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Kinds of grafts
A very important factor in the future aesthetic and natural look of the end result in the receptor area is the kind of grafts used.
Important remark:
The word "graft" is a universal term, which may be applied to connote FU's,
minigrafts, micrografts or those grafts used for the punch and plug methods. Thus, a FU can also be defined as a graft (just like the way we are using the term in our own website), although, in other cases, the word graft does not necessarily mean FU. Therefore, it is up to the prospective customer to inquire from the institute of his choice, what kind of grafts is transplanted.

Punch- Grafts / Plug- Grafts:

Up to the 1980's, very big grafts with a diameter of up to 4 mm were often transplanted using the punch method. Such method led to the unnatural looking "islet effect" (please refer to: Historical development of HT).

Minigrafts and Micrografts:

The piece of scalp taken out for transplant purposes is then sliced into small pieces composing of 1, 2 or 3 hairs (micrografts) and 4, 5, 6 or more hairs (minigrafts). These grafts are then transplanted into receptor areas. The aesthetic level reached by this kind of transplant is much better than that of the punch/ plug grafts. However, one can readily recognize that minigrafts and micrografts do not correspond to the natural hair distribution. Up to the end of the 1990's it was usually practiced. Even today, there are still some institutions which employ this method. 

FUs (follicular units):

At the end of the 1980's and beginning of the 1990's it became clear to hair surgeons that scalp hair grows naturally in small groups, which we call as "follicular units". These units are composed either of 1, 2 or 3 (very rarely, 4) hair follicles located immediately adjacent to each other. It has been proven that the use of these naturally small units as grafts greatly exceeds the aesthetic results of the rougher minigrafts and micrografts. No wonder, all modern institutes of today use FU's.
Depending on the number of hair follicles, housed by a FU, we differentiate "single FU“ (= 1 hair), "double FU" (= 2 hairs) or " triple FU" (= 3 hairs). 

 Zwei frisch extrahierte double- FU's
Two freshly extracted double- FU's in a FUE- session, done at our practice
During a FUE hair transplant, follicular units are obviously taken from the donor area. When it comes to other extraction methods, it depends on the institute to decide into what kind of grafts the sliced skin flap will be divided.