MD AD Flashcards
What coupled misalignment has a raised femur head?
AS and IN
What coupled misalignment has a lowered femur head?
PI and EX
What coupled misalignments (Direction of Correction) lowers the femur head?
AS and IN
What coupled misalignments (Direction of Correction) raises the femur head?
PI and EX
On which side do you calculate for AD?
on the MD side
What do you do if the listing is on the side opposite the MD?
convert the listing to its mirror image so you can do math on MD side
Which subscript totals are added?
– AS + IN
– PI + EX
Which subscript totals are subtracted?
– PI - IN
– AS - EX
Multiply the subscript total by 0.4 to determine the…
distortion factor (DF)
What are the 4 steps to calculate for MD-AD?
– Calculate AD on the MD side
– Add or Subtract subcripts
– Multiply the subscript total by 0.4
– Use correct formula (AS/IN (+) or PI/EX (-) )
Every 5 mm of AS will raise the femur head __ mm.
2 mm
Every 5 mm of PI will lower the femur head __ mm.
2 mm
Every 5 mm of EX will lower the femur head __ mm.
2 mm
Every 5 mm of IN will raise the femur head __ mm.
2 mm
If the (DF) is SMALLER than the (MD), the difference will be a ___ (AD).
–Is (AD) on same or opposite side of (MD)?
+ AD = same side of MD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
Calculate the AD
