Medically reviewed by Dr Mahmut Satekin, Medical Aesthetics Physician, Hair of Istanbul. Last reviewed: August 2026. Content checked against ISHRS guidance and peer-reviewed hair restoration literature.
The DHI technique is a graft placement method in which a sharp-tipped implanter pen creates the recipient site and delivers the follicular unit in the same movement. There is no separate incision step and no forceps.
The instrument is a hollow needle mounted in a pen-shaped handle with a plunger. A follicular unit is loaded into the lumen, the needle is introduced into the scalp at the planned angle and depth, the plunger releases the graft, and the needle is withdrawn. Because the follicle travels inside the needle, the bulb is never gripped.
The approach originated in Korea in the 1990s, where the Choi implanter was developed for placing single-hair grafts with controlled angle and depth into the hairline, eyebrows and eyelashes. It suited straight, thick Asian hair particularly well. As FUE spread through the 2000s, implanter placement was adopted more widely.
At a glance
A DHI hair transplant — direct hair implantation — places each follicular unit with a sharp-tipped implanter pen that creates the recipient site and seats the graft in one motion. It is a placement technique, not a way of harvesting: the follicles are still removed by FUE. Its advantages are angle, direction and depth control at the hairline, work among existing hair without cutting it, and procedures without shaving. Sessions run slower than forceps placement, so a typical DHI day transfers 2,000–3,500 grafts over 6–8 hours.
6–8 hours, single day
2,000–3,500 grafts
12–18 months
This matters, and most clinics avoid saying it.
DHI is often marketed as a distinct hair transplant “method”. It is not. The follicles are still harvested by FUE, one at a time, with a micro punch. What changes is only the final step — how the graft enters the scalp. The International Society of Hair Restoration Surgery is explicit that DHI describes an implantation workflow and the use of a sharp implanter, and should not be presented as a standalone method.
What this means for you as a patient.
If a clinic quotes you a higher price “because it is DHI”, you are paying extra for an instrument, not for a different operation. At Hair of Istanbul pricing is set by graft count. There is no surcharge for DHI, Sapphire or SLIT, and the technique is chosen on clinical grounds alone.
Saying this plainly costs us an upsell. It also happens to be true, and it is the reason the rest of this page can be specific rather than promotional.
All three describe how the recipient site is made and how the graft is placed. The harvest is identical in each.
| Method | How the site is made | How the graft is placed | Best suited to |
|---|---|---|---|
| DHI | Sharp implanter needle, at the moment of placement | Plunger releases the graft inside the needle | Hairline detail, unshaven work, densification among existing hair, eyebrows |
| Sapphire FUE | Sapphire-tipped blade, pre-made | Fine forceps into the open channel | Dense packing over larger areas |
| SLIT | Steel blade, pre-made slits | Fine forceps | Angle and direction control on the crown |
Most plans combine them — DHI along the frontal hairline where every graft is visible, Sapphire FUE behind it where volume matters more than individual placement. Read more about how follicles are harvested.
DHI gives finer control over each graft. It is also slower, which means fewer grafts in a working day and a longer procedure for the same coverage. For a Norwood V or VI needing broad coverage, spending the whole session on implanter placement usually serves the patient worse than combining methods. That is a planning decision, not a marketing one.
Four situations, where the instrument genuinely changes what is achievable:
The first one to two centimetres of the hairline are where a transplant is judged. Every graft there is a single-hair unit, placed at an acute 10–15° angle, and any that sits too deep, too shallow or at the wrong angle is visible for life. Because the implanter controls entry angle, direction and depth in a single controlled movement, it removes one source of variability at exactly the point where variability shows.
When the target area still holds native hair — a thinning crown, a receding but not bald frontal zone — pre-made incisions risk transecting the follicles already there. A sharp implanter enters between existing hairs under direct vision, one graft at a time. This is the strongest indication for DHI and the one where the difference is least arguable.
Placement between long existing hairs is far easier when the site is created and filled in one motion. It is the reason unshaven work is usually planned around DHI.
Brow restoration demands very acute angles — often 5–15° to the skin — and single-hair grafts throughout. See our eyebrow transplant page for the detail.
When we do not recommend DHI
The instrument is not a universal upgrade. These are the situations in which a different approach serves you better, and we will say so:
The same general contraindications apply as for any hair transplant: unstable hair loss, donor density too low for the area, active scalp disease, active scarring alopecia, uncontrolled systemic disease. These are set out in full on our FUE technique page.
