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Impression in Crown and Bridge Prosthodontics

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Impression in Crown and Bridge Prosthodontics

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Questions and Answers

What is the primary purpose of an impression in crown and bridge prosthodontics?

To create a negative likeness of the teeth and surrounding oral tissues

To allow for accurate articulation of the cast and proper contouring of the restoration

To create a bubble-free impression of the prepared tooth

To accurately reproduce the preparation of the tooth and surrounding tissues (correct)

Which property of the impression material is important for capturing undercut regions on the external tooth surface?

Hydrophilicity

Ability to accurately duplicate the tooth preparation

Elasticity (correct)

Bubble-free nature

What is the role of hydrophilicity in an impression material used for crowns and bridges?

It allows the material to be easily removed from the mouth

It enhances the material's ability to capture surface detail (correct)

It helps the material to accurately reproduce the tooth preparation

It ensures the material is bubble-free when set

Why is it important for an impression to be bubble-free?

To prevent distortion of the impression, especially in the finish line area (C) Signup and view all the answers

What is the purpose of reproducing the adjacent teeth and tissues in the impression?

To allow for accurate articulation of the cast and proper contouring of the restoration (B) Signup and view all the answers

What is the primary characteristic of hydrophobic impression materials?

Poor surface wetting (D) Signup and view all the answers

What property is essential for impression materials to ensure safe removal from the mouth?

Adequate tear resistance (A) Signup and view all the answers

Which of the following is NOT a factor that can cause dimensional changes in impression materials?

Exposure to ultraviolet light (C) Signup and view all the answers

What is the critical requirement for impression materials regarding the replication of intraoral structures?

Accurate dimensional stability (A) Signup and view all the answers

Which property of impression materials is essential for accurately capturing fine details?

Accurate reproduction of details (C) Signup and view all the answers