gms | German Medical Science

Objectives/Interrogation: Wrist joint osteoarthritis for any reason is difficult to treats condition especially in the end stage of the disease. Theoretically, total wrist replacement seems to be the preferred option for wrist joint surgical treatment as the issue to wrist motion and pain relief. However, practically it has not happened. The explanation is that a concept almost all existing implants does not accurately reflect the biomechanics of the wrist. The wrist joint is nonlinear in their visual appearance. However, it is possible to find linearity of nearly all nonlinear biological systems on the base of the fractals. Autor finds linearity of the healthy human wrist joint according to the mathematical processing of the anthropometric data. With the help of the fractals, Fibonacci Golden section and spirals, a new opportunity was opened to explain the biomechanics of a human wrist joint. This opportunity logically can be defined as "A fractal theory of the biomechanics of the wrist joint" and help design and built the optimal and universal total wrist joint prosthesis called WristArt

Methods: According to the fractals and spirals of Fibonacci, a linear model of the wrist joint built. That model determined two centers of rotation into the capitate bone. Universal one size and no side difference universal prosthesis were constructed. WristArt consists of three main parts: capitate, radial and articular. Articular part design allows for double motion. The capitate component connects to the Capitate bone only thru the plate-like fixation. Radial component reconstructs articular surface with the resurfacing plate and links to the distal radius as a dorsal radial plate. Two oblique locking screws connect between the dorsal radial plate and lover part of resurfacing plate and create strong Pyramid like structure

Results: WristArt avoids conversion polyarthrodial joint into a diarthrodial. That prevents excessive shearing, and bending forces on the joint and potential fatigue and insufficiency of the exist prosthetic wrist devices.

Conclusion: The Universe inside you. It is easy to find the solution when one has an open mind to explore our world and employ Universe and Nature's own design to create a solution. Perfection exists the knowledge and beauty solution exist in perfection. And the beauty solution for wrist replacement is the correct and ideal prosthetic design. WristArt design closed to Nature's design and may give hope return the patients fine movements without pain for a long time.