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RO The term comes from strip surgery, where dissection is the whole job. A removed strip is first cut into thin slivers, then separated under a stereomicroscope into individual follicular units. Without magnification the blade cannot see where one unit ends and the next begins, and every misjudged cut destroys follicles that were harvested intact.
In follicular unit extraction the work changes shape but does not disappear. Grafts arrive already separated, so magnification is used instead to trim surplus tissue, discard transected units, and sort grafts by how many hairs each carries — singles for the hairline, larger units for bulk. A graft that is never inspected is placed blind.
| Stage | What magnification prevents |
|---|---|
| Slivering and dissection | Cutting through follicles inside the tissue |
| Trimming | Stripping tissue the follicle needs, or leaving too much |
| Sorting | Coarse multi-hair grafts reaching the hairline |
Its true cost is time and people. Dissection is bench work, measured in trained hands and hours, and it produces nothing a patient can photograph. That makes it the quietest thing to cut in a high-volume operation, and one of the least visible reasons two procedures with identical graft counts do not give identical results.
Related terms
- Graft handling and storage
- FUT vs FUE
- Graft vs hair count
- FUE extraction science
- Hair follicle anatomy
For how grafts are obtained before they reach the bench, see the FUE technique. For what determines how many of them grow, see hair transplant success rate.
