FUE vs DHI: the definitive guide
The choice between FUE and DHI is one of the most frequent questions during the initial consultation. Both techniques extract individual follicles, but they differ in how they are implanted.
What is FUE (Follicular Unit Extraction)
FUE is the most widely used technique worldwide. The surgeon extracts individual follicles from the donor area (usually the back of the head) using a micrometric punch of 0.7-1.0 mm, and implants them in the recipient area through pre-made micro-incisions.
Process:
- Individual follicle extraction with punch
- Graft classification and preparation
- Micro-incision creation in recipient area
- Manual implantation of each graft
What is DHI (Direct Hair Implantation)
DHI uses a special instrument called an implanter pen (or Choi pen) that allows extracting and implanting the follicle in a single step, without the need for prior incisions.
Process:
- Individual follicle extraction with punch
- Loading the follicle into the implanter pen
- Direct implantation (without prior incision)
Detailed comparison
| Aspect | FUE | DHI |
|---|---|---|
| Time outside body | 30-90 min | 5-15 min |
| Achievable density | High | Very high |
| Direction control | Good | Excellent |
| Maximum session | 4,000-5,000 grafts | 2,500-3,500 grafts |
| Shaving required | Yes (donor area) | Partial possible |
| Recovery | 7-10 days | 5-7 days |
| Price per graft | 3-5 EUR | 4-7 EUR |
| Learning curve | Medium | High |
When to choose FUE
- Large procedures (>3,500 grafts)
- Tighter budget
- Wide recipient area (crown, vertex)
- First intervention
When to choose DHI
- Frontal area and hairline
- Need for maximum density
- Does not want to fully shave
- Density reinforcement in previously transplanted area
The importance of digital planning
Regardless of the technique, prior digital planning is what makes the difference between a good result and an exceptional one.
With tools like TrichoSuite, the surgeon can:
- Map the donor area in 3D to estimate available grafts
- Simulate the expected result with AI
- Calculate optimal distribution per zone
- Generate a detailed report for the patient
Conclusion
There is no universally better technique. The choice depends on the specific case, the area to be treated, the budget, and patient expectations. What matters is that the surgeon masters the chosen technique and has the right tools for precise planning.