DHI (Direct Hair Implantation) hair transplant technique can be said to be a variation of the FUE technique. With the DHI, hair follicles extracted from the donor area can be directly embedded into the receipt areas without creating the channels via utilizing an implanter (choi) pen that features a hollow needle connected to a tub and plunger device. Therefore, it can be described as a technique that combines 2 steps of FUE in one process.
Graft collection is performed as in the FUE method. However, the implanting procedure is completely different. The difference that distinguishes the DHI method not only from the FUE technique but from all other techniques is using of a special pen which is called Choi pen during implanting process. In addition, unlike other methods in the DHI method, there is no need to shave hair to the planting area. The advantage of unshaved hair transplantation makes DHI more preferred especially by women.