The team first collected cellular samples from four volunteers and one cadaver, then grew them on collagen scaffolds. Surprisingly, the sample cells required just two weeks to grow into functional vocal cords. Once they were complete, the researchers tested the bioengineered larynxes by grafting them onto the kidneys of lab mice to prove they wouldn't be rejected by their new hosts. The initial tests proved highly successful. Future surgeries could either replace existing scarred cord tissue with a new set of pipes or patch smaller damage with single flaps.

Next up, the team plans to hold longer immunoresponse trials in mice before moving on to tests with larger animals in the next few years. Since these larynxes are bioengineered, the FDA requires stringent animal testing before human trials can begin so it will likely be a while before the technique makes it to your doctor's office.

[Image Credit: FilmMagic via Getty]