ABC PROSTHETIC CERTIFICATION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Sheer force.
Answer: -Occurs when the socket moves in a direction opposite to the
residual limb's motion.
◍ Longitudinal Limb Deficiencies.
Answer: -absence of skeletal anatomy within the long axis of the limb,
sometimes includes normal anatomy distal to the affected area
◍ Adduction of the lateral wall of the socket.
Answer: Re-establishes the normal angulation (6-7*) of the femoral shaft,
thereby placing the hip abductor muscles under their normal operation
tension
◍ Heel durometers act as?.
Answer: Dorsiflexors
◍ Hip Bench Alignment.
Answer: -joint anterior to knee center 25-50mm-reference line knee center
to 37mm posterior to heel-1/2" anterior and 1" proximal to GT
◍ Proper contouring of the lateral wall.
Answer: -Allows for even distribution of force over the lateral aspect of the
residual limb, specifically between the greater trochanter and the lateral
distal aspect of the femur-Relief for the lateral distal end of the femur and
for GT
◍ Hemimelia.
Answer: Longitudinal deficiencies in which part or all of one long bone is
, missing.
◍ ML Stability -- Adduction of the lateral wall.
Answer: -re-establishes the normal femur angle-puts abductors on stretch
giving them a better mechanical advantage
◍ Bulla.
Answer: A large fluid filled blister.
◍ Sciatic Nerve -- L4,5 S1,2,3.
Answer: -knee flexion, hip addiction, hip extension-hamstrings-adductor
magnus
◍ Obturator Nerve -- L2,3,4.
Answer: -hip abduction, extension and rotation-obturator externus-adductors
(Magnus, longus, brevis)-gracilis
◍ Acheiria.
Answer: Complete absence of the hand
◍ Proximal Base Plate Retainer.
Answer: -more posterior and distal = less required excursion-more proximal
and lateral = less required force-must be 25mm proximal to the cut end of
the humerus
◍ Tibial Nerve -- L4,5 S1,2,3.
Answer: -planter flexion, inversion, some knee
flexion-gastric-soles-popliteus-planters-flexor halluces longus-tibialis
posterior-flexor digitorum longus
◍ Scrapa's Triangle.
Answer: -Ingiunal Ligament-Sartorious-ADDUCTOR Longus
◍ Adactylia.
Answer: Absence of digits
◍ Force Problem -- when flexing the elbow joint, the TD begins to open.
Answer: -add tension bands-move EFA distal-move BPR lateral and
proximal-add spring lift assist-add second BPR-lighter TD-shorten
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Sheer force.
Answer: -Occurs when the socket moves in a direction opposite to the
residual limb's motion.
◍ Longitudinal Limb Deficiencies.
Answer: -absence of skeletal anatomy within the long axis of the limb,
sometimes includes normal anatomy distal to the affected area
◍ Adduction of the lateral wall of the socket.
Answer: Re-establishes the normal angulation (6-7*) of the femoral shaft,
thereby placing the hip abductor muscles under their normal operation
tension
◍ Heel durometers act as?.
Answer: Dorsiflexors
◍ Hip Bench Alignment.
Answer: -joint anterior to knee center 25-50mm-reference line knee center
to 37mm posterior to heel-1/2" anterior and 1" proximal to GT
◍ Proper contouring of the lateral wall.
Answer: -Allows for even distribution of force over the lateral aspect of the
residual limb, specifically between the greater trochanter and the lateral
distal aspect of the femur-Relief for the lateral distal end of the femur and
for GT
◍ Hemimelia.
Answer: Longitudinal deficiencies in which part or all of one long bone is
, missing.
◍ ML Stability -- Adduction of the lateral wall.
Answer: -re-establishes the normal femur angle-puts abductors on stretch
giving them a better mechanical advantage
◍ Bulla.
Answer: A large fluid filled blister.
◍ Sciatic Nerve -- L4,5 S1,2,3.
Answer: -knee flexion, hip addiction, hip extension-hamstrings-adductor
magnus
◍ Obturator Nerve -- L2,3,4.
Answer: -hip abduction, extension and rotation-obturator externus-adductors
(Magnus, longus, brevis)-gracilis
◍ Acheiria.
Answer: Complete absence of the hand
◍ Proximal Base Plate Retainer.
Answer: -more posterior and distal = less required excursion-more proximal
and lateral = less required force-must be 25mm proximal to the cut end of
the humerus
◍ Tibial Nerve -- L4,5 S1,2,3.
Answer: -planter flexion, inversion, some knee
flexion-gastric-soles-popliteus-planters-flexor halluces longus-tibialis
posterior-flexor digitorum longus
◍ Scrapa's Triangle.
Answer: -Ingiunal Ligament-Sartorious-ADDUCTOR Longus
◍ Adactylia.
Answer: Absence of digits
◍ Force Problem -- when flexing the elbow joint, the TD begins to open.
Answer: -add tension bands-move EFA distal-move BPR lateral and
proximal-add spring lift assist-add second BPR-lighter TD-shorten
