DHI Technique

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What is the DHI technique?

We understand that the evolution of technology offers us different methods to solve the problems encountered in everyday life. The same things happens for baldness, and several methods are currently available on the market, including the DHI technique, based on capillary insertion.

It differs from other methods by the way grafts are implanted. The acronym corresponds to "Direct Hair Implant" .

Definition of DHI/Choi technique

What immediately differentiates the DHI technique from the FUE is the implantation of the grafts, even if the previous technique is more recognizable. In contrast, in the DHI technique, the incision and implant are made simultaneously, and it is not necessary to open the channels before the implant.


The process is accomplished by using an implant pen (Choi) that resembles an empty needle that is connected to a tube and a pushing device. Therefore, the DHI technique is also known as the Choi method.

The implant process

 When you are in a hair transplant procedure using the Choi implant, the specialist inserts the follicles into the implant pen. The follicle is lightly embedded inside the naked needle, which is placed at the end of the pen, then repositioned by the physician.

Then the surgeon implants the needle at a 40-45 degree angle on the scalp while the incision is made implanting the graft by pressing on the pushing device that is connected to the tube.

During a procedure, we will use between 12-14 Choi pens and 15-16 needles. The device comes in a variety of needle sizes to fit the follicular unit grafts.

Advantages of DHI technique

The following benefits can be defined by viewing the entire process:

• Reduce the time that the grafts remain outside the body.

• Reduction of bleeding.

• Reducing trauma during follicular administration.

• Rapid recovery in the postoperative phase.

• Hair does not need to be shaved before surgery.

Seeing the scientific and technical progress, a new era has been created that produces efficient and safe results, but most especially a natural look. The Choi Pen belongs to these because it has considerably improved hair restoration procedures.