DHI Hair Transplantion

The DHI implantation method and Choi Implanter pen

There is a lot of controversy around this method. Some define it as the latest hair transplant method, some say there is no recognized technique called DHI, others claim that this is just a marketing ploy, while a fraction explains the method as;

FUE with implanters.

In fact, it all comes down to different ways of obtaining grafts in combination with different implantation procedures.

Unlike the FUE method, during the DHI implantation process, the creation of the recipient site and the implantation of the graft are carried out simultaneously, i.e. extraction and implantation are combined in one step. The extracted hair follicles are incorporated directly in the recipient areas without the need to create canal incisions.

L’implant / Choi pen has a very fine cylindrical shape and a pointed tip. This Choi cylindrical tip needle is shaped like a channel and allows hairs to be inserted into the needle while the needle is guided through it.. This is why the DHI procedure is also called the Choi method.

The DHI method procedure

  1. During the hair transplant procedure performed with the Choi implanter, doctor / specialized surgeon or technicians transfer the collected grafts to the handle of the implant. The graft is carefully inserted into the hollow needle at the end of the implant handle to be administered to the specialist physician.
  2. The needle is then inserted at an angle by the surgeon precise to 40-45 degrees in the scalp when making the incision, then the graft is implanted by pressing the plunger
  3. The procedure typically uses a varying number of 2 at 6 Choi implanters and around 15 at 16 needles at a time, and the device is available with different needle sizes to accommodate follicular unit transplants

The Choi method decently has its advantages as well as its disadvantages compared to the FUE technique.

Advantages of the DHI technique


  • Reduced time grafts stay outside the body, allowing the establishment of healthy grafts
  • Adequate survival of hair follicles
  • Reduction of bleeding during creation of the recipient area
  • Reduced trauma during graft manipulation, resulting in less damage to the blood supply to the implanted area
  • Faster recovery in the postoperative phase, a patient returns to their daily routine faster
  • The reseveur site should not be shaved, because it is a procedure that allows this condition

Disadvantages of the DHI technique

  • The physician and staff members undergo extensive long-term training to specialize in the use of this technique
  • It is a procedure which is more expensive compared to other hair transplantation techniques
  • This method requires greater concentration of attention as well as greater precision during the procedure.