Verfügbar ab den 1. August 2017 bei Curmed AG !
The SWANSON Finger Joint implant can be used with resection arthroplasty of the metacarpophalangeal and proximal interphalangal (PIP). Insertion of the finger joint implant at two consecutive joint levels is not recommended (e.g., MP and PIP joint levels).
Flexible Finger Joint Implant
The SWANSON Finger Joint Implant is a flexible intramedullary-stemmed, one-piece implant developed as an adjunct to resection arthroplasty to help restore function to hands disabled by rheumatoid, degenerative or traumatic arthritis. The midsection of the load-distributing flexible hinge has been designed to help maintain proper joint space and alignment with good lateral stability and minimal flexion-extension restriction. The implant is not fixed to bone and becomes stabilized by the encapsulation process. It acts as a dynamic spacer, internal mold and flexible hinge.
The SWANSON Finger Joint Implant is available in 11 sizes to adequately meet various anatomical requirements. A color-coded sizing set (supplied non-sterile and not suitable for implantation) is available for proper size determination during surgery.
The flexible implant resection arthroplasty method is based on the following concept: “Joint Resection + Implant + Encapsulation = Functional Joint.” The implant acts as a dynamic spacer to maintain internal alignment and spacing of the reconstructed joint and as an internal mold that supports the capsuloligamentous system developing around the implant while early guided motion is started. The implant becomes stabilized by this “encapsulation process,” and no permanent fixation is required. Joint stability is achieved from reconstruction of the ligamentous and musculotendinous systems. Because the implant is not fixed to bone, the compressive loading forces are effectively distributed to the resected end of the bone and cortical shaft. This encourages favorable bone remodeling processes as evidenced by maintenance of bone length, preserved shape of the amputated bone end, cortical thickening, and new bone formation next to the implant midsection and intramedullary stems. The slight movement of the implant stems allows distribution of forces over a broader section and allows the flexible hinge to find a better position with respect to the axis of rotation of the joint. Thus the implant life is increased and the bone is less likely to react at the implant interface when the forces are within its strain tolerance. The low modulus implant is softer than bone and has force-dampening characteristics that further protect bone and cortical shaft. Because bone removal is minimal and implants are not attached to bone, revision procedures to remove or replace an implant, or to reinforce, release, or realign capsuloligamentous structures around the implant are easily performed.
The SWANSON Finger Joint Grommets are thin bone liners designed for use at the metacarpophalangeal joint level. The press-fit encircling grommet is fabricated from unalloyed titanium and its shape conforms to the contours of the implant midsection and stem junctions.
The use of grommets to enhance implant durability is especially indicated in severe cases of rheumatoid arthritis where irregular and sharp bony edges can initiate tears in the implant midsection. Grommets are available in 7 sizes corresponding to sizes 3 to 9 of the SWANSON Finger Joint Implant. The outer surface of each grommet is marked with a numeral, indicating the size of finger joint implant the grommet fits, as well as the letters “P” or “D”, indicating whether it is a proximal or distal grommet.
OP-Technik OP-Technik (Video)