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Class II Amalgam Preparation Parts Identification

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Class II Amalgam Preparation Parts Identification

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Questions and Answers

What is the purpose of the Reverse S Curve shape in a Class II amalgam preparation?

Creates a wider form for better amalgam retention

Enhances the esthetic appearance of the restoration

Improves resistance to amalgam fracture (correct)

Facilitates easier access for condensing amalgam

Why is the axial wall of a Class II amalgam preparation typically made convex?

To create a more aesthetically pleasing finish

To make it easier to remove the restoration if needed

To strengthen the preparation and improve amalgam retention (correct)

To allow for better visualization during the restoration process

What is the primary benefit provided by the gingival floor of a Class II amalgam preparation?

Improves adaptation of the restoration to the cavity walls (correct)

Helps prevent microleakage around the restoration

Enhances the emergence profile of the restoration

Allows for better condensation of amalgam material

Why is the buccal wall of a Class II amalgam preparation designed to meet the tooth surface at a 90˚ exit angle?

To maximize resistance form and prevent restoration deformation Signup and view all the answers

What is the significance of creating a retention groove in a Class II amalgam preparation?

Enhances retention of amalgam material within the cavity Signup and view all the answers

What is the purpose of ensuring Gingival Contact is open at least 0.5 mm in Class II Amalgam Preparation?

To prevent caries in the etched area below the contact Signup and view all the answers

What should be the mesiodistal thickness of the marginal ridge in Class II Amalgam Preparation according to the lab manual?

0.6-0.8 mm Signup and view all the answers

What does Step 3 involve in Class II Amalgam Preparation according to the provided text?

Ditching for the box Signup and view all the answers

What motion is recommended while ditching for the box in Class II Amalgam Preparation?

Pendulum motion Signup and view all the answers

How much should the walls converge in Class II Amalgam Preparation according to the lab manual?

3˚-4˚ each Signup and view all the answers