![]() Medi-Rehatek will continue to introduce classification of below-knee prosthesis. ⑶ KBM (kondylen-bettung-MOnster) calf prosthesis - It is a wedge-shaped calf prosthesis with patellar ligament bearing load, the anterior part of the prosthetic socket is attached to the lower edge of the patella, both sides have the wing-like prominence, extend to the upper edge of outside and inside femoral condyle. The interior part is provided with a detachable wedge-shaped plate conforming to the shape of the femoral condyle. When the residual limb penetrates into the socket,then the wedge plate is inserted in, and the suspension and fixation functions well. This calf prosthesis only uses different suspension from PTES, its appearance isslightly better than PTES, also applies to amputees with shorter stump. ![]() 3.TSB (total-surface-bearing) full contact calf prostheses The main feature of TSB full contact calf prosthesis is be cast in the special load-bearing frame when the stump bears load. So the prosthetic socket has the characteristics of full surface contact and reasonable load-bearing. Both sides of prosthetic socket of TSB full-contact calf prosthesis appropriately extends upward.It is unnecessary to have patellar ring belt suspended.It can be applied to below knee amputee with different stump length. ![]() 4. PTK (prostheSe-fibiale-Kegel) calf prostheses PTK calf prosthesis is a combination of characteristics of patellar tendon bearing load and full contact calf prosthesis.A specialized pressure block tightly pressesthe femoral condyle when taking plaster cast in socket. PTK socket is similar to KBM, the anterior part extends up to upper edge of patella but there is a slot on the patella. Both sides extend up to the femoral condyle and have some flexibility. There is a wedge-shaped convex protrusion in upper edge of femoral condyle,that has the function of suspension.The socket liners are like PTES, which contains knee completely.This calf prosthesis has the advantage of reasonable load-bearing,strong suspension.It is easy to wear on and off,suitable for below knee amputee with different stump length (including the stump length is too short).
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