The recipient area can stay unshaven. The donor area usually cannot. That distinction is where most confusion sits.
| Approach | What is shaved | Practical limit | Typically suits |
|---|---|---|---|
| Fully unshaven | Nothing | Up to roughly 1,500 grafts | Small frontal work, women, patients who cannot show a shaved head |
| Partially shaved | A donor strip concealed under longer hair above it | Up to roughly 2,500–3,000 grafts | Most patients wanting discretion |
| Donor shaved only | Donor area, recipient left long | Full session size | Densification among existing hair |
Unshaven harvesting is slower and the transection rate is harder to keep low, which is why graft numbers are capped. Where the numbers do not work, we say so before you book travel rather than shaving your head on the day.
The screening protocol is the same for every procedure at Hair of Istanbul, and it happens before a surgical date is confirmed: full blood panel, ECG reviewed by cardiology, anaesthetic assessment, densitometric donor analysis and hairline design. Where screening identifies a contraindication, the procedure is postponed or advised against.
Anticoagulant and antiplatelet use matters more in DHI than in most procedures, because simultaneous incision and placement makes bleeding harder to control. Management is agreed between cardiology and anaesthesiology before your date is set. Never stop a prescribed medication on your own initiative. The full screening table is on our FUE technique page.
Grafts are loaded before they can dry and without pressure on the follicular bulb. Loading and placement run on a continuous cycle so that no unit waits longer than necessary — time out of the body remains the strongest single variable in graft survival. Medical supervision of the procedure at Hair of Istanbul is the responsibility of Dr Mahmut Satekin, Medical Aesthetics Physician.
What happens: Hairline drawn and agreed with you in person, density map set per zone
Typical duration: 45–60 min
What happens: Local anaesthetic and tumescent infiltration, monitoring throughout by a specialist anaesthesiologist
Typical duration: 20–30 min
What happens: Follicular units excised by FUE with 0.7–1.0 mm micro punches
Typical duration: 2–3 hours
What happens: Grafts classified by hair count, kept moist at 2–8 °C
Typical duration: ~1 hour
What happens: Each unit loaded into the implanter lumen and placed at the planned angle, direction and depth
Typical duration: 3–4 hours
What happens: Donor dressed, medication issued, aftercare explained in your own language
Typical duration: 20–30 min
Tip diameter is matched to graft calibre, not chosen once for the whole case. A needle too wide leaves a loose graft and a larger wound; too narrow compresses the follicle on the way in. Several diameters are in use across a single procedure.
Hair shaft thickness is measured at your pre-operative follicle analysis, so tip selection is based on your measured calibre rather than an assumption. Curl pattern also matters: coiled hair curves below the surface and needs a wider lumen for the same hair count.
Depth stoppers are set for each zone. A graft placed too deep risks folliculitis, ingrown hairs and pitting; too shallow, and it dries out or lifts. The working target is for the follicular unit to sit level with the surrounding skin, with the epidermal portion just proud of it.
Typical tip diameter: 0.6–0.7 mm
Where it is used: Frontal hairline leading edge, eyebrows
Typical tip diameter: 0.8 mm
Where it is used: Behind the hairline, temporal points
Typical tip diameter: 0.9 mm
Where it is used: Mid-scalp, frontal zone volume
Typical tip diameter: 1.0 mm and above
Where it is used: Crown, coarse or curly hair
These three parameters decide whether the result reads as hair or as a transplant, and the implanter manages all three in one movement.
A perfectly even hairline is the clearest sign of a poorly designed one. Micro-irregularity along the leading edge and macro-irregularity across the whole line are built in deliberately, because that is how a natural hairline behaves.
Exit angle: 10–15°
Direction: Forward, with deliberate micro-irregularity
Graft type: Single hair only
Exit angle: 20–30°
Direction: Forward and slightly lateral
Graft type: Double and triple
Exit angle: 30–40°
Direction: Follows native flow
Graft type: Double and triple
Exit angle: Follows the whorl
Direction: Radial, spiralling from the whorl centre
Graft type: Mixed
Exit angle: Very acute, near flat
Direction: Downward and backward
Graft type: Single hair, fine calibre
Placing grafts between hairs that are still growing is the situation DHI handles better than any alternative, and it deserves its own explanation.
With pre-made incisions, a blade entering a field of existing hair cannot see what lies beneath the surface; native follicles can be transected without anyone noticing until months later, when the area looks thinner than before surgery. With an implanter, each entry point is chosen under direct vision, between visible shafts, one graft at a time.
