Basic principles of wax-up of crowns and bridges

Question 1

Two techniques for wax up

Answer 1

Wax dipping technique

Adapta technique

Question 2

wax up proximal surface important points

Answer 2

• Must be minimal-promotes better plaque control
• Not too small that its unstable
• Most posterior contact-crown occlusal third

Question 3

Wax up of axial surface

Answer 3

• Buccal and lingual surface follow contours of adjacent teeth
• Height of contour at gingival 2/3rds on mandibular molars and middle third of lingual

Question 4

Wax up of occlusal surface important points

Answer 4

• Cusps and ridges evenly shaped

- Point contacts preferred

Question 5

Modelling waxes

Answer 5

Inlay casting wax
Type I wax- medium hardness
Type II- softer
Cervical wax