GetHair Logo

DHI vs FUE: what is the difference, and does it matter?

In short: DHI is a variation of FUE that changes only how the grafts are placed. Both remove follicles one at a time from the donor area in the same way. DHI then inserts each graft with a pen-like implanter, often making the opening in the same movement, while standard FUE makes the openings first and places grafts with fine forceps. A published commentary on the technique says its benefit over standard FUE has not been proven.

In the DHI vs FUE comparison, both take hair from the donor area in the same way and differ only in how the grafts go back in. DHI (direct hair implantation) places each graft with a pen-shaped implanter, while standard FUE makes small openings in the thinning area first and then inserts the grafts with fine forceps.

That makes the FUE vs DHI choice narrower than it first looks. The International Society of Hair Restoration Surgery (ISHRS) treats DHI as an implantation technique rather than a separate transplant method.

What is FUE?

FUE stands for follicular unit excision. The ISHRS describes it as removing individual follicular units, the natural clusters of one to four hairs, with micro punches between 0.7 and 1.2 mm wide. The NHS hair transplant page puts it more plainly: hairs are removed one by one, which leaves lots of tiny scars that are not very noticeable.

You may also see it called follicular unit "extraction". The ISHRS formally changed the name to "excision" because "extraction" sounded non-surgical and had fed a belief that lay people could perform it. It is the same procedure.

After harvesting, the grafts go into small openings in the thinning area. The ISHRS says some surgeons make these recipient sites before harvesting and others harvest first, and that the grafts are most often placed by trained staff. For a fuller walk-through of the whole procedure, see our guide to what an FUE hair transplant involves.

What is DHI?

DHI is FUE with a different placement tool. A 2013 commentary in the Journal of Cutaneous and Aesthetic Surgery by Venkataram Mysore describes direct implantation as an FUE technique, so the donor hair is removed with the same punch. The grafts are then loaded into an implanter, a hollow needle in a pen-shaped handle, and pushed into the scalp.

There are two kinds of implanter. The ISHRS explains in its piece on why FUE is so confusing that sharp implanters make the incision and implant the graft in one movement, while dull implanters insert grafts into openings that were made beforehand. It calls DHI another name for the implantation technique, and its 2019 terminology guide credits Choi with first describing sharp needle implanters, in 1992.

The ISHRS says DHI is not a hair transplant method and should not be marketed as one, and it advises patients to be wary of clinics that give the most common type of hair transplant a new brand name.

How do DHI and FUE compare?

Most of what a patient experiences is the same, because the harvest is the same.

Standard FUE DHI
How donor hair is removed Individual units cut out with a small punch The same
How grafts go in Openings made first, grafts placed with fine forceps Implanter pen, often making the opening and placing the graft in one step
Handling of each graft Gripped with forceps during placement Less gripping, because the graft sits inside the needle
Donor scarring Many tiny dot scars, usually not very noticeable The same, because the harvest is the same
Evidence that it grows more hair Not established either way (Mysore, 2013) Not established either way (Mysore, 2013)

The case for implanters rests on that handling row. A 2019 paper in the Journal of Cutaneous and Aesthetic Surgery by Bansal and colleagues says implanters reduce handling of the graft to a minimum and prevent most crushing of FUE grafts during placement. The same paper notes that sharp implanter needles lose their edge, have to be replaced often, and have been associated with grafts popping back out.

Does DHI give better results than FUE?

The published evidence does not settle it. Bansal and colleagues state that they did not compare results between implantation techniques, and Mysore wrote that the benefit of direct implantation had not been proven and called for a study comparing both methods on the same scalp.

The case made for DHI rests on two ideas: less handling of each graft, and less time between removal and placement. The second idea has some basis. Mysore notes that, in FUE, grafts may sit outside the body for several hours, and cites studies finding that the longer a graft waits, the greater the graft loss.

Other things shape the result too: how much donor hair you have, how carefully it is harvested, the angle and direction each graft is placed at, and who does each part of the work. The ISHRS says FUE should be physician-driven, with the doctor obliged to perform the harvesting.

Which technique will the clinic suggest?

That is the clinic’s call after it has examined your scalp. Several things vary from person to person and shape the plan. The NHS notes that a large area may need two or more sessions on different days. The ISHRS points out that donor hair, once removed, is gone for good, so how much you have limits what can be done.

A clinic that can explain why it recommends one method for your scalp is more useful to you than one that sells a branded technique on its name.

On shaving, the ISHRS says FUE is usually done with a shaved donor area. Unshaven FUE is possible in some cases, but it takes longer and usually costs more. Ask the clinic what it plans for you rather than assuming either technique avoids a shave. For how package prices are put together, see our hair transplant cost guide.

What does recovery look like?

The NHS and ISHRS recovery guidance is written for FUE. Because the ISHRS treats DHI as an implantation technique, that guidance applies to both. The NHS says you may need one to two weeks off work, should expect a tight, achy and swollen scalp for a few days, and may be told to cut down on exercise in the first month to reduce scarring.

The ISHRS says tiny scabs form and are usually gone within one to two weeks. The NHS timeline for growth is the same for both:

Risks and what can go wrong

The risks below apply to DHI as well as standard FUE, because the harvest, which the ISHRS links to the greatest risks, is the same in both.

The NHS says a hair transplant is generally safe, but, as with any operation, there is a small risk of bleeding, infection and an allergic reaction to the anaesthetic. The ISHRS lists scalp cysts, mild infections and temporary shedding of hair (telogen effluvium, often called shock loss) among the possible side effects.

Two risks deserve more weight:

Poor growth is also possible. Bansal and colleagues note that grafts can be crushed while being placed, and that implanter needles that have lost their edge have been linked to grafts popping out and graft loss.

Having the operation abroad adds its own risks: you are far from the team if a problem appears once you are home. The NHS has guidance on going abroad for treatment, and the British Association of Hair Restoration Surgery publishes advice for patients considering surgery abroad. Both are worth reading before you book.

Questions to ask the clinic

Most of these come from the BAHRS patient advice and the ISHRS points above.

Talk it through

If you are weighing DHI against FUE and want a clinic to look at your own hair, GetHair can arrange a free consultation with a partner clinic in Turkey. The clinic assesses your scalp and recommends a technique, and you decide in your own time.

Sources