Question 19 (part 2) · LDEK · Veneers and inlays
Properly prepared tooth 36 for ceramic overlay requires:
1) cutting the buccal cusp by around 1.5 to 2mm;
2) cutting the lingual cusp by 1mm;
3) finishing the cusps falling within preparation with radial shoulder of 1.5mm width;
4) divergent preparation of the axis walls at an 18o angle;
5) preparation of cavities located on proximal surfaces in the cuboid shape;
6) minimum width of the cavity of occlusal surface should be 2/3rd of the intercuspal width.
Correct answer is:
2) cutting the lingual cusp by 1mm;
3) finishing the cusps falling within preparation with radial shoulder of 1.5mm width;
4) divergent preparation of the axis walls at an 18o angle;
5) preparation of cavities located on proximal surfaces in the cuboid shape;
6) minimum width of the cavity of occlusal surface should be 2/3rd of the intercuspal width.
Correct answer is:
- A. 1,2,5.
- B. only 1.
- C. 1,3,6.
- D. only 2.
- E. all of the above mentioned.
Hint
For a ceramic onlay, consider the minimum ceramic thickness over both cusps and the rounded internal form a brittle material requires.
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