Dahl concept

Question 1

define dahl concept

Answer 1

axial migration of teeth in their natural state to re-establish ICP when you place restorations in high which may take weeks-months-years.

Question 2

what happens if pt says they do not want you to drill their tooth?

Answer 2

need to explain what might happen (Dahl) and obtain concent
= no prep means no space for wing
- wing design should be 0.7 mm
- once cemented pt may still feel wing but since teeth migrate the teeth will naturally come back together

Question 3

how does Dahl work?

Answer 3

• intrusion (40%) of the anterior teeth in contact with the appliance
• extrusion (60%) of the unopposed posterior teeth

Question 4

where is the dahl concept commonly used?

Answer 4

• increase in interocclusal space needed
• increase in occlusal vertical dimension needed (OVD)
• in case of severe anterior TSL

Question 5

what are the advantages of Dahl concept?

Answer 5

• minimal removal of tooth substance
• restore loss of OVD
• restore face height (antiaging)
• cost effective