Simplicity is accomplished at the expense of function.
Initially in the static situation, demands on the prosthesis are relatively few but these increase and become progressively more critical as the patient ambulates. While an acceptable prosthetic unit with articulation is possible, alignment and ambulation stresses present difficulties in retaining the unit securely to the rigid dressing because of the structural weakness of plaster. Avoid suspending the stump sock in such a manner that the moist proximal portion is pulling away from the lower waist, resulting in a loose cast in this area. At the same time, avoid proximal constriction by cutting of the socket brim into soft tissue. While it is recommended that full use be made of the elastic plaster bandage, avoid overstretching either border of the bandage.