Prosthetic CPM Certification Exam
2026/2027 | Study Guide & Exam Prep
What are the measurements that should be taken when casting a TT prosthesis? -
correct answer-Circumference every 2", starting 4 inches proximal to MPT
AP @ MPT and Popliteal Fossa
ML@ Femoral Condyles
Proximal ML above Femoral Condyles
Limb Length
Tibial Length
MPT to Floor
Shoe Size/Foot Length
What history contents should be taken at the initial evaluation of a patient -
correct answer-Cause of amputation and/date
Comorbidities
Any issues with contralateral limb or upper extremities
Current activities
Job duties
Goals
Home Environment
, Use of Assistive devices
MMT/ROM
Thomas Test
Previous Prosthetic History
Give two advantages and disadvantage to a TSB socket - correct answer-
Advantages: No need for reliefs or accentuated pressure, use of roll on liner for
increased cushion/reduction of shear forces
Disadvantages: May lose rotation control, patient must be able to don and clean
liners (hygenic)
Give two advantages and disadvantage to a PTB socket - correct answer-
Advantage: Use of pelite liner, low maintenance, rotational control
Disadvantage: Patient may not be able to tolerate pressures, may not control
fatty limbs
Give two advantages and disadvantages to suction socket w/valve - correct
answer-Advantages= greater proprioceptive feedback, less pistoning
Disadvantages: requires sleeve which adds bulk, sleeve can get holes which
causes failure in system
Give two advantages and disadvantages to roll on locking liner - correct answer-
Advantages= audible confirmation of suspension, quick suspension (fewer steps),
all benefits of liner, good for low activity patients or those who need assistance
Disadvantages= Pistoning, requires hand dexterity to don, need to be replaced
every 6 months
2026/2027 | Study Guide & Exam Prep
What are the measurements that should be taken when casting a TT prosthesis? -
correct answer-Circumference every 2", starting 4 inches proximal to MPT
AP @ MPT and Popliteal Fossa
ML@ Femoral Condyles
Proximal ML above Femoral Condyles
Limb Length
Tibial Length
MPT to Floor
Shoe Size/Foot Length
What history contents should be taken at the initial evaluation of a patient -
correct answer-Cause of amputation and/date
Comorbidities
Any issues with contralateral limb or upper extremities
Current activities
Job duties
Goals
Home Environment
, Use of Assistive devices
MMT/ROM
Thomas Test
Previous Prosthetic History
Give two advantages and disadvantage to a TSB socket - correct answer-
Advantages: No need for reliefs or accentuated pressure, use of roll on liner for
increased cushion/reduction of shear forces
Disadvantages: May lose rotation control, patient must be able to don and clean
liners (hygenic)
Give two advantages and disadvantage to a PTB socket - correct answer-
Advantage: Use of pelite liner, low maintenance, rotational control
Disadvantage: Patient may not be able to tolerate pressures, may not control
fatty limbs
Give two advantages and disadvantages to suction socket w/valve - correct
answer-Advantages= greater proprioceptive feedback, less pistoning
Disadvantages: requires sleeve which adds bulk, sleeve can get holes which
causes failure in system
Give two advantages and disadvantages to roll on locking liner - correct answer-
Advantages= audible confirmation of suspension, quick suspension (fewer steps),
all benefits of liner, good for low activity patients or those who need assistance
Disadvantages= Pistoning, requires hand dexterity to don, need to be replaced
every 6 months
