ORE Part 2 Restorative Dentistry

Question 1

According to UK standards, what is the recommended minimum cavity preparation depth for a Class I amalgam restoration?

Accepted Answer

1.5 mm

Answer

A minimum depth of 1.5 mm is required for amalgam restorations to ensure adequate strength and prevent fracture under occlusal loading.

Question 2

Which matrix system is most appropriate for a Class II composite restoration involving a tight contact area?

Accepted Answer

Sectional matrix with separation ring

Answer

A sectional matrix system with a separation ring (e.g., Palodent) creates a tight, properly contoured proximal contact for Class II composites.

Question 3

What is the primary advantage of rubber dam use during restorative procedures in the UK?

Accepted Answer

Moisture control and cross-infection prevention

Answer

Rubber dam provides moisture control essential for bonding procedures and acts as a barrier preventing cross-contamination and aspiration of materials.

Question 4

When placing a posterior composite, which technique best reduces polymerisation shrinkage stress?

Accepted Answer

Incremental layering technique

Answer

Incremental layering limits the C-factor and reduces total shrinkage stress by curing smaller volumes at a time, improving marginal adaptation.

Question 5

In the UK, which shade guide is most commonly used for shade selection in anterior restorations?

Accepted Answer

VITA Classical

Answer

The VITA Classical shade guide (A1–D4) is the most widely used in UK dental practice for matching tooth colour in restorations.

ORE Part 2 Practice Test

ORE Part 2 Practice Test

ORE Part 2 Restorative Dentistry