Hair Transplant Encyclopedia

Density is what is placed; coverage is what is seen. They are not the same measurement and they do not move together. Coverage depends on...

The dermal papilla is the follicle’s instruction set, not part of the hair. It is a small cluster of specialised cells sitting in a cup...

DHT is not the problem; sensitivity to it is. Dihydrotestosterone is a normal androgen present in everyone. Most men losing hair have entirely ordinary levels...

Diffuse thinning describes what is seen, not what is happening. It means hair density falling evenly across the scalp instead of receding along a front....

DUPA is the diagnosis that removes the donor area. In ordinary pattern loss the back and sides are spared, which is what makes surgery possible....

Donor dominance is the principle the whole procedure rests on: a follicle keeps the characteristics of the site it came from, not the site it...

Depletion is an arithmetic problem, not an accident. The donor area holds a fixed number of follicular units, and every extraction permanently removes one. Nothing...

The limit is a proportion, not a graft number. Follicular unit extraction takes units scattered across a zone, and the hairs left behind have to...

Extraction is measured by one number: transection. A follicular unit sits at an angle under the skin and curves as it goes. The punch travels...

FUT means follicular unit transplantation, and its defining act is the strip. A narrow horizontal band of skin is taken from the back of the...

The two techniques differ at one step only. FUT removes a strip of donor skin and separates the follicular units from it on a bench....

The visible hair misleads. A hair shaft leaves the skin at one angle, but the follicle beneath it does not run in a straight line...