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Exam (elaborations)

General Prosthetic Questions for ABC Written Exam Latest Study Guide.

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General Prosthetic Questions for ABC Written Exam Latest Study Guide.

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General Prosthetic Questions for ABC Written a! a! a! a! a! a!




Exam Latest Study Guide. a! a! a!




Bench Alignment for TT - a! a! a! a! a!




✅ - 5*to 10* flexion
a! a! a! a! a!




-2* to 5* adduction
a! a! a!




-1/2" to 1" inset a! a! a!




-3* to 5* outward rotation or parallel to the LOP
a! a! a! a! a! a! a! a! a!




-37mm posterior (18-65mm range) a! a! a!




-1/4" anterior from ankle bolt to midline
a! a! a! a! a! a!




Bench Alignment for TF - a! a! a! a! a!




✅ - 5* flexion + flexion contracture
a! a! a! a! a! a! a!




- Long's line + 2* to 5 *
a! a! a! a! a! a! a! a!




-outset foot 1" from ishium + 1*-2* ext a! a! a! a! a! a! a!




-5* external rotation of the knee
a! a! a! a! a!




Cuff strap placement -
a! a! a! a!




✅ -1cm posterior and 1cm proximal to midline at PTB level
a! a! a! a! a! a! a! a! a! a! a!




Silesian Belt placement - a! a! a! a!




✅ -1/4" posterior and proximal to G.T. (Lateral)
a! a! a! a! a! a! a! a!




-1/4" proximal and medial to bisection (Anterior)
a! a! a! a! a! a!




Scrapa's Triangle - a! a! a!




✅ -Ingiunal Ligament
a! a! a!




-Sartorious

-ADDUCTOR Longus a!




Cycle the Elbow in TH prosthesis -
a! a! a! a! a! a! a!

, ✅ -3/4" excursion
a! a! a!




- 2lbs force
a! a!




Operation of TD and Elbow lift (Excursion) - a! a! a! a! a! a! a! a!




✅ -2 1/2" to lift elbow
a! a! a! a! a! a!




-2" for TDa! a!




Starting point for EFA - a! a! a! a! a!




✅ - 1" distal and 1" anterior to elbow center
a! a! a! a! a! a! a! a! a! a!




Hip Bench Alignment -
a! a! a! a!




✅ -joint anterior to knee center 25-50mm
a! a! a! a! a! a! a!




-reference line knee center to 37mm posterior to heel a! a! a! a! a! a! a! a!




-1/2" anterior and 1" proximal to GT
a! a! a! a! a! a!




Subischial Triangle - a! a! a!




✅ -Inferior Pubic Ramus
a! a! a! a!




-Gracilis a!




-Semitendenosis



Adduction of the lateral wall of the socket - a! a! a! a! a! a! a! a! a!




✅ Re-establishes the normal angulation (6-7*) of the femoral shaft, thereby placing the hip abductor
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




muscles under their normal operation tension a! a! a! a! a!




Proper contouring of the lateral wall - a! a! a! a! a! a! a!




✅ -Allows for even distribution of force over the lateral aspect of the residual limb, specifically
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




between the greater trochanter and the lateral distal aspect of the femur
a! a! a! a! a! a! a! a! a! a! a!




-Relief for the lateral distal end of the femur and for GT
a! a! a! a! a! a! a! a! a! a! a!




High medial wall - a! a! a! a!




✅ -Proximal medial wall must be high enough to apply counter pressure to maintain good contact
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




between the femur and the lateral wall a! a! a! a! a! a!

, Proper mediolateral dimension of the socket at ischial level -
a! a! a! a! a! a! a! a! a! a!




✅ -too large an ML will reduce the effectiveness of the lateral and medial walls to stabilize the femur
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




-Divide the circ of the thigh by pi and subtract 1/4"
a! a! a! a! a! a! a! a! a! a!




Proper anteroposterior dimension of the socket -
a! a! a! a! a! a! a!




✅ -too large an AP will tend to permit the IT to be displaced forward, off of the ischial seat.
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




-correct AP determined by subtracting 1/2" from the anatomically determined distance between the
a! a! a! a! a! a! a! a! a! a! a! a! a!




ADDUCTOR longus tendon and the IT a! a! a! a! a!




Pressure on Scarpa's Triangle provides - a! a! a! a! a! a!




✅ -relieves pressure at initial contact
a! a! a! a! a! a!




-comfort for sitting a! a!




-relieves the ADDUCTOR longus tendon a! a! a! a!




-controls rotation a!




-keeps pelvis from rotating
a! a! a!




-IT on the seat
a! a! a!




Anterior-posterior forces - a! a! a!




✅ -concentrated in the anterior distal tibia and posterior proximal soft tissue
a! a! a! a! a! a! a! a! a! a! a! a!




-Socket provides even pressure distribution in the popliteal area and anterior distal relief to prevent
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




excessive pressure a!




Media-lateral forces - a! a! a!




✅ -forces at the proximal medial and distal lateral area force a varum moment at midstance
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




-Socket must have relief for the distal lateral fibula and lateral stabilizing pressure over the shaft of the
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




fibula and anterior compartment.
a! a! a!




Sheer force - a! a! a!




✅ -Occurs when the socket moves in a direction opposite to the residual limb's motion.
a! a! a! a! a! a! a! a! a! a! a! a! a! a! a!




Torque - a! a!

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