Chapter 46

Question 1

What are the characteristics of Polysiloxane Impression Material?

Answer 1

High-dimensional stability, low tear resistance, easy to handle, no taste or odor, available in light-bodied, regular, and heavy-bodied forms.

Question 2

What are the mixing guidelines for Polysiloxane Material?

Answer 2

Best impression material for dimensional stability; model pouring can be delayed up to 7 to 10 days; stiffness makes tray removal difficult; dispensed with an automixer and mixing tips.

Question 3

What is Occlusal (Bite) Registration?

Answer 3

An accurate registration of the normal centric relationship of the maxillary and mandibular arches, also known as bite registration.

Question 4

What is Wax Bite Registration used for?

Answer 4

To show the occlusal relationship of the maxillary and mandibular teeth, particularly useful when diagnostic casts are trimmed.

Most common technique uses a softened baseplate wax.

Question 5

What are the features of Polysiloxane Bite Registration Paste?

Answer 5

Popular for bite registration; supplied as a paste system and cartridges; fast-setting; no resistance to biting forces; no odor or taste; gains dimensional stability over time; convenient to use.

Question 6

When is Zinc Oxide–Eugenol (ZOE) Bite-Registration Paste selected?

Answer 6

When a more durable material is needed for bite registration; offers little or no resistance to bite closure and is fast-setting.

Supplied in a paste system, dispensed onto a paper pad, mixed, and placed on a gauze tray.