Dynamic ligament balancing system with pin positioning block
A surgical pin positioning block comprising a top portion comprising a pin position dial including one or more pin hole guides, the pin position dial setting angular pin positions of the one or more pin hole guides, wherein the one or more pin hole guides includes an orifice for drilling of pin holes, one or more dial position notches that secures the pin position dial in a given angular pin position, one or more sliding members coupled with one or more receptacles of a bottom portion, the bottom portion comprising the one or more receptacles, an adapter including one or more prongs that attach to a prosthetic inlay device, and a locking mechanism for securing the one or more sliding members in the one or more receptacles.
1. A surgical pin positioning block comprising:
a top portion and a bottom portion each having a proximal surface and a distal surface opposite the proximal surface;
a pin position dial including one or more pin hole guides, the pin position dial pivotally coupled to the top portion for setting angular pin positions of the one or more pin hole guides, wherein the one or more pin hole guides includes an orifice for drilling of pin holes;
one or more dial position notches located on the top portion that secures the pin position dial in a given angular pin position relative to the top portion;
one or more sliding members extending from the top portion;
a bolt that adjustably extends distally through the proximal and distal surfaces of the top portion, the bolt stabilizing the top portion of the pin positioning block to a patient's bone;
one or more receptacles in the bottom portion for receiving in a sliding arrangement the one or more sliding members extending from the top portion;
an adapter including one or more prongs extending outward from the distal surface of the bottom portion that attach the surgical pin positioning block to a prosthetic inlay device; and
a lock for securing the one or more sliding members in the one or more receptacles therewith setting a distance between the bolt and the bottom portion.
2. The surgical pin positioning block of claim 1 wherein the top portion further comprises a pin position dial indicator that indicates the given angular pin position of the pin position dial.
3. The surgical pin positioning block of claim 1 wherein the pin position dial is operable in clockwise and counter-clockwise directions for setting the angular pin positions of the one or more pin hole guides.
4. The surgical pin positioning block of claim 1 wherein the one or more pin hole guides are on opposite distal ends of the pin position dial.
5. The surgical pin positioning block of claim 4 wherein the angular pin positions of the one or more pin hole guides are inversely related.
6. The surgical pin positioning block of claim 1 wherein the top portion is extendable from the bottom portion via the one or more sliding members coupled with the one or more receptacles.
7. The surgical pin positioning block of claim 1 wherein the lock sets a vertical pin position of the one or more pin hole guides relative to the one or more prongs.
8. The surgical pin positioning block of claim 1 wherein the bottom portion further comprises a caliper configured as a tibial plate sizer.
9. The surgical pin positioning block of claim 1 wherein the prosthetic inlay device comprises:
at least two platform structures, wherein each of the platforms are supported on a scissor arm structure and a spring, and wherein each of the platforms are configured to variably depress the spring as a function of joint flexion angle when placed in situ;
a force sensing sensor configured beneath each spring, the force sensing sensor detecting pressure from depressing the spring at each of the at least two platform structures; and
a communication interface coupled to the force sensing sensors, the communication interface transmitting data corresponding to the detected pressures to a computing device that generates a set of heights corresponding to medial and lateral tension on joint tissue based on the detected pressures at a plurality of reference angles of the joint.