DHI hair transplant Turkey: how the Choi implanter pen works, when DHI outperforms FUE and why precision placement produces the most natural hairlines.
How DHI works — the Choi pen technique
DHI (Direct Hair Implantation) uses a Choi implanter pen — a hollow-needle device loaded with a single extracted follicle. Unlike FUE where channels are pre-created with a blade before graft insertion, DHI creates the recipient channel and places the graft simultaneously in a single motion. The surgeon controls angle, direction and depth entirely through pen positioning.
This single-step approach produces two advantages: it eliminates the time gap between channel creation and implantation (reducing risk of channel collapse or contamination); and it provides the surgeon direct, continuous control over the angle of every placed graft.
When DHI is the preferred technique
| Scenario | Best technique | Why |
|---|---|---|
| Thinning zone with existing hair | DHI | No pre-channels — no risk to adjacent follicles |
| Unshaved / no-shave procedure | DHI | Designed for placement between existing hair |
| High-density hairline | DHI | Superior angle precision at leading edge |
| Women with diffuse thinning | DHI | Preserves all existing hair |
| Large session 4,000+ grafts | FUE | Faster at scale |
| Fully bald zone | Either equally | No existing follicles to protect |
DHI results — what patients experience
DHI results at Hairmedico match FUE results in density and naturalness — the technique choice does not affect the final outcome quality, it determines which technical approach is optimal for the specific case. Growth timeline is identical: shock loss weeks 2–5, new growth from months 3–5, 80% density by month 9, final result months 12–14. The DHI advantage is most visible in the hairline naturalness and in the preservation of existing hair in thinning zones.
