ORTHOTICS & PROSTHETICS BOARD WRITTEN EXAM STUDY
GUIDE 2026/2027 - COMPLETE ABC/BOC BOARD REVIEW WITH
PRACTICE QUESTIONS, ANSWERS & RATIONALES
250 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
ORTHOTICS & PROSTHETICS BOARD WRITTEN EXAM STUDY GUIDE 2026/2027 - COMPLETE ABC/BOC
BOARD REVIEW WITH PRACTICE QUESTIONS, ANSWERS & RATIONALES. It contains 250 carefully selected
questions that reflect the most current exam content and testing strategies. Each question is accompanied by a
correct answer and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical
reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 250 Questions
Foundations - Application - Orthotics & Prosthetics Board Written Study Guide 2026/2027 Complete
Abc/boc Board Review WITH & Rationales Orthotics & Prosthetics Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Orthotics & Prosthetics 1-42 Amputation, Prosthesis, Transtibial, Likely, Unilateral
Board Written Study Guide
2026/2027 Complete Abc/boc
Board Review WITH &
Rationales Orthotics &
Prosthetics Graduate
Prosthesis 43-84 Amputation, Socket, Stance, Transtibial, Prosthetic
Socket 85-126 Amputation, Prosthesis, Transtibial, Alignment, Prosthetic
Transtibial 127-168 Amputation, Prosthesis, Design, Orthosis, Prosthetic
Prosthetic 169-210 Amputation, Prosthesis, Primary, Orthosis, Stance
Likely 211-250 Amputation, Transtibial, Socket, Prosthesis, Flexion
TOTAL 250 All questions include answers and detailed rationales
,Section A - Orthotics & Prosthetics Board Written Study
Guide 2026/2027 Complete Abc/boc Board Review WITH &
Rationales Orthotics & Prosthetics Graduate
Q1.
A patient with unilateral transtibial amputation presents with a well-fitting patellar
tendon-bearing (PTB) socket and a SACH foot. During stance phase, the prosthetic foot is
observed to be excessively dorsiflexed at initial contact, causing an audible slap. Which
biomechanical modification to the prosthetic foot would most directly address this gait
deviation?
A. Increase heel cushioning durometer B. Decrease the heel wedge angle
C. Increase the ankle plantarflexion D. Align the foot in slight dorsiflexion
resistance
Correct: C - Increase the ankle plantarflexion resistance
Rationale:Excessive dorsiflexion at initial contact causing foot slap indicates insufficient
plantarflexion resistance. Increasing ankle plantarflexion resistance (e.g., via a dynamic
response foot with adjustable heel lever) controls the foot's drop. Heel cushioning affects
shock absorption, not foot slap. Decreasing heel wedge angle would worsen dorsiflexion.
Aligning the foot in dorsiflexion would also worsen the problem.
Q2.
In the context of lower-limb orthotic management for a patient with flaccid quadriceps but
strong hip flexors and intact sensation, which orthotic design would be MOST appropriate
to control knee hyperextension during stance while allowing free knee flexion in swing?
A. Knee-ankle-foot orthosis (KAFO) with a B. Knee-ankle-foot orthosis (KAFO) with a
drop-lock knee joint posterior offset knee joint
C. Knee-ankle-foot orthosis (KAFO) with a D. Ankle-foot orthosis (AFO) with a
stance-control knee joint plantarflexion stop
Correct: C - Knee-ankle-foot orthosis (KAFO) with a stance-control knee joint
Rationale:A stance-control knee joint locks during stance to prevent knee
collapse/hyperextension but unlocks in swing to allow natural knee flexion. A drop-lock would
prevent flexion in swing. A posterior offset joint provides knee stability via hyperextension but
doesn't control flexion adequately. An AFO alone cannot control the knee. Thus, C is the most
appropriate.
Page 3
, Section A - Orthotics & Prosthetics Board Written Study Guide 2026/2027 Complete Abc/boc Board Review WITH & Rationales Orthotics &
Prosthetics Graduate
Q3.
Which of the following material properties is MOST critical for the fabrication of a
thermoplastic AFO that must resist permanent deformation under cyclic loading while
maintaining a low profile?
A. Low creep resistance B. High fatigue strength
C. Low glass transition temperature D. High thermal expansion coefficient
Correct: B - High fatigue strength
Rationale:High fatigue strength ensures the material can withstand repeated loading without
cracking or permanent deformation, essential for a durable AFO. Low creep resistance would
allow deformation over time. Low glass transition temperature may cause softening at body
temperature. High thermal expansion could affect fit. Therefore, B is correct.
Q4.
A patient with a transradial amputation is fitted with a body-powered prosthesis using a
figure-of-nine harness and a voluntary-opening terminal device. The patient reports that
the device opens too easily, causing accidental dropping of objects. Which harness
adjustment would MOST effectively increase pinch force?
A. Tighten the anterior shoulder strap B. Loosen the control cable tension
C. Increase the terminal device's rubber D. Move the cable housing attachment
band tension distally on the humeral cuff
Correct: C - Increase the terminal device's rubber band tension
Rationale:In a voluntary-opening device, pinch force is generated by rubber bands or springs.
Increasing their tension directly increases pinch force. Tightening the shoulder strap may
increase cable excursion but not pinch force. Loosening cable tension would reduce opening.
Moving the housing attachment changes cable travel but not pinch force. Thus, C is correct.
Q5.
Which of the following best describes the primary biomechanical advantage of a dynamic
response foot (e.g., carbon fiber keel) compared to a conventional SACH foot for a patient
with a transtibial amputation?
