Restorative Dentistry Flashcards

What is the significance of the 'smile arc' in aesthetic dental assessment?

Answer: The curvature of incisal edges should follow the curve of the lower lip

An aesthetic smile arc means the curvature formed by the upper incisal edges mirrors the inner curve of the lower lip when smiling.

Which radiograph is most useful for assessing the length and curvature of roots before post placement?

Answer: Periapical radiograph

Periapical radiographs give the most accurate view of root length, curvature, and canal anatomy, essential for safe post preparation.

What is the minimum recommended post length in relation to root length?

Answer: Two-thirds of root length

The post should extend at least two-thirds of the root length to distribute stress and prevent root fracture, while retaining 4–5 mm of apical seal.

Which cement is contraindicated for luting glass ceramic crowns?

Answer: Zinc phosphate cement

Zinc phosphate cement lacks adhesive bonding, reducing retention for all-ceramic crowns that rely on adhesive luting for strength and aesthetics.

In tooth preparation for a ceramic veneer, where should the margin ideally be placed?

Answer: Supragingival in enamel

Margins should be placed supragingival and within enamel to facilitate bonding, allow accurate impressions, and maintain periodontal health.

According to the FGDP(UK), what does 'Delivering Better Oral Health' primarily guide?

Answer: Evidence-based preventive advice for dental teams

'Delivering Better Oral Health' is the Public Health England toolkit providing evidence-based guidance on preventive interventions for all dental patients.