material and operate to facilitate removal of a mechanical joint assembly 14 therefrom when the mechanical joint assembly is in place within the pockets 22 and 24 the mechanical joint 20 will be retained in position at the side of a body joint to be treated adjustable posterior straps 26 and 28 and anterior straps 30 and 32 are secured to the pockets 22 and 24 the combination of an anterior and posterior strap is positioned on either side of the mechanical joint 20 and these straps cooperate to surround the limb of a user on either side of a joint to be treated such anterior and posterior straps insure that optimum therapeutic effectiveness is obtained from the spring tension provided by the mechanical joint 20 the mechanical joint 20 is formed at ends of the strut members 16 and 18 which are pivoted about a pivot post 34 these pivoted ends of the strut members are bifurcated to provide an enclosure for an adjustable spring mechanism used to tension the mechanical joint 20 thus the first strut member 16 consists of a flat elongate strut section 36 which as it approaches the mechanical joint 20 is split into an upper leg 38 and a lower leg 40 the upper leg extends parallel to and.