A. Increased shock absorption during heel B. Improved energy return during push-off
strike
C. Reduced socket interface pressures D. Greater ankle range of motion in all
during stance planes
Correct: B - Improved energy return during push-off
Page 4
GUIDE 2026/2027 - COMPLETE ABC/BOC BOARD REVIEW WITH
PRACTICE QUESTIONS, ANSWERS & RATIONALES
250 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
ORTHOTICS & PROSTHETICS BOARD WRITTEN EXAM STUDY GUIDE 2026/2027 - COMPLETE ABC/BOC
BOARD REVIEW WITH PRACTICE QUESTIONS, ANSWERS & RATIONALES. It contains 250 carefully selected
questions that reflect the most current exam content and testing strategies. Each question is accompanied by a
correct answer and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical
reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 250 Questions
Foundations - Application - Orthotics & Prosthetics Board Written Study Guide 2026/2027 Complete
Abc/boc Board Review WITH & Rationales Orthotics & Prosthetics Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Orthotics & Prosthetics 1-42 Amputation, Prosthesis, Transtibial, Likely, Unilateral
Board Written Study Guide
2026/2027 Complete Abc/boc
Board Review WITH &
Rationales Orthotics &
Prosthetics Graduate
Prosthesis 43-84 Amputation, Socket, Stance, Transtibial, Prosthetic
Socket 85-126 Amputation, Prosthesis, Transtibial, Alignment, Prosthetic
Transtibial 127-168 Amputation, Prosthesis, Design, Orthosis, Prosthetic
Prosthetic 169-210 Amputation, Prosthesis, Primary, Orthosis, Stance
Likely 211-250 Amputation, Transtibial, Socket, Prosthesis, Flexion
TOTAL 250 All questions include answers and detailed rationales
,Section A - Orthotics & Prosthetics Board Written Study
Guide 2026/2027 Complete Abc/boc Board Review WITH &
Rationales Orthotics & Prosthetics Graduate
Q1.
A patient with unilateral transtibial amputation presents with a well-fitting patellar
tendon-bearing (PTB) socket and a SACH foot. During stance phase, the prosthetic foot is
observed to be excessively dorsiflexed at initial contact, causing an audible slap. Which
biomechanical modification to the prosthetic foot would most directly address this gait
deviation?
A. Increase heel cushioning durometer B. Decrease the heel wedge angle
C. Increase the ankle plantarflexion D. Align the foot in slight dorsiflexion
resistance
Correct: C - Increase the ankle plantarflexion resistance
Rationale:Excessive dorsiflexion at initial contact causing foot slap indicates insufficient
plantarflexion resistance. Increasing ankle plantarflexion resistance (e.g., via a dynamic
response foot with adjustable heel lever) controls the foot's drop. Heel cushioning affects
shock absorption, not foot slap. Decreasing heel wedge angle would worsen dorsiflexion.
Aligning the foot in dorsiflexion would also worsen the problem.
Q2.
In the context of lower-limb orthotic management for a patient with flaccid quadriceps but
strong hip flexors and intact sensation, which orthotic design would be MOST appropriate
to control knee hyperextension during stance while allowing free knee flexion in swing?
A. Knee-ankle-foot orthosis (KAFO) with a B. Knee-ankle-foot orthosis (KAFO) with a
drop-lock knee joint posterior offset knee joint
C. Knee-ankle-foot orthosis (KAFO) with a D. Ankle-foot orthosis (AFO) with a
stance-control knee joint plantarflexion stop
Correct: C - Knee-ankle-foot orthosis (KAFO) with a stance-control knee joint
Rationale:A stance-control knee joint locks during stance to prevent knee
collapse/hyperextension but unlocks in swing to allow natural knee flexion. A drop-lock would
prevent flexion in swing. A posterior offset joint provides knee stability via hyperextension but
doesn't control flexion adequately. An AFO alone cannot control the knee. Thus, C is the most
appropriate.
Page 3
, Section A - Orthotics & Prosthetics Board Written Study Guide 2026/2027 Complete Abc/boc Board Review WITH & Rationales Orthotics &
Prosthetics Graduate
Q3.
Which of the following material properties is MOST critical for the fabrication of a
thermoplastic AFO that must resist permanent deformation under cyclic loading while
maintaining a low profile?
A. Low creep resistance B. High fatigue strength
C. Low glass transition temperature D. High thermal expansion coefficient
Correct: B - High fatigue strength
Rationale:High fatigue strength ensures the material can withstand repeated loading without
cracking or permanent deformation, essential for a durable AFO. Low creep resistance would
allow deformation over time. Low glass transition temperature may cause softening at body
temperature. High thermal expansion could affect fit. Therefore, B is correct.
Q4.
A patient with a transradial amputation is fitted with a body-powered prosthesis using a
figure-of-nine harness and a voluntary-opening terminal device. The patient reports that
the device opens too easily, causing accidental dropping of objects. Which harness
adjustment would MOST effectively increase pinch force?
A. Tighten the anterior shoulder strap B. Loosen the control cable tension
C. Increase the terminal device's rubber D. Move the cable housing attachment
band tension distally on the humeral cuff
Correct: C - Increase the terminal device's rubber band tension
Rationale:In a voluntary-opening device, pinch force is generated by rubber bands or springs.
Increasing their tension directly increases pinch force. Tightening the shoulder strap may
increase cable excursion but not pinch force. Loosening cable tension would reduce opening.
Moving the housing attachment changes cable travel but not pinch force. Thus, C is correct.
Q5.
Which of the following best describes the primary biomechanical advantage of a dynamic
response foot (e.g., carbon fiber keel) compared to a conventional SACH foot for a patient
with a transtibial amputation?
A. Increased shock absorption during heel B. Improved energy return during push-off
strike
C. Reduced socket interface pressures D. Greater ankle range of motion in all
during stance planes
Correct: B - Improved energy return during push-off
Page 4
