Donor and Recipient Follicular Units

Grafts or follicular unit density applies to the donor and recipient areas; donor hair density has a large part to play with the suitability of a hair transplant candidate. Recipient density reflects on how natural the result will look

With a hair transplant the result works by illusion of density, blocking the light reflection off the head, the more the reflection can be blocked the greater the look of thickness is achieved

Hairs grow in natural groupings called follicular units; there are generally one to four hairs per follicular unit and dependent on the area to be treated will be strategically placed in the recipient area to give the best cosmetic impact

Hair density in the donor and recipient areas is generally measured per cm²; the density around the sides and back varies, with a slightly lower hair density around the sides and a higher density around the back

Average donor hair density is considered around 75 FUcm², it can rise to over 100 FUcm² and can drop to as low as below 50 FUcm². Donor hair density can also be linked to the hair characteristics and ethnicity of the individual

Aspects such as hair colour, hair calibre, curly or straight hair can all impact on the density of hair around the donor area safe zone

Hair density placement is a vital component to a successful hair transplant, it is important that whatever the area is that needs to be treated it is completed in one pass with the required density; it is not ideal to have to go back into the same area

The exception to this is when rebuilding a higher Norwood scale hair loss sufferer and total restoration in one procedure is not possible. Then the density placed will drop going back over the head to not leave a flat hard line

Single hair follicular units (FU´s) require a greater number to be placed to create this illusion of thickness, dependent on the hair characteristics possibly from 40-70 FU´s per cm². Hair line work requires the use of single hair follicular units directly on the hair line to give a soft, natural look, not a hard wall of hair

Behind the hair line the multiple hair units are placed to help gain the fullness of the result. Hair characteristics play an important role in the number of grafts required to be placed per cm²; fine, wispy hair gives little coverage whereas coarse wavy hair gives a much greater illusion of thickness

Multiple hair units can reduce the density placed due to more hairs per follicular unit; the density placed could be 30% less but actually give more hairs in the area, allowing for greater distribution of the follicular units, meaning more coverage being achieved

Placing a high density is a skill, creating the slits for the graft to be placed in such a small area needs precision tools; at Hattingen Hair use custom-made blades, to alter the size of the slit dependent on the graft size placed

Being able to vary the slit size also allows for a greater density and speedier healing at high density; a skill required on small or large procedures, but especially larger procedures having to cover a wider surface area

The density required has many variables and needs to be discussed with the doctor to ensure an understanding is there as to why a certain density is required; this will help to understand why a certain number of grafts are required and what coverage can be achieved



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