Here you can find an alphabetically sorted list of some common and specialist terms of the field of hair transplants as well as their explanation.


Allogenic hair transplants

The allogenic hair transplantation describe the (theoretically possible) transplantation of living human hair follicles to another human being.  As the biological tissue of the donor is not identically with the biological tissue of the recipient, the transplanted hair follicles will be rejected from the body 2 to 4 weeks after the transplantation.

Alopecia androgenetica

The term describes a visible thinning of the head hair and also a state of unusually thin main hair (hypotrichosis) or with areas of the skin which have no hair at all. Alopecia is caused by several reasons and has different appearances. Depending on the reasons for alopecia, there are different types for it.

The most common types are:

  1. Androgenic alopecia / alopecia androgenetica
    genetically loss of hair, which is hereditary.
  2. Alopecia areata / circular loss of hair
    is a round, localized abnormal loss of hair.
  3. Diffuse alopecia / diffuse loss of hair / telogen effluvium
    is a diffuse loss of hair all over the head. This type of hair loss is more represented by women than men.
Autologous hair transplants

Autologous hair transplants contain the transplantation of body own hair follicles / hair of a patient to another area of the same patient. As the biological tissue of the donor is identically to the biological tissue of the recipient, it will be successfully accepted from the body. As a result, the transplanted hair can keep on growing at another position.



After the hair transplantation on strip technique method, tension forces have an impact on the sewed or stapled scar, which, as a consequence of this procedure, increasingly grows and becomes even wider.

<strong></strong>Increasing scar after a FUT-hair transplantation / back stretch effect

Image: Increasing scar after a FUT-hair transplantation / back stretch effect



Hair follicles which are not located at the head, like hair from the chest, legs, armpits, back.

Bodygraft transplantation

The bodygraft transplantation means, that hair will be extracted from the body through I-FUE or FUE-extraction technology and transplanted to the scalp. 
In the Centre for modern hair transplants, bodygrafts will be transplanted to patients who have already undergone several hair transplants through outdated methods (like the strip technique / FUT and punch technique) or inappropriate treatment and aggressive FUE-method, (often found for “low-cost-transplantations“ in cheaper foreign countries) and consequently only have less hair at the back of their head. The best hair for bodygraft transplantation is hair from the back or chest. They achieve a high rate of taking roots and match with the native hair of the head optically and structrually. This means they will get the same length like the native hair in the scalp.


Dihydrotestosterone / DHT

DHT is a abbreviation for  “dihydrotestosterone“, a male sex hormone which is responsible for the genetically determined loss of hair for men.
DHT attacks the root of a hair, so that the phase of growth is shortened and its resting stage increases. The root of the hair wastes away and the hair gets thinner and shorter until the root of the hair finally dies. This is what we call miniaturization of the hair.
The hair at the back of the head and in the neck area is immune to the DHT-hormone. These healthy hair follicles will be extracted during the hair transplantation procedure and transplanted to the areas which have been affected by hair loss. The transplanted hair keeps its healthy characteristics, including the DHT-resistance and are therefore able to keep on growing healthy in other areas.


The donor-area is the area where the hair follicles which are meant to get transplanted, are extracted from. Most of the time it is the area of the back of the head or temples or body (chest, beard, legs, too. Hair follicles from those areas are immune against androgenetic alopecia.


Follicular unit / FU

FU is an abbreviation for “follicular unit“. The follicular unit is a naturally group of hair follicles, containing of 1 to maximum 5 hairs which grow directly located next to each other. Since the complete follicular unit shall be used for the hair transplantation, more than only one hair arise from one follicular unit.

FUE hair transplants

FUE stands for "Follicle Unit Extraction", a scalpel-free and therefore scar-free extraction technology for hair transplants. The donor hair gets extracted separately by using a special micro hypodermic needle and separately transplanted to the bald areas. The optimized and improved form is the so called I-FUE method, developed by Azar.

FUT / Strip-technique

The term strip-technique describes the method of hair transplants, which uses a scalpel in order to excise a spindle-shaped skin flap from the scalp. This excised flap will finally divided into single grafts / donor hair. This method causes an optical ugly and painful scar for most of the patients.

We strictly dissociate from this method!

Skin flap FUT/ strip technique

Image above: Skin flap FUT/ strip technique


Stapled wound after<strong> </strong>FUT / strip method treatment

Image above: Stapled wound after FUT / strip method treatment


Scar after a FUT/ strip method treatment

Bild oben: Scar after a FUT/ strip method treatment


Graft / transplants

Grafts / transplants are follicular units, extracted during the hair transplantation.


Hair transplants

Hair transplants contain a reallocation of healthy, existing roots of the hair within an individual. Methods of hair transplants can be separated into two groups:

  1. Scar-associated hair transplants like the strip technique / FUT or the punch technique.
  2. Scar-free methods for hair transplants, like the FUE or rather I-FUE method for hair transplants.

The hairline is the transition between the hairless forehead and the head hair (forehead-hair-border). The hairline is the frame of the face. It is inherited and differs from human to human. The height and the form of the hairline has a high influence on the outer appearance of a person and therefore have an important aesthetic meaning for the hair transplantation.


Through the Hamilton-Norwood-scale, the androgenetic loss of hair (alopecia androgenetica) of men can be divided into different levels. The hair state or rather state of hair loss gets divided into seven levels (I to VII), which documents the different levels of androgenetic loss of hair. The Hamilton-Norwood-scale therefore allows a standardized medical documentation of hair loss.


I-FUE hair transplants

I-FUE stands for "Intermittent Follicle Unit Extraction", which is an optimized and improved form of the classical FUE hair transplantation, developed by the hair surgeon Azar. The growing yield of the transplanted donor hair on I-FUE method is obviously higher than the growing yield for the FUE-method. This is due to the shorter periods for storage of the hair follicles outside the body.


Recipient area

The recipient area is area which have been affected by the loss of hair and meant to get hair transplanted.

Repair work

Repair work are corrective check-ups after inadequate or failed previous treatments. The goal is a improvement. The Centre for modern hair transplants is specialized in corrective treatments and therefore able to adjust and improve previous mistakes (of other doctors).



Shock-loss describes the loss of hair due to a trauma through external damage of the skin, e.g. by rough instruments or cuts of the scalpel or arterial undersupply of the hair follicles, caused by inappropriate usage of anaesthetics.
During the extraction of the transplants, the skin and the circumjacent hair follicles can be damaged, so that the result is a loss of hair due to a trauma which can be temporary or permanent. This can handicap the transplant yield or even make it impossible.

Storage period of the transplants

The temporally interval between the extraction and its transplantation to the transplantation area is called storage period.


Transection rate / transection

The transection rate describes the relation of damaged or destroyed hair follicles, due to the extraction method. An incorrect extraction results in an increasing transection rate – also  “rate of destruction or damage“.