Density targets are the same as for any recipient area — 30–40 FU/cm² across the frontal hairline, 30–35 FU/cm² through the mid-scalp, 25–35 FU/cm² at the crown. Where native hair is still present, the transplanted density is planned as a supplement to what is already there rather than a replacement for it, so the combined figure stays within what the blood supply can support.
An important caution about existing hair.
Miniaturising hairs in a thinning zone will continue to thin whether or not grafts are placed between them. If the plan does not account for that, the area can look excellent at twelve months and disappointing at four years. This is why we assess miniaturisation with trichoscopy before agreeing a density, and why long-term medical therapy is discussed at the same consultation.
These are the two genuine technical challenges of implanter placement, and they are worth describing honestly rather than omitting.
Because the incision and the placement happen in the same instant, there is no interval in which a site can be allowed to settle. Control depends on planning rather than reaction: tumescent infiltration to raise tissue turgor, carefully dosed adrenaline for its short vasoconstrictive effect, and segmented placement so that the field is worked in defined blocks rather than scattered across the whole area at once.
Popping is when placing one graft displaces a neighbour already seated. It becomes more likely in elastic scalp tissue, at high densities and with sites placed too close together. It is managed by spacing the placement sequence rather than working strictly line by line, by matching tip diameter accurately to graft calibre, and by setting depth precisely. A displaced graft that is re-seated has been handled twice, and every extra handling reduces its chance of survival.
This section exists because the honest answer is more useful than the marketing one.
| Claim | What the literature supports |
|---|---|
| Implanter placement achieves good long-term growth | Supported. Published implanter series have reported hair-count-based growth of approximately 90% at 12 months. |
| The follicular bulb is not gripped, reducing mechanical trauma | Biologically sound. Graft damage — partial paring, fracture, bulb injury — measurably reduces survival, so avoiding forceps contact with the bulb is rational. |
| DHI produces significantly higher survival than forceps placement | Not established. High-quality comparative evidence is limited. ISHRS technical assessments state the claim cannot currently be made. |
| DHI allows higher density than other methods | Not established. Comparable densities are achievable with pre-made sites. Operator experience matters more than the instrument. |
| DHI reduces bleeding | Not supported. Simultaneous incision and placement makes haemostasis harder, not easier. |
| Site creation technique (hole vs slit, coronal vs sagittal) changes growth | Unclear. A prospective split-scalp comparison found a time advantage for the hole technique without demonstrating a growth advantage. |
The conclusion we draw from this is straightforward: choose the placement technique that suits the case, execute it atraumatically, and do not pay a premium for an instrument.
“Patients often arrive convinced that DHI is a better operation. It is a better instrument for certain jobs — the hairline, working between existing hairs, unshaven cases. For a large crown it is simply slower. Choosing it for every case would be easier to sell and worse for the patient.”
— Dr Mahmut Satekin, Medical Aesthetics Physician, Hair of Istanbul
| Risk | Typical course | How it is reduced |
|---|---|---|
| Forehead swelling | Days 2–5, resolves without treatment | Head elevation, controlled tumescent volume, cold compress to the forehead only |
| Bleeding during placement | Managed intraoperatively | Tumescent planning, adrenaline dosing, segmented placement, anticoagulant review beforehand |
| Popping | Intraoperative | Spaced placement sequence, tip-to-graft matching, depth control |
| Folliculitis | Weeks 4–12, usually self-limiting | Correct placement depth, washing protocol, early review of persistent pustules |
| Ingrown hairs or pitting | Months 2–6 | Avoiding placement below skin level |
| Shock loss of existing hair | Weeks 3–8, usually temporary | Careful spacing between native follicles, atraumatic entry |
| Infection | Uncommon | Sterile chain, single-use implanter tips, aftercare compliance |
Implanter tips are single-use. They are consumables, not instruments to be resharpened, and a blunted tip tears tissue rather than cutting it.
Two things no clinic can promise: a specific density, and a fixed survival figure. Biology varies between patients. What can be committed to is correct indication, accurate parameters and structured follow-up.
Full day-by-day instructions are in our aftercare guide. Follow-up photographs and trichoscopy are taken at months three, six and twelve.
Forehead swelling is common. Sleep on your back with the head elevated. First wash carried out at the clinic.
Crusting forms and clears with the prescribed washing routine. Where the recipient area was left unshaven, crust removal takes more care and longer.
Transplanted hairs shed. Temporary shedding of existing hair in the treated area can also occur and recovers.
Density becomes clearly visible — roughly 60–70% of the final appearance.
The result you should judge.
