Step by step construction of a KAFO orthosis (Knee Ankle Foot Orthosis)
The modular Artikon system offers great simplification to the orthopaedic technician for construction of complex orthotic care. Find valuable tips and practicable know-how for optimal manufacturing and construction, by viewing a practical example in our online-tutorial.
Prepare material for the plaster cast impression.
Grease the silicone tube with Vaseline prior to cutting open.
Mark the ankle rotation point with the blue indelible pencil
Find the medial and lateral knee gap
Mark the lateral knee gap
Measure lateral height from ankle to knee gap.
Insulate the patient’s leg with wrapping foil (slightly tighten wrapping foil).
Fully insulated leg.
Fixate greased silicone tube ventrally at the leg by using masking tape.
Let the patient stand on the plaster heel plate and a height adjustment board (safe stand).
Prepare 6-ply plaster bandage according to foot length.
Prepare 6-ply plaster bandage reaching from knee to heel.
Position torsion wedge correctly at the plaster heel plate (approx. 1 – 1,5 cm in front of the anatomical roll over).
Soak the foot plaster bandage in water and place the patient’s foot on it.
During hardening of the plaster, shape the longitudinal arch by massaging it in.
Model the edge of the plaster bandage with your fingers in circular course.
Soak the dorsal calf plaster bandage and massage well into shape.
The heel must fully stand on the heel plate (plumb line falls through front edge of lateral ankle and front edge of heel).
After the plaster bandages have been hardened, carefully lift the patient’s leg and ask the patient to sit down.
Elevate the leg.
Wrap the leg in circular way with plaster cast bandages (beginning from the tip of the foot).
Let the leg lay down now.
For circular wrapping, the width of the plaster cast bandages must always be wrapped overlapping in triple-steps.
Then let the patient stand correctly on the plaster heel plate and make sure he / she is standing straight (correct standing position of the leg, if necessary) with the plaster cast still damp. Let the cast harden completely.
When the plaster cast has hardened, let the patient sit down and elevate the leg.
Remove the silicone tube.
Mark the cutting lines with the blue indelible pencil.
Carefully cut open the plaster cast in the channel.
Press the plaster cast channel to the leg in half height of the patella, in order to better position the 60:40 gauge later.
Remove plaster cast negative from leg.
Fixate the plaster cast negative circular with masking tape.