Comparative biomechanics IC VS QUAD SOCKET -by Sibasis pattanayak

 Comparative Biomechanics

IC vs Quad

Comparative biomechanics – Quad socket

This design does not provide a M-L 

skeletal support to maintain 

equilibrium

• G.Medius fires and moves the femur 

laterally .

• Pelvis moves medially

• The perineal tissue is compressed 

until equilibrium is reached.

• Support interior to ischial tuberosity

may cause anterior rotation of the

pelvis

• Excessive anterior rotation can lead

to lower back pain.

• Anterior rotation must be countered

by the anterior wall

• The anterior wall may force against

the structures of the femoral

triangle (N.A.V.)