DHI (Direct Hair Implantation) is not a new technique. In fact, it’s an improved version of FUE hair implantation, encompassing the same procedural steps and outcomes. In a FUE hair transplant, the doctor creates channels over the recipient area using sapphire blades and places the grafts into the opened channels. In contrast, the DHI method employs a tool resembling a ballpoint pen to insert the grafts into the recipient area without creating any channels. This tool is called the Choi pen.
Let us examine the process of DHI. A DHI hair transplant is performed using a Choi pen during implantation. This compact device, shaped like an interlocking ballpoint pen, has an outer Teflon coating and is designed to withstand temperatures of up to 130 degrees Celsius. The needle at the end of the pen is used to place the grafts. The needle resembles an injector but is vertical, with serrated endpoints. The serrated ends are designed in this way to facilitate the placement of hair grafts into the needle prior to the transplant.
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