Ortho Lab 4

Question 1

Please construct an URA to expand the upper arch

Answer 1

Active component - Midline palatal screw - demonstrate how to use the key - turn 1/2 times a week, tooth movement = 0.25mm per week

Retentive - 16,26 Adams clasp 0.7mm HSSW
- 14,24 Adams clasp 0.7mm HSSW

Anchorage - No - reciprocal anchorage - both sides will expand due to Newtons 3rd Law

Baseplate - self cured PMMA and posterior bite plane (it disenages the upper and lower molars to allow upper molar teeth to slide along the lower teeth

Question 2

Types of pilers

Answer 2

Wire cutters
65 coil formers
Adams universal (64)