Bench Alignment TT & TF

Question 1

TT: sagittal plane

Answer 1

Socket flexed 5 deg

Weight line (passes through mid sagittal bisector) passes through division of posterior and middle thirds of foot (per mfgr)

PTB: 10 deg flexed and weight line 37mm anterior to foot bolt

Question 2

TT: coronal plane

Answer 2

Adduction 5-7 deg (match anatomical)

Foot inset 0-12 mm

Question 3

TF sagittal

Answer 3

TKA line anterior to knee axis (per knee specs)

Socket flexed 5 deg more than the max extension (eg. if flexion contracture is 10 deg, socket should be aligned in 15 deg of flexion)

Question 4

TF: coronal plane

Answer 4

Max adduction

Foot/knee under IT (or between IT and weight line passing through mid coronal bisector