FUE comparison: sapphire, DHI or manual implantation, which one to choose

Summary

People talk about FUE as if it were a single technique. It is a family. Under one acronym sit several ways of harvesting grafts, opening the channels that will receive them and putting them in place, and those choices do not produce the same outcome on the same head.

This comparison takes the three stages one at a time, because that is where clinics genuinely differ. Most of the rest comes down to marketing vocabulary.

What an FUE comparison should actually compare

Infographic showing side by side the five stages of hair loss in a woman and in a man, from a full head of hair to established baldness, captioned female cycle, male cycle and hair loss alopecia

Before choosing a tool, you need to know what is being treated. The vast majority of hair transplants answer androgenetic alopecia, the gradual thinning caused by an inherited sensitivity of the follicles to hormones. It moves in steps, mapped in men by the Norwood scale.

The stage reached, the surface to be covered and the condition of the donor area dictate everything that follows. An FUE variant that suits a receding temple is not necessarily the one to use on established baldness.

The shared foundation: FUE

Split view of a surgical team wearing loupes working on a shaved scalp marked with violet ink, next to a Petri dish where grafts are lined up in tight rows on gauze

FUE, short for Follicular Unit Extraction, harvests follicular units one by one. A follicular unit is the natural cluster of one to four hairs that grows together. The practitioner outlines each of them with a cylindrical punch less than a millimetre across, lifts it out, then keeps it chilled until implantation.

Every variant shares that foundation. What separates them comes afterwards.

Harvesting: manual punch, motorised or robotic

Four combined views of robotic hair transplant systems, including an ARTAS arm positioned above a patient's head and an articulated console operated by a technician

The punch can be held in the hand or mounted on a motor. Robotic systems go further: the ARTAS arm locates follicles by camera and drills in the operator’s place, while suction consoles of the NeoGraft type harvest and draw up the graft in one movement.

Speed is the selling point. The trade-off lies in selection: an algorithm takes whatever its sensor recognises, whereas an experienced surgeon takes what they have decided to take. On light, curly or very fine hair, the gap widens. The type of hair counts for as much here as the equipment, and that holds just as true for afro and curly hair.

Opening the channels, the stage everyone forgets

Between harvesting and implantation sits a phase few patients have heard of: creating the recipient sites. The practitioner opens thousands of micro-channels across the thinning area, deciding for each one its angle, its depth and its direction. This is what will make the result look natural, or not.

The steel blade

A practitioner in surgical scrubs leaning over the frontal hairline of a patient lying down, a slim instrument held between thumb and index finger

This is the historic method. A flat steel blade with a rectangular cross-section. It works, but it dulls over the course of thousands of incisions and opens channels wider than they need to be. A channel that is too wide means a graft that shifts and a wound that takes longer to close.

The sapphire blade

Close-up of the V-shaped bevelled tip of a sapphire blade held above an already incised scalp, beside a blade holder guided by a gloved hand

The sapphire blade is cut from a synthetic crystal and ends in a V-shaped point. It stays sharp far longer and cuts a narrower channel, with a triangular cross-section.

That is more than a brochure line. Ahmad and Ismail (2021) measured the wound surface created by different blade geometries according to their angle of entry. The sapphire blade at 30 degrees produced the smallest injury, the rectangular blade the largest. And the shallower the angle of entry, the less the tissue suffers. An almost grazing incision damages noticeably less than a perpendicular one.

Implantation: forceps or implanter pen

FUE with manual implantation

Split view of a surgeon wearing a headband loupe working on a scalp marked with ink, next to fine forceps placing a graft on an already densely implanted recipient area

Here the channels are opened first and the grafts placed afterwards, one at a time, with forceps. The pace is slow. It gives the practitioner full control over local density: they can see the channels, and they choose which ones to fill first and with which type of graft.

It is the approach kept for large surfaces, where a limited number of grafts has to be shared out intelligently. Manual FUE calls for a well-drilled team and stretches the operating day.

