Ten Years After hair Transplantation

Almost ten years after his hair transplant. Patient is now in his mid sixties.

Let’s see what happened to his hair after ten years.

From the vertex view photos before the surgery, we can see hair at vertex area is getting finer. To prevent a second surgery, Finasteride was prescribed immediately after the surgery.

When comparing the two vertex view photos (taken 2002 and 2011), we see that Finasteride didn’t help him too much to prevent hair loss. Therefore we can rule out the impact of Finasteride on the result of the hair transplant surgery.



The goal of the 10 year follow up study is to compare the quality of hair between the donor site and recipient site, and between the Bi-Follicular Unit and the Single Follicular Unit.

On one side he received one hair follicular units, Single Follicular Units and Bi-Follicular Units. The other side received only one hair follicular units and Single Follicular Units.

Method and Observation

We chose the terminal hair from both sides and clipped the hair closest to the scalp, then measured the diameter at the end of the clipping with a diameter measuring tool.

On donor Site: Ten hairs each were clipped from the left temporal area, right temporal area and mid-rear donor site.

On recipient Site: Thirty hairs each were clipped from the Bi-Follicular Unit site and Single Follicular Unit site. To insure we clipped the correct size of graft, we clipped hair 2 centimeters away from the hairline.

Bi-Follicular Units are on the left section of the coverage area
(Our left-hand side)
Single Follicular Units are on the right section of the coverage area
(Our right-hand side)
Date Part Left Side View Part Right Side View Front View
10/23/2011 IMG_3224 IMG_3220 IMG_3218
Date Recipient Site
(hair diameter in micron)
Donor Site
(hair diameter in micron)
Bi-Follicular Unit Single Follicular Unit
Average 58.38 Average 52.2
Left temporal Mid Right temporal
57.7 59 56.25

Average 57.65


We used hair diameter to compare the quality of the hair. The larger the diameter of the hair means the better quality of the hair.

Our control group is the donor hair. Ten years after the hair transplant, the diameter of hair of the Bi-FU is very close to the donor site hair ( 58.38 vs 57.65 micron). But Single FU hair is 10% smaller than donor hair (52.2 vs 57.65).

Patient is taking Finasteride but from the vertex photos we know the impact of the medication to his hair is insignificant.

We have always believed that transplanted hair will have the same quality and same lifespan as the donor hair. There are a few reports that mention that chubby grafts have better growth rate than skinny ones (quantity aspect) but no reports have mentioned about quality of the regrowth hair.

From the above study we found that the hair growth from Bi-FU keeps the same size as donor hair but the diameter of Single FU is 10% less. It means the size of hair is 24% smaller at Single FU hair. (26.1*26.1*pi/29.18*29.19*pi=76%).

Additionally, we always use chubby grafts, if you received skinny grafts, the difference between modified and skinny graft will much bigger.

Currently there are no studies about the impact of graft quality to the lifetime of the transplanted hair, but from studies on the impact of graft quality to the regrowth hair quality and quantity, we can assume that it will have some impact on the lifespan of the transplanted hair.