What is DHI?

Direct Hair Implantation (DHI) is a hair restoration technique that shares its foundation with Follicular Unit Extraction (FUE). Both methods involve harvesting individual hair follicles (grafts) from a donor area on the scalp, typically the back and sides of the head, where hair growth is genetically resistant to balding. However, the key difference lies in the implantation process.

Understanding DHI Technique

In FUE, even with the utilization of advanced tools like Sapphire blades, small incisions are created in the recipient area before placing the grafts. These incisions can be microscopic, but they still require a separate step. In DHI, a specialized pen-like device called a Choi implanter combines both extraction and implantation into a single, simultaneous action. This eliminates the need for pre-made incisions, potentially minimizing trauma to the scalp and surrounding tissue.

Advantages & Considerations

Potential advantages of DHI include:

• Reduced transection rate: By eliminating the need for separate incisions, DHI may minimize the risk of accidentally damaging the hair follicles during implantation.
• Higher density: The Choi implanter allows for precise control over the angle and direction of hair growth, potentially leading to a more natural-looking hair density.
• Shorter healing time: Due to less scalp manipulation, DHI may promote faster healing and potentially less post-operative discomfort.

Considerations:

• Cost: The specialized tools and potentially longer procedure time associated with DHI can make it a more expensive option compared to FUE.
• Graft viability: While the simultaneous extraction and implantation might seem efficient, it is crucial to ensure the grafts remain healthy throughout the process within the Choi implanter.
• Limited coverage: DHI typically involves transplanting fewer grafts per session compared to FUE, potentially requiring more sessions to achieve the desired hair density.

During the DHI procedure, hair follicles are extracted from the donor area and implanted directly into the recipient area using the Choi Implanter Pen, typically lasting 6 to 8 hours with up to 3500 follicles transplanted.

Post Operational Guidelines

After undergoing the procedure, proper aftercare is crucial for successful results and hair restoration. Here are the essential instructions to follow:

Keep the head upright and minimize bending for three days to prevent swelling around the forehead and eyes.

Wear a headband for 48 hours to reduce swelling.

Avoid washing the hair for three days post-procedure.

Refrain from swimming in the sea for three months and in pools for two months to protect newly implanted follicles.

Avoid direct sunlight, heat, rain, dust, and high humidity for at least a month; consider wearing a medical hat outdoors.

Quit smoking for at least two months, as it can hinder follicle growth and lead to hair loss.

Use only medical shampoo for hair washing; avoid chemical shampoos.

Avoid Turkish baths, steam baths, or saunas for at least a month, as they can harm follicles.

Adhere to prescribed treatments and medications to promote wound healing and hair follicle growth.

Refrain from sexual intercourse for a week.

Following these instructions, patients can gradually resume work and daily activities shortly after the procedure.

They Key Differences Between DHI & FUE Techniques

Both FUE (Follicular Unit Extraction) and DHI (Direct Hair Implantation) are minimally invasive hair transplant procedures used to address hair loss. However, they differ in how the hair follicles are extracted and implanted.

Extraction

• FUE: In FUE, individual follicular units are extracted one by one from the donor area (usually the back of the scalp) using a small punch tool. These follicular units contain 1-4 hairs each.
• DHI: Similar to FUE, DHI also extracts follicular units one by one from the donor area. However, the extraction tool may be slightly different.

Implantation

• FUE: After extraction, the follicles are stored in a chilled solution before being manually implanted into tiny recipient channels created in the balding area. This step requires separate expertise for channel creation and follicle placement.
• DHI: DHI uses a specialized implanter pen that combines extraction and implantation in a single step. The pen extracts a follicle unit and simultaneously implants it directly into the recipient area at the desired angle and depth. This eliminates the need for pre-made channels.

Hair follicle growth becomes noticeable approximately six months post-procedure, with full results typically visible after one year.