ORE Part 2 Prosthetics & Dentures 2

Question 1

What impression technique is used to record a flabby anterior ridge for a complete denture?

Accepted Answer

Selective pressure technique using window impression

Answer

A window (closed window) or selective pressure technique uses a special tray with a relief window over the flabby tissue, allowing mucocompression of stable areas while minimising displacement of flabby tissue.

Question 2

What is the significance of the Camper's plane in complete denture construction?

Accepted Answer

Used to set the occlusal plane parallel to the ala-tragus line

Answer

Camper's plane (ala-tragus line) is used as a reference to orient the occlusal plane of complete dentures parallel to the floor, contributing to aesthetics and balanced occlusion.

Question 3

Which denture base material has the highest thermal conductivity, beneficial to palateless dentures?

Accepted Answer

Cobalt-chromium metal alloy

Answer

Cobalt-chromium alloys have significantly higher thermal conductivity than acrylic, allowing patients to sense temperature from food and drinks — an advantage for palateless or reduced coverage dentures.

Question 4

What is a Kennedy Class I partial denture classification?

Accepted Answer

Bilateral free-end saddle (missing posterior teeth on both sides)

Answer

Kennedy Class I is defined as a bilateral edentulous area posterior to the remaining natural teeth (bilateral free-end saddles), the most challenging classification for removable partial dentures.

Question 5

What is the role of a rest seat in a cobalt-chromium partial denture?

Accepted Answer

Transmit occlusal forces to the tooth and prevent denture sinking

Answer

Rest seats receive the occlusal rests of the RPD framework, directing occlusal forces along the long axis of the tooth and preventing the denture from sinking into the soft tissues.

ORE Part 2 Practice Test

ORE Part 2 Practice Test

ORE Part 2 Prosthetics & Dentures 2