Complex Amalgam Restoration

Which of the following is not an Indication of complex amalgam restoration

• To replace missing tooth structure due to fracture

• When 1 or more cusps are needed for capping

• When increased resistance and retention form is needed

• When the cavity depth is jus 0.2 -0.8mm into dentin

Which of the following is not a non pin mechanical feature ?

• Box form

• Reduction of undermined cusps

• Coves

• Amalgam bonding

Identify the prepared area?

• slot

• vertical groove

• cove

• none of the above

For placement of pins ,the depth of the caries varies from

• 1.3 to 2mm

• 2 to 3mm

• 0.5 to 2mm

• 3 to 3.5 mm

Which of the following affect the retention of the pin in amalgam

• Size of pin

• Number and depth of elevations

• Material of pin

• Height of the pin

Pinhole should not be positioned very close to the vertical wall as

• Can cause dentin chipping

• It will not give sufficient retention

• Condensation of amalgam will be difficult

• Enough resistance will not be there for the cavity

From the image identify the most preferred , cautious and high risk areas to place the pins based on the arrow marks

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The Pin-retained amalgam restoration using self-threading pins originally was described by

• Markley

• Going

• Birtcil

• Venton

Who introduced amalgapins

• shavell

• Outhwaite

• Pashley

• Markley

The gingival pins of a maxillary cuspid is at an angle of

• 10-15 degrees

• 20-35 degrees

• 30-35 degrees

• 5-10 degrees