DHI Hair Transplantation: What is the Choi Implanter Technique?

The DHI Hair Transplantation is the most modern advancement of the classic FUE method and is based on the so-called Choi Implanter Pen. Instead of two separate steps (channel opening and implantation), the hair follicles are placed in one go — directly, precisely, and particularly gently. In this article, we explain how the Choi Implanter technique works, when it is better suited than FUE, and what costs you can expect in Istanbul.

What does DHI Hair Transplantation mean?

DHI stands for Direct Hair Implantation — Direct Hair Implantation. The name highlights the difference from FUE: The grafts are not placed in previously opened channels, but directly implanted into the scalp with a special pen instrument (Choi Pen).

The technique was developed in the 1990s in South Korea at Kyungpook National University Hospital. Since around 2010, DHI has established itself worldwide as a premium variant of hair transplantation — especially in specialized clinics in Istanbul.

The Choi Implanter Technique in Detail

The heart of DHI is the Choi Implanter Pen: a hollow, needle-like pen with a diameter of 0.6 to 1.0 mm. After extraction, each graft is loaded individually into the pen and then inserted and implanted into the scalp — all in one motion.

The process:

1. Extraction: As with FUE, the grafts are extracted individually from the donor area.
2. Loading: Each graft is loaded into the Choi Pen (in practice, experienced teams use 4–6 pens in parallel).
3. Implantation: The surgeon inserts the pen at the desired angle into the scalp and presses the graft into the correct depth using a button mechanism.

Advantage: Angle, direction, and depth can be controlled to the millimeter. Since no pre-channels are necessary, the time between extraction and insertion is shorter — which increases the growth rate.

DHI vs. FUE: The Honest Comparison

Both methods deliver excellent results, but there are differences. Here are the key criteria in direct comparison:

Density and Natural Look

DHI: Due to the closer spacing between the grafts (up to 60 grafts per cm²), DHI achieves a higher density. Especially at the temples and hairline, the result looks very natural.

FUE: Standard density of 40–50 grafts per cm² — completely sufficient for most patients. Here too, natural results can be achieved with experienced teams.

Shaving

DHI: Often only partial shaving necessary (only donor area). Ideal for women or men who do not want to give up long hair.

FUE: Complete shaving of the head is usually required.

Duration of the operation

DHI: Longer — 8–10 hours, as two steps are performed in one. For large areas, often spread over two days.

FUE: 6–8 hours for the same number of grafts.

Number of grafts per session

DHI: Up to 4,000 grafts per session — rather unsuitable for larger areas.

FUE: Up to 5,500 grafts per session — better for advanced baldness.

Healing and pain

DHI: Minimally invasive, faster healing (5–7 days), less crusting.

FUE: Healing in 7–10 days, slightly more visible crusting in the first week.

Costs

DHI: 20–40 percent more expensive than FUE — due to higher personnel costs and longer surgery time.

FUE: Cheaper, better choice for large areas.

Advantages of DHI hair transplantation

• Higher density per cm² — especially advantageous at the hairline and temples
• No channel opening necessary — less bleeding, faster healing
• Shorter time outside the body for the grafts — higher growth rate (up to 95%)
• Partial shaving possible — ideal for women or discreet procedures
• Minimally invasive — fewer side effects

Disadvantages of DHI hair transplantation

• Higher costs than FUE
• Longer surgery duration
• For large bald areas often not ideal (fewer grafts per session)
• Requires specially trained team — not every clinic offers true DHI

Who is the DHI method suitable for?

DHI hair transplantation is particularly recommended for:

• Patients with smaller, defined areas (hairline, temples, crown area)
• Women who do not want to shave their hair completely
• Patients who desire a particularly high density
• Individuals who need as quick a recovery as possible
• Beard transplants — here DHI delivers particularly precise results

In cases of advanced hair loss with large areas, the classic FUE method is often the more practical choice.

DHI costs in Istanbul 2026

The DHI hair transplant is 20–40 percent more expensive in Istanbul than a comparable FUE. Typical package prices 2026:

• DHI Basic Package (up to 2,500 grafts): 2.900–3.500 €
• DHI Premium Package (up to 4,000 grafts): 3.500–4.500 €
• All-inclusive with hotel, transfer, aftercare: 3.800–5.200 €

For comparison: In Germany, Austria, and Switzerland, a DHI costs slightly 12,000–18,000 € — for the same number of grafts. A complete overview can be found in our article on the Hair Transplant Costs 2026.

Process of a DHI hair transplant step by step

1. Consultation and analysis: On the day of arrival, hair analysis, determination of hairline and number of grafts.
2. Partial shave or full shave: Depending on preference and number of grafts.
3. Local anesthesia: Numbing of donor and recipient areas.
4. Graft extraction: Individual follicles are extracted with a micro-punch.
5. Loading the Choi pens: Each graft is loaded into a pen.
6. Implantation: Grafts are implanted directly into the scalp without channel opening.
7. Dressing and first aftercare instructions

DHI results: Timeline

• Week 1: Healing, slight swelling and redness.
• Week 2–4: Shock loss — the transplanted hairs fall out. Important: The follicles remain active.
• Month 3–4: First new hairs grow.
• Month 6–8: Density of 60–70 percent.
• Month 12: Result visible at about 90 percent.
• Month 15–18: Final result achieved.

Individual results vary. Healing, growth rate, and final density depend on genetics, donor capacity, aftercare, and lifestyle.

Aftercare: How to protect your result

Aftercare following a DHI is similar to that of a FUE, but often easier in the first few days as there are no visible channels. Important:

• Gentle sleeping with elevated upper body (first 7 days)
• No head covering in the first 3 days
• No sun on the scalp for 4 weeks
• No sports, no sauna, no swimming for 3 weeks
• No alcohol, no nicotine for at least 10 days
• First hair wash in the clinic the day after

Frequently Asked Questions about DHI hair transplantation

Is DHI better than FUE?

"Better" depends on the goal. For high density, small areas, and quick healing, DHI is often superior. For large bald areas with many grafts, FUE is usually the more practical and cost-effective choice.

Can any clinic offer DHI?

No. The Choi pen technique requires special training and experience. Look for clinics that offer genuine DHI with trained teams — no "false promises" with simple implanter needles.

How long do I need to stay in Istanbul?

Three nights are common: arrival, surgery, check-up, and first hair wash. An additional recovery day is beneficial.

Does DHI hurt?

Not during the surgery, thanks to local anesthesia. In the first few days, mild tension sensations may occur, which can be well controlled with painkillers.

Is the result permanent?

The transplanted hairs come from the genetically stable donor area and are usually permanent. Existing natural hairs may continue to fall out — that's why many experts recommend accompanying therapies like Finasteride or PRP.

Conclusion

DHI hair transplantation is the premium variant of modern hair transplantation: more precise, denser, and gentler than classic FUE — but also more expensive and time-consuming. It is ideal for hairline corrections, receding hairlines, and beard transplants. For large areas, FUE is often the more economical choice. In both cases, the experience of the clinic is crucial.

Further: Hair Transplantation: The Complete Guide