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

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
by

1 Answer

Answer :

B. It is desirable and improves the bond
by

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Two central incisors on a radiograph are showing with what looks like eye drop radiolucency. You decided to start endodontic treatment on these teeth but when you tried to open access to the root canal you find clearly closed orifices with what look like secondary dentine. What is your initial management? A. Leave as it and start a permanent restoration. B. Start systemic antibiotic C. Try to ream and file canals

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On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur

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On an X ray you find the Gutta Percha cone extending 1mm beyond the apex without any symptoms, what would you do: A. Remove restoration material until you are able to withdraw the Gutta Percha cone B. Apiectomy C. Leave as is until any complications occur

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The less mercury remaining in condensed amalgam: A. The stronger the restoration which contains fewer matrix alloys and fewer voids B. The weaker the restoration C. The more matrix alloys D. The more voids E. None of the above

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The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

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During mouth preparation for RPD on tooth adjacent to edentulous area. There is dentine exposure: A. Restoration is required B. Proceed with rest seat preparation and fabrication if involved area is not more than 2mm

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Reconstructing the occlusal anatomy is based on: A. Functional factors B. Depth of restoration on a tooth C. Necessity to restore normal anatomy

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Last Answer : A. Functional factors

The retention pin in an amalgam restoration should be placed, A. Parallel to the outer wall B. Parallel to the long axis of tooth

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For an amalgam restoration of a weakened cusp you should, A. reduce cusp by 2mm on a flat base for more resistance B. reduce cusp by 2mm following the outline of the cusp C. reduce 2mm for retention form

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In the construction of partial dentures the surveyor is not used to, A. Contour the wax as part of the fabrication of the working cast B. Locate the guide planes C. Determine the location of indirect retainers D. Identify any undesirable undercuts

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