DHI Hair Transplant: What Is the Choi Implanter Technique?

The DHI hair transplant is the most advanced evolution 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 single motion — directly, precisely and with minimal trauma. In this article we explain how the Choi Implanter technique works, when it is more suitable than FUE and what costs to expect in Istanbul.

What Does DHI Hair Transplant Mean?

DHI stands for Direct Hair Implantation. The name captures the key difference from FUE perfectly: the grafts are not inserted into pre-opened channels but are implanted directly into the scalp using 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 the premium variant of hair transplantation — particularly in specialised clinics in Istanbul.

The Choi Implanter Technique in Detail

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

The procedure:

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

Advantage: angle, direction and depth can be controlled to the millimetre. Since no pre-made channels are required, the time between extraction and placement is shorter — which increases the graft survival rate.

DHI vs. FUE: An Honest Comparison

Both methods deliver excellent results but differ in key aspects. Here are the most important criteria compared side by side:

Density and Natural Look

DHI: Due to the closer spacing between grafts (up to 60 grafts per cm²), DHI achieves higher density. Results look particularly natural at the hairline and temples.

FUE: Standard density of 40–50 grafts per cm² — perfectly sufficient for most patients. Natural-looking results are also achievable with experienced teams.

Shaving

DHI: Often only partial shaving required (donor area only). Ideal for women or men who do not want to cut their hair short.

FUE: Complete head shave is usually required.

Operation Duration

DHI: Longer — 8–10 hours, as two steps are combined into one. For large areas, the procedure is 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 — less suitable for larger areas.

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

Healing and Discomfort

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

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

Costs

DHI: 20–40% more expensive than FUE — due to higher staffing requirements and longer operating time.

FUE: More affordable; better choice for large areas.

Advantages of DHI Hair Transplantation

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

Disadvantages of DHI Hair Transplantation

• Higher cost than FUE
• Longer operating time
• Often not ideal for large bald areas (fewer grafts per session)
• Requires a specially trained team — not every clinic offers genuine DHI

Who Is the DHI Method Suitable For?

DHI hair transplantation is particularly recommended for:

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

For advanced hair loss covering a large area, the classic FUE method is often the more practical choice.

DHI Costs in Istanbul 2026

DHI hair transplantation in Istanbul is 20–40% more expensive than a comparable FUE. Typical package prices in 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 procedure easily costs €12,000–18,000 — for the same number of grafts. A full overview can be found in our article on hair transplant costs 2026.

DHI Hair Transplant: Step-by-Step Procedure

1. Consultation and Analysis: Hair analysis on the day of arrival, determination of hairline and graft count.
2. Partial or Full Shave: Depending on preference and graft count.
3. Local Anaesthesia: Numbing of donor and recipient areas.
4. Graft Extraction: Individual follicles are removed using 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 initial aftercare instructions

DHI Results: Timeline

• Week 1: Healing, mild swelling and redness.
• Weeks 2–4: Shock loss — the transplanted hairs shed. Important: the follicles remain active.
• Months 3–4: First new hairs begin to grow.
• Months 6–8: Density of 60–70%.
• Month 12: Result approximately 90% visible.
• Months 15–18: Final result achieved.

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

Aftercare: How to Protect Your Results

Post-DHI aftercare is similar to FUE, but often easier in the first days as there are no visible channels. Key points:

• Gentle sleeping with head elevated (first 7 days)
• No headwear for the first 3 days
• No sun exposure on the scalp for 4 weeks
• No sport, sauna or swimming for 3 weeks
• No alcohol or nicotine for at least 10 days
• First hair wash at the clinic the day after the procedure

Frequently Asked Questions About DHI Hair Transplantation

Is DHI better than FUE?

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

Can every clinic offer DHI?

No. The Choi Pen technique requires specialised training and experience. Look for clinics that offer genuine DHI with trained teams — not just implanter needle procedures marketed as DHI.

How long do I need to stay in Istanbul?

Three nights are standard: arrival, procedure, check-up and first hair wash. An extra recovery day is never a bad idea.

Does DHI hurt?

Not during the procedure, thanks to local anaesthesia. Mild tension or discomfort may occur in the first days, which is well managed with pain relief medication.

Are the results permanent?

The transplanted hairs come from the genetically stable donor area and are generally permanent. Existing native hair may continue to thin — which is why many experts recommend supporting therapies such as finasteride or PRP.

Conclusion

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

Further reading: Hair Transplant: The Complete Guide