We are already rapidly approaching a permanent end to scar tissue. Currently there is a company in the north east researching something called extracellular matrix, which occurs in virtually all animal forms, but primarily in connective tissue and cartilage. ECM consists of many long proteins, Collagen, which help hold cells in place, and when extracted to make a powder, have an amazing effect on open wounds. What happens in scarring is that collagen normally meshes together randomly to hold the cells as they are, but during healing cells have to re-create the ECM from scratch, and apparently find it much easier to form collagen in alignment in a single direction. Also, in normal healing local cells will produce extra collagen to make up for the ecm lost in the wound. At the end of healing these two factors combine to produce extra collagen and thus a scar. However, when the ECM is placed on the wound as a powder, the cells sense that it is there and thus do not produce their own from scratch, and because they are already in the random order, the healing proceeds not only more quickly but with no scar tissue whatsoever.
If you are interested, here are some links for further reading:
Wikipedia on Collagen: http://en.wikipedia.org/wiki/Collagen
Wikipedia on Scar-tissue: http://en.wikipedia.org/wiki/Scar
Research article on Production and characterization of ECM powder: implications for tissue engineering applications: http://www.sciencedirect.com/science/article/pii/S0142961204004399
Generic website dedicated to ECM powders: http://www.ecmpowders.com/