Prosthetic Impression Technique

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Why are the nasal passages packed with cotton during the impression-taking process?

To instruct the patient to keep their eyes closed

To prevent the entry of the impression material (correct)

To ensure the impression material reaches all required regions

To provide backing and support for the impression material

What material is applied over the impression material to provide backing and support?

Irreversible hydrocolloid

Dental plaster (correct)

Poly vinyl siloxane

Die stone

What is the primary purpose of inspecting the impression carefully after removal?

To prepare the impression for the pouring of die stone

To ensure the patient's eyes are closed

To determine the size and shape of the prosthesis

To check for any defects or errors in the impression (correct)

How is the size and shape of the prosthesis typically determined?

From all of the above Signup and view all the answers

What is the purpose of applying a thick layer of dental plaster over the impression material?

To provide backing and support for the impression material Signup and view all the answers

What is the next step after removing the impression from the patient?

Inspecting the impression carefully Signup and view all the answers

What can be used as a starting point for modeling a wax pattern?

A cast of a normal nose from another person Signup and view all the answers

How can the prosthesis junction with the skin be hidden?

By reducing the peripheral outline of the prosthesis to fall along a natural groove or crease Signup and view all the answers

Why is it essential to try the wax sculpture on the patient?

To see if it fits properly and looks well on the face Signup and view all the answers

How can the wax pattern be temporarily held on the face?

With small pieces of transparent adhesive tape Signup and view all the answers

What can be made on the wax pattern while it rests on a full facial cast?

Appropriate grooves to receive spectacles Signup and view all the answers

What is a benefit of using a cast of a normal nose from another person?

It gives something definite to start with Signup and view all the answers

What is the primary purpose of a temporary nasal prosthesis?

To provide early rehabilitation for the nasal defect during the healing process Signup and view all the answers

How long is the definitive or permanent nasal prosthesis worn for?

For a long period of time after the healing period Signup and view all the answers

What is the correct position of the patient during the impression procedure?

Semi-supine position Signup and view all the answers

Why is petroleum jelly applied to the patient's eyebrows and eyelashes?

To prevent the flow of material into the undesired areas of the defect Signup and view all the answers

What is the purpose of moist gauze during the impression procedure?

To prevent the flow of material into the undesired areas of the defect Signup and view all the answers

What is the extent of the nasal impression?

From the frontal bone to the upper lip, and from tragus of left ear to tragus of right ear Signup and view all the answers