Question 128 (part 2) · LDEK · Restorations — technique and errors
Choose true statements regarding esthetic restoration of anterior teeth:
- A. choice of restoration colour begins with determining the colour of dentin in medial 1/3rd of dried tooth crown, where enamel is thin enough, to not influence the colour estimation.
- B. application of darker colour in cervical region and lighter in proximal region causes the tooth to be wider and shorter, whereas reverse application causes the tooth to be narrower and longer.
- C. tooth crown seems wider, among other, when labial curve is increased in mesio-distal plane, lateral edges are moved more medially, proximal contact is located more lingually, size of incisal triangles is decreased.
- D. crown seems longer, among other, when labial curve is decreased in mesio-distal plane, lateral edges are moved more laterally, proximal contact is located more labially, size of incisal triangles is decreased.
- E. enamel colour is chosen as first and estimated in gingival part of the crown, and shade of enamel mass in 1/3rd cervical crown.
Hint
Remember how light versus dark shades change perceived size, and where on the crown dentin and incisal shades are best assessed.
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