DHI and the Choi pen

Two gold-coloured implanter pens held above a shaved scalp during graft placement, handled by two masked practitioners

DHI uses an implanter pen, known as the Choi pen, into which the graft is loaded before being pushed into the skin. Incision and placement happen in one movement. The graft therefore spends less time outside the body, and the angle is set at the very moment of insertion.

Macro photograph of a scalp showing freshly implanted grafts sitting between existing hairs, with no shaving of the recipient area

The second advantage is often the decisive one: grafts can be placed between hairs that are still there. That makes an unshaven procedure possible on the recipient area, and it thickens hair that is thinning without starting from scratch. The trade-off is time, since each pen has to be reloaded graft after graft.

Plenty of cases do not settle the question either way. A hybrid FUE and DHI approach keeps the pen for the frontal hairline and the forceps for the rest of the scalp.

What the studies say about these tools

The literature is more cautious than the sales pitch. von Albertini and von Albertini (2017) asked the question directly, whether implanters damage grafts during loading and placement: the available data remained limited, and the operator’s handling weighed more than the instrument itself.

Bansal and colleagues (2019) followed 104 patients implanted with a pen into sites opened beforehand. Regrowth became visible between two and five months, and the improvement in baldness score was clear in close to seven patients out of ten. Their conclusion is about handling: the less a graft is touched, the better it survives. The authors point out themselves that no objective measurement of regrowth was carried out, which invites us to take those percentages for what they are, a clinical assessment rather than a count.

Kasai and co-authors (2023) compared two ways of opening recipient sites on the same patients, the slit and the round hole. The hole was significantly faster, with better visibility of the sites already made. Nothing spectacular, but it shows how much these small technical choices shape the operating day.

FUE and FUT: the comparison that still earns its place

Infographic setting the four steps of FUT, from taking a strip of skin to inserting the grafts, against the four steps of FUE, from the incision around the follicles to the implantation of the grafts

Every variant discussed so far is a form of FUE. Facing them, FUT removes a whole strip of scalp, closed afterwards with sutures.

Comparison of two shaved napes, on the left a continuous horizontal scar line, on the right scattered extraction points that are barely visible

The difference leaps out on the donor area: a single continuous line on one side, a dusting of dots on the other. That is what tipped practice over, and why current hair transplant techniques have all been built around unit-by-unit harvesting.

How the technique is really decided

Dr Cinik in a white coat examining a patient's scalp with a handheld analysis device

No variant is superior in absolute terms. The decision comes after examining the scalp, measuring donor density and talking through what the patient genuinely wants to achieve. A man of 28 whose hair loss is still progressing will not be given the same plan as a stabilised man of 50.

Hold on to two markers. Opening the channels with a sapphire blade limits the trauma to the skin, and there are figures behind that. And the choice between forceps and implanter pen depends above all on the surface to be treated and on whether there is hair worth keeping on the recipient area. The rest belongs to the team performing the surgery, which explains why procedures cluster in a handful of centres specialised in hair transplant Turkey.

Sources

Ahmad, M., & Ismail, M. (2021). Effect of different shapes of recipient site creation micro-blades at varying angles and wound injury. Journal of Cosmetic Dermatology, 20(11), 3610-3615. https://doi.org/10.1111/jocd.14006

Bansal, A., Sethi, P., Kumar, A., Sahoo, A. K., & Das, P. (2019). Use of implanters in premade recipient sites for hair transplantation. Journal of Cutaneous and Aesthetic Surgery, 12(4), 250-254. https://doi.org/10.4103/JCAS.JCAS_33_19

Kasai, Y., Tsushima, A., & Abe, N. (2023). Recipient site creation for hair transplantation: a prospective half-side comparison study of hole versus slit. JPRAS Open, 37, 52-54. https://doi.org/10.1016/j.jpra.2023.06.002

von Albertini, C., & von Albertini, M.-A. (2017). Does the use of implanters affect the quality of FUE grafts? Hair Transplant Forum International, 27(3), 96-99. https://doi.org/10.33589/27.3.0096