect on the bond B. It is desirable and improves the bond C. It is undesirable and should be removed

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A patient complains of sensitivity, on examination you find a composite filling restoring a good cavity preparation without any secondary caries; what is your next step: A. Extirpate the pulp that is obviously inflamed B. Place ZOE dressing to sedate the pulp C. Ask patient to come back in six months D. Repeat restoration

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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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In a posterior vital molar with a core the best material to restore is: A. Amalgam B. Composite resin C. GIC

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Last Answer : A. To increase surface area

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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Which of the following is the most significant factor regarding filler in composite for increased strength: A. Particle size 1-3 micron B. Sub micron sized particles C. High concentration of the filler particles

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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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Pin Restoration with which material has the best retention: A. Amalgam B. Gold inlay C. Composite D. Glass Ionomer

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

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Which material is not compatible with composite resin: A. Zinc Oxide eugenol (ZOE) B. Ca(OH)2 C. Carboxylate D. Zinc phosphate cement

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Which of the following restoration material’s strength is not effected by pins: A. Amalgam B. Composite resin

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What is the advantage of composite over silicate resin: A. Less shrinkage B. Less surface erosion C. Less water absorption D. 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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Last Answer : Answer: Option D

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Last Answer : Memories.

Etched or burned bands on the contact faces of the brushes in a direct current generator can be caused by ____________. A. high mica segments B. copper drag on the commutator C. brushes improperly positioned D. copper embedded in the brushes

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When setting up teeth for complete dentures having bilateral balanced occlusion, separation of posterior teeth during protrusion is done by: A. Increasing the anterior posterior occlusal curve B. Decreasing the angle orientation of the occlusal plane

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The hamular notch is important in full denture construction because it aids in the setting position of the artificial teeth A. First statement is true, but the reason given is false B. Both statements are true C. Both statements are untrue

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High copper amalgam lasts longer than low copper amalgam because of:** A. Increased compressive strength B. Increased corrosion resistance C. High creep D. Increased tensile strength E. Decreased setting expansion

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The setting expansion of casting investment is approximately A. 0 to 0.1% B. 0.1 to 0.5% C. 0.5 to 1% D. 1.1 to 1.6%

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