DHI, known as Direct Hair Implantation, stands out among other hair transplant methods, particularly standard FUE (Follicular Unit Extraction), due to its distinct one-step implantation process using the innovative Choi Implanter Pen tool. While DHI is essentially a modified form of FUE, with both sharing the same follicle extraction technique, the key differences in implantation provide specific advantages in precision, minimizing trauma, and reducing recovery time.
The primary feature that sets DHI apart is its implantation method, particularly the process of reintroducing the harvested grafts into the areas of the scalp experiencing hair loss or thinning. In the standard FUE procedure, fine blades (made of steel or sapphire) are used to create slits in the recipient area, followed by forceps to place the grafts. In contrast, DHI utilizes the Choi Implanter Pen, a specialized cylindrical tool that combines the creation of recipient channels and the placement of grafts in a single step.
The Choi Implanter Pen is a unique instrument resembling a pen with a hollow needle at its tip. This tool allows the surgeon to load the extracted follicle into the hollow needle and then precisely implant it by inserting the needle into the scalp, creating a customized recipient channel and depositing the graft simultaneously. This direct, one-step approach is the key to unlocking the benefits of DHI.
The distinctive implantation technique of DHI offers several clinical and aesthetic advantages over traditional methods. Firstly, it provides enhanced precision and naturalness by allowing the surgeon to control the angle, depth, and direction of each implanted graft with greater certainty compared to using forceps. This precision is crucial for creating a soft, natural, and seamless frontal hairline and achieving density in areas like the temples or crown.
Moreover, DHI is associated with a higher graft survival rate due to reduced out-of-body time for the follicles and minimized handling trauma. By loading the grafts into the pen immediately after extraction, the follicles remain fresh and viable, leading to a slightly higher graft survival rate often exceeding 90%.
Additionally, DHI minimizes scalp trauma and accelerates the recovery process by eliminating the need for pre-made incisions and reducing overall trauma and bleeding in the recipient area. This results in reduced swelling, less scabbing, and a faster recovery time, allowing patients to resume their normal activities sooner than with standard FUE.
While DHI offers numerous benefits, it may not be the preferred choice for covering large areas or due to its higher cost compared to standard FUE. Nonetheless, DHI remains a superior option for targeted areas, unshaven procedures, and enhancing density without sacrificing existing hair.
In conclusion, DHI distinguishes itself from FUE through its single-stage implantation technique using the Choi Implanter Pen, emphasizing precision, minimal trauma, and graft survival for optimal results in hair transplantation.