Donor Hair Density

 

The density of hair in the donor area is a crucial aspect as to how good a hair transplant candidate actually is; the donor area covers the back and each side of the head and ranges in size dependent on the technique utilised, FUT or FUE

Donor Hair Density Of Follicular Units Per cm²

Donor Hair Density Of Follicular Units Per cm²

The density of hair is measured per follicular unit, each follicular unit can range in size from on average 1 to 4 hairs per grouping, with an average of around 2.2 hairs per follicular unit and the calculation measured per cm²

The donor hair density will alter dependent on the area of the scalp, around the back a higher density of follicular units compared to the sides; also the average number of hairs per FU will drop around the sides compared to the back

A hair transplant relies on being able to meet the demand for hair by the recipient surface area to cover; the hair that can be removed safely to ensure the donor area is kept in good condition and not depleted to the extent no further work can be carried out

Donor management is vital to the long term result a candidate can achieve; if too much hair is removed to treat a relatively small area as hair loss progresses the demand surpass what the donor can supply

The FUT technique relies on removing a hair bearing strip from around the sides and back; although the hair has been removed the overall density is hardly changed; FUE relies on the removal of follicular units from the surface area, so the density of FU´s will actually decrease

With planning it is possible even with high Norwood scale hair loss sufferers to give close or total restoration from hair line to crown, may be requiring a lower crown density being placed, but achieving a natural coverage

If the starting donor hair density is too low surgical hair restoration may not be a viable option; it may be able to treat minor hair loss but as hair loss progresses the demand for hair will out way what the donor can provide

With an average donor hair density of approximately 75 FUcm² if managed well can restore a higher NW stage hair loss candidate; a higher average density around the back and sides allows for greater planning and options, hair line placement as a point

The hair line placement has to take into consideration potential hair loss and the ability to sustain a balanced coverage from the donor hair available

The donor hair density can be easily assessed at a hair consultation under magnification; it can make an estimate of the density per square cm, the approximate average of hairs per grouping and any miniaturisation present; from this a Master Plan can be made how, when and where to start the restoration

 

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