Bionics is a science in which scientists and engineers take an example from the living nature and reconstruct it into mechanical device. This science is developing rapidly in present days and finds more applications in medicine, military, industries, etc. The subject of this article is precisely the main achievements of this science in medicine.
  
1.Bionic hand : There are many scientific teams that develop researches in this direction. More specifically we will take a view over i-limb ultra, developed by Touch Bionics. It allows people with amputated upper limbs to properly serve their daily needs – picking up small objects, Typing, dressing, and many others. Software allows the patient to create his own gestures and movements. Of course, it can’t fully replace real human hand, but is a kind of convenience for the patient. via: touchbionics.com 
2.Exoskeleton : These are hydraulic or electric mechanisms that assist people with walking difficulties or extend the capabilities of people without problems in this regard, such as weightlifting, which would be unbearable without such a mechanism. via:exoskeleton-suit.com 
3. Bionic eye : This mechanism allows some recovery of eyesight if the optic nerve is saved healthy. In most cases, this is a small camera attached to the eyeglasses. The camera takes a photo and sends it to an electronic module, hanging on the belt of the patient. The picture is black-and-white, with low resolution, i.e. perceive only rough outlines and there is no color vision. After processing of the electronic module picture is transmitted wirelessly to the antennas close to the eyeball. These antennas forward the signal to electrodes implanted into the retina. Another direction in this regard is the use of photovoltaic plate which converts light into electrons and delivers it to the brain via the optic nerve. At the moment this technology allows only making a difference between light and dark.via: spectrum.ieee.org/ ,bbc.co.uk

4. Replacement and regeneration of broken bones : Whole lower jaw made of titanium was implanted to 83 years old Belgian woman who suffered from mouth cancer and infection. Her new mandible was not rejected by the woman’s organism.via:spectrum.ieee.org
Thin layers of hydroxyapatite :  enhance repair process of bone tissue: spectrum.ieee.org
5. Others :

Reconstruction of body organs : Nanocomposite, developed by University College London, serves as a scaffold at which stem cells are attached and then grow and form a new organ: spectrum.ieee.org 
Synthetic skin : Two scientific teams (University of California and Stanford) developed independently polymeric tissue with the sensitivity of human skin:spectrum.ieee.org
DNA machines : It is a joint development by scientists from three universities: Hebrew University of Jerusalem in Israel, the University of Liege, in Belgium, and the University of California, Los Angeles. This is a sequence of DNA with three activators (“triggers”) which are activated by various factors. When activated, they bring into service that DNA, which is leading to synthesis of drug or substance, which treats the infection/disease. spectrum.ieee.org