Automend is a new plastic material. It is yellowish and transparent. If it cracks it heals itself. All that is needed is heat. A hair dryer could do the trick. The 'scar' will not show. Self-help is the best help!
Surgeons use a plastic nerve to cover a damaged nerve. It does what all nerves do, carries signals through the body. This plastic nerve has a sugar molecule. This helps the new nerve to grow quickly. In 6 weeks, the plastic nerve disintegrates. By that time the new nerve is ready to take over. Ready to say 'Hey! I'm the boss!'