Eyebrow restorations are similar to hair transplant procedures performed on the scalp in that the transplanted hair for most typical patients is permanent. However, eyebrow transplants differ from hair transplants due to a number of reasons. First of all, eyebrow hairs grow from a very small angle with regards to the skin. Eyebrow hairs emerge from the follicle at a very acute angle so that the hair grows flat to the skin’s surface. This is in contrast to scalp hair where the angle between the hair and scalp can be 45 degrees. Secondly, eyebrow hair growth cycles are much shorter than scalp hair growth cycles. The anagen growth phase of eyebrow hair is only around 4 months, while scalp hair can be in anagen phase can last 3 to 7 years. In addition, eyebrow hairs grow in dramatically different directions, and they differ greatly in all the various parts of the eyebrow. The hairs also grow as individual strands only--there are no follicular groups of 2 to 4 hairs in the eyebrow like there is on the scalp.

Using either body or head hair follicles derived by the SFET or FUE procedure, hair follicles can be transplanted to reconstruct the eyebrows. Unlike hair transplants, where the donor hair is taken from another part of the scalp and thus it matches perfectly, the donor hair for eyebrow transplants is taken from another part of the body and will therefore have slightly different characteristics with regards to both growth rate and appearance. If they are different, then over time, the transplanted scalp