Bionics has moved well beyond basic prosthetic limbs. The newest applications span brain-controlled computers, artificial skin that outperforms human touch, wearable exoskeletons for children with mobility impairments, and prosthetic hands that let users feel temperature and texture. Several of these technologies are already in clinical trials or active patient use, not just lab demonstrations.
Prosthetics That Restore the Sense of Touch
For decades, prosthetic limbs could move but couldn’t feel. That’s changing. Advances in neuroprosthetics now make it feasible to restore tactile, proprioceptive, and thermal sensations through interfaces with peripheral nerves, the spinal cord, or the skin itself. In practice, this means a person wearing a prosthetic hand can sense whether they’re gripping a hot coffee mug or gently holding someone’s hand.
What makes this generation of sensory prosthetics different is the combination of multiple feedback channels. When touch and temperature signals work together, users describe the experience as natural and emotionally meaningful, not just functional. That emotional dimension matters: people report feeling greater agency over their prosthetic and stronger social connection with others. It’s the difference between operating a tool and having a hand.
Direct-to-Bone Prosthetic Attachment
Traditional prosthetics attach to the body through a socket that fits over the residual limb. Sockets cause skin irritation, pressure sores, and limit the range of motion. A newer surgical approach called osseointegration skips the socket entirely by anchoring a titanium implant directly into the bone, with a metal post protruding through the skin to connect the prosthetic.
A study of 90 lower-limb amputees using contemporary press-fit titanium implants found 94.2% implant survival at five years. The tradeoff is infection risk: 36% of patients experienced at least one infection during the study period, though 95% of those were soft-tissue infections around the skin opening rather than deep bone infections. Serious complications like septic loosening of the implant occurred in only 4% of patients. For people who can’t tolerate a traditional socket, this approach offers a more stable, comfortable connection to their prosthetic with a direct mechanical link to the skeleton.
Brain-Computer Interfaces
Brain-computer interfaces (BCIs) translate neural activity into digital commands, letting people control technology with thought alone. Neuralink is currently running clinical trials investigating two capabilities: controlling a computer and robotic arm through thought, and decoding words directly from neural activity. The second goal, if successful, would allow people with severe paralysis or locked-in syndrome to communicate by simply thinking of what they want to say.
Other research groups have been working on similar technology for longer, with some paralyzed participants already able to type, browse the internet, and operate tablets using implanted electrode arrays. The newest systems aim to make these interfaces smaller, wireless, and reliable enough for unsupervised daily use rather than just lab sessions.
Electronic Skin Sensitive Enough to Feel a Flower Petal
Engineers at Stanford developed a polymer-based pressure sensor that dramatically outperforms human skin. A gentle human touch registers pressure in the kilopascal range. This sensor operates below ten pascals, making it roughly a hundred times more sensitive. In testing, it detected the placement and removal of a single flower petal weighing just 8 milligrams, corresponding to a pressure of about 0.8 pascals.
The sensor works through an elastic microstructured conducting polymer: essentially a foam made of tiny conducting microspheres that changes its electrical resistance when compressed. The material is flexible and can be fabricated into small pads. This kind of electronic skin has applications beyond prosthetics. Robots handling delicate objects, surgical instruments that need to gauge tissue pressure, and wearable health monitors that track subtle physiological changes could all benefit from sensors this precise.
Wearable Exoskeletons for Walking
Powered exoskeletons are no longer bulky lab prototypes reserved for adults with spinal cord injuries. Newer designs called exosuits use soft, lightweight materials and cable-driven actuators instead of rigid frames. Testing with 15 participants showed reduced metabolic cost during walking, increased walking speed, and decreased muscle activity in the calves, meaning the suit was genuinely sharing the physical load rather than just constraining movement.
One of the more promising developments is scaling these devices down for children. The Hybrid Assistive Limb exoskeleton was adapted and tested with roughly 20 children with cerebral palsy, producing improvements in walking speed, step frequency, and hip joint movement. A newer device called the Myosuit, tested on adolescents with neurological impairments, boosted walking speed by more than 10% in one participant who normally relied on a posterior walker. Notably, the Myosuit achieved this without increasing heart rate or muscle activity, suggesting it reduced the effort of walking rather than just speeding it up.
These soft exosuits are designed for daily activities, not just rehabilitation sessions. The goal is a device someone puts on in the morning like a pair of pants, wears throughout the day, and barely notices.
Bionic Vision Systems
Retinal implants aim to restore partial sight to people with degenerative eye conditions. The PRIMA Bionic Vision System, currently in clinical trials, uses a tiny chip measuring just 2 by 2 millimeters that’s implanted between the retinal cell layers. The chip contains 378 photovoltaic cells that convert light into electrical signals, stimulating the remaining retinal neurons to produce visual perception.
The current trial enrolls patients whose visual acuity is 20/400 or worse, which is beyond the threshold for legal blindness. The system won’t restore full sight. Instead, it aims to provide enough central vision for tasks like reading large print or recognizing faces. Patients wear special glasses that project amplified light onto the implant, which then activates the photovoltaic cells. Unlike earlier retinal implants that required external cables, the PRIMA chip is fully wireless and powered by the light itself.
Total Artificial Hearts
When a heart is too damaged for repair and no donor organ is available, a total artificial heart can serve as a bridge to transplantation. The SynCardia device, the most widely used system, replaces both ventricles entirely. A study of 100 patients supported on the device found a median time on support of 94 days, though some patients lived with the artificial heart for well over nine months.
The outcomes after transplantation are striking. Thirty-day survival following transplant was 96.7%, and five-year survival reached 77.5%. These numbers reflect how well the artificial heart kept patients alive and physiologically stable enough to undergo and recover from transplant surgery. Newer designs from companies like Carmat use biological materials on blood-contacting surfaces to reduce clotting risk, and are sized to fit a wider range of body types, including women and smaller adults who couldn’t accommodate earlier devices.
Where These Technologies Overlap
The most significant trend in bionics isn’t any single device. It’s the convergence of these technologies. A prosthetic arm that combines osseointegrated bone attachment, sensory feedback through nerve stimulation, electronic skin on the fingertips, and brain-computer interface control would give an amputee something approaching biological function. Each of those components exists today in some stage of clinical use or trial. The engineering challenge now is integration: making these systems work together reliably, comfortably, and affordably enough for everyday life.