One extraction, three ways to implant
FUE, Sapphire FUE and DHI are not three different operations. In all three, grafts are taken one by one from the donor area at the back and sides of the head - that is what FUE (follicular unit extraction) means. The difference is what happens next: how the channels that receive the grafts are opened, and how the grafts are placed in them. That difference decides how much of the head needs shaving, how large an area can be covered in one session, and which patients each technique suits.
Classic FUE
In classic FUE the surgeon first opens the receiving channels with fine steel blades, then places the extracted grafts into them. Compared with the older strip method (FUT), it leaves small dots instead of a linear scar, and recovery is usually 7 to 10 days rather than several weeks.
Sapphire FUE
Sapphire FUE works the same way, but the channels are opened with blades made of synthetic sapphire. They make fine V-shaped incisions with less trauma to the surrounding tissue, which allows grafts to be placed closely and supports quick healing, usually within 7 to 10 days. Because the channels are opened across the whole area before implantation, Sapphire FUE suits large areas and high graft numbers - up to about 5,000 grafts in a session - and the head is usually shaved completely.
DHI
In DHI (direct hair implantation) the channel is opened and the graft placed in the same movement, with a Choi implanter pen. Because each graft goes straight into its place, there is no separate channel-opening stage and the recipient area often does not need to be shaved - frequently only the donor area is. DHI suits dense work in smaller or defined areas, thinning hair and patients who want to avoid shaving, with around 3,500 grafts in a session. It is not suitable for Afro-textured hair: curved grafts are difficult to load into the pen without damage, so an Afro hair transplant is usually done with Sapphire or manual techniques.
Side by side
| Feature | Classic FUE | Sapphire FUE | DHI |
|---|---|---|---|
| Channel opening | Steel blade, then placement | Sapphire blade, then placement | One step with the Choi pen |
| Incision | Traditional U-shape | Fine V-shape | Circular needle |
| Best for | General restoration | Large areas, high density | Smaller areas, thinning hair, no shave |
| Shaving | Usually the whole head | Usually the whole head | Often only the donor area |
| Grafts per session | - | Up to about 5,000 | About 3,500 |
| Usual recovery | 7-10 days | 7-10 days | 7-10 days |
Which technique suits whom
The choice follows the hair loss, not the other way round. Extensive loss at the higher stages of the Norwood scale needs many grafts over a large area, which is where Sapphire FUE is strongest. Thinning at the front or crown, a hairline refinement, or a patient who cannot take time off with a shaved head points towards DHI - which is also why it is often chosen for women's hair transplants. Some patients have both techniques in one plan: Sapphire FUE for the large areas and DHI where density matters most.
What does not change with the technique
Whichever technique is used, the number of grafts available is set by the donor area, not by the method; the operation is done under local anaesthesia after blood tests and a hairline design; and the growth timeline is the same - the transplanted hairs shed in the first weeks and new growth starts over the following months (see what to expect 2 months after a hair transplant). How many grafts you might need can be estimated with the graft calculator, and prices by technique are on the cost page.
FAQs about FUE, DHI and Sapphire FUE
Is DHI better than Sapphire FUE?
Neither is better in general. DHI places grafts in one step with a Choi pen and often avoids shaving the recipient area, which suits dense work in smaller areas. Sapphire FUE covers larger areas and more grafts in a session. The right one depends on the extent of the hair loss and the look you want.
Do I need to shave my head for DHI?
Often only the donor area is shaved for DHI, because the grafts are placed directly without opening channels across the recipient area first. With classic FUE and Sapphire FUE the head is usually shaved completely.
How many grafts can be transplanted in one session?
Up to about 5,000 grafts with Sapphire FUE and around 3,500 with DHI. The real limit for each patient is how many grafts the donor area can safely give.
Is recovery different between the techniques?
Recovery is usually 7 to 10 days with all three. The hair growth timeline afterwards is the same.
Which technique is used for Afro hair?
DHI is not suitable for Afro-textured hair because the curved grafts are difficult to load into the implanter pen. Afro hair transplants are usually done with Sapphire or manual techniques.