Surgically implantable joint spacer

The method of implanting a surgically implantable spacer, the method comprising steps of:

• obtaining a surgically implantable spacer;
• expanding a span or distance between a proximal end of the surgically implantable spacer and a distal end of the surgically implantable spacer, minimizing a distance between a lower contacting surface of the surgically implantable spacer and an upper contacting surface of the surgically implantable spacer;
• inserting the surgically implantable spacer into a biological joint;
• contracting a distance between the proximal end of the surgically implantable spacer and the distal end of the surgically implantable spacer, increasing the distance between the lower contacting surface of the surgically implantable spacer and the upper contacting surface of the surgically implantable spacer,
• wherein the lower contacting surface of the surgically implantable spacer and the upper contacting surface of the surgically implantable spacer move outward from one another in a parallel motion until a resistance force at a first end of the lower contacting surface of the surgically implantable spacer and a same first end of the upper contacting surface of the surgically implantable spacer is greater than a resistance force at a second, opposite end of the lower contacting surface of the surgically implantable spacer and a same second, opposite end of the upper contacting surface of the surgically implantable spacer such that a distance between the first ends of the lower contacting surface and the upper contacting surface and a distance between the second, opposite ends of the lower contacting surface and the upper contacting surface can vary respective to one another,
• wherein, upon the increase of the resistance force at the first end, the first end of the lower contacting surface of the surgically implantable spacer and the same first end of the upper contacting surface of the surgically implantable spacer expand at a reduced rate while a second, opposite end of the lower contacting surface of the surgically implantable spacer and a same second, opposite end of the upper contacting surface of the surgically implantable spacer continue to separate from one another at an original rate until a resistance force applied at the second, opposite end of the lower contacting surface of the surgically implantable spacer and the same second, opposite end of the upper contacting surface of the surgically implantable spacer equals the resistance force applied at the first end.

A surgically implantable spacer comprising:

• a proximal control arm rotational pivot shaft member comprising a proximal control arm proximal end block, a pair of proximal control arm rotational pivot shafts, each proximal control arm rotational pivot shaft extending linearly outward from opposite sides of the proximal control arm proximal end block, a proximal control arm smooth walled bore extending through the proximal control arm proximal end block in a direction generally perpendicular to an axial direction of the pair of proximal control arm rotational pivot shafts;
• a distal control arm rotational pivot shaft assembly comprising a distal control arm rotational pivot shaft assembled to a threaded member receiving block by an assembly component, a threaded bore extending through the threaded member receiving block in a direction generally perpendicular to an elongated axis of the distal control arm rotational pivot shaft;
• a threaded control member extending through the proximal control arm smooth walled bore and threadably assembled to the threaded bore extending through the threaded member receiving block;
• a lower disc replacement support truss assembly comprising a near or first side lower disc replacement support truss, a far or second side lower disc replacement support truss and a lower spanning control cross member spanning between distal ends of the near or first side lower disc replacement support truss and the far or second side lower disc replacement support truss, each of the near or first side lower disc replacement support truss and the far or second side lower disc replacement support truss being pivotally assembled to the respective proximal control arm rotational pivot shaft of the pair of proximal control arm rotational pivot shafts;
• a upper disc replacement support truss assembly comprising a near or first side upper disc replacement support truss, a far or second side upper disc replacement support truss and a upper spanning control cross member spanning between distal ends of the near or first side upper disc replacement support truss and the far or second side upper disc replacement support truss, each of the near or first side upper disc replacement support truss and the far or second side upper disc replacement support truss being pivotally assembled to the respective proximal control arm rotational pivot shaft of the pair of proximal control arm rotational pivot shafts;
• a lower truss expansion control member having a first end pivotally assembled to the distal control arm rotational pivot shaft and a second, opposite end pivotally assembled to the lower disc replacement support truss spanning control cross member;
• and
• a upper truss expansion control member having a first end pivotally assembled to the distal control arm rotational pivot shaft and a second, opposite end pivotally assembled to the upper disc replacement support truss spanning control cross member.