A DHI hair transplant at Hair of Istanbul costs between €3,500 and €5,000 as an all-inclusive package — the same as any other technique. Pricing is set by graft count. There is no DHI surcharge.
| Graft range | Package | Typical Norwood stage |
|---|---|---|
| Up to 1,500 grafts | €3,500 | I – II |
| 1,500 – 2,500 grafts | €4,000 | II – III |
| 2,500 – 3,500 grafts | €4,500 | IV – V |
| 3,500 – 4,500 grafts | €5,000 | V – VI |
All-inclusive: pre-operative blood tests, ECG and medical review; the procedure using DHI, Sapphire or SLIT as clinically appropriate; medication, one PRP session and aftercare products; accommodation; airport and clinic transfers; first wash, aftercare briefing and follow-up. See the full 2026 price list.
The question compares two different things. FUE is how follicles are removed; DHI is how they are placed. A DHI procedure is an FUE procedure with implanter placement. For hairline detail, unshaven work and densification among existing hair, implanter placement offers real advantages. For broad coverage in a single session it is slower without a demonstrated benefit.
A session of 2,000–3,500 grafts takes 6–8 hours in one day. Harvesting runs 2–3 hours, sorting about an hour, and loading and placement 3–4 hours. Placement is slower than with forceps, which is why DHI sessions are typically smaller than FUE sessions.
Typically 2,000–3,500. Above roughly 3,500 grafts, implanter-only placement extends the day considerably; combining DHI at the hairline with Sapphire FUE behind it usually gives a better result in the same time.
Not at Hair of Istanbul. Pricing is by graft count: €3,500 for up to 1,500 grafts, €4,000 for 1,500–2,500, €4,500 for 2,500–3,500 and €5,000 for 3,500–4,500 grafts; above 4,500 grafts the plan follows a free assessment. There is no surcharge for DHI, Sapphire or SLIT. Clinics that charge more for DHI are charging for an instrument, not a different operation.
The recipient area can stay unshaven, and this is one of the main reasons DHI is chosen. The donor area usually needs shaving, though a concealed partial shave is possible. Fully unshaven procedures are practical up to roughly 1,500 grafts; partially shaved up to roughly 2,500–3,000.
Comparable density is achievable with pre-made sites. Published evidence does not establish a density advantage for implanters. Target densities are the same either way: 30–40 FU/cm² across the frontal hairline, 30–35 FU/cm² through the mid-scalp.
The biological rationale is sound — the follicular bulb is never gripped, and graft damage is known to reduce survival. But high-quality comparative studies showing a survival advantage over careful forceps placement are limited. ISHRS assessments state that the claim cannot currently be made.
Published implanter series have reported hair-count-based growth of approximately 90% at 12 months. Results vary with hair type, skin biomechanics and protocol, and no clinic can promise a specific figure for an individual patient.
No. Both are performed under local anaesthesia with a specialist anaesthesiologist present throughout. The anaesthetic injections are felt; after that most patients describe pressure and movement rather than pain.
Between 0.6 and 1.0 mm and above, matched to graft calibre: 0.6–0.7 mm for fine single-hair grafts at the hairline, 0.8 mm behind it, 0.9 mm for double and triple units in the mid-scalp, 1.0 mm and above for thick or curly grafts. Your hair shaft thickness is measured before the procedure, so selection is based on measurement rather than assumption.
Yes, and the whorl pattern is one of the harder things to reproduce, so precise direction control helps. But the crown is usually a large area, and implanter-only placement over a large area is slow. Most crown plans combine methods.
Yes — brow restoration is one of the clearest indications. It requires single-hair grafts throughout and very acute angles of roughly 5–15° to the skin, which is exactly what an implanter controls well.
The risk of transecting native follicles is lower than with pre-made incisions, because each entry point is chosen under direct vision between visible hairs. Temporary shock loss of existing hair can still occur at weeks three to eight and generally recovers.
Popping is when placing one graft displaces a neighbouring graft already seated. It is an intraoperative issue managed by spacing the placement sequence, matching tip diameter to graft calibre and controlling depth. It is not something you need to do anything about afterwards.
That is decided after your donor analysis and hairline design, based on the area to be covered, your hair calibre and curl, whether native hair is present in the target zone, and whether shaving is acceptable to you. Most plans combine techniques. The choice does not change your price.
Medically reviewed by Dr Mahmut Satekin, Medical Aesthetics Physician at Hair of Istanbul. Last reviewed August 2026. This page is general information about a medical procedure and does not replace individual assessment. Suitability, technique and expected outcome are determined after examination.
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