Restorative Dentistry Flashcards

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

Answer: 1.5 mm

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

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

Answer: Sectional matrix with separation ring

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

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

Answer: Moisture control and cross-infection prevention

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

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

Answer: Incremental layering technique

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

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

Answer: VITA Classical

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

What does the term 'ferrule effect' refer to in crown preparation?

Answer: A band of tooth structure encircled by the crown margin

The ferrule effect refers to a 360-degree band of sound dentine encircled by the crown, providing resistance to fracture and improving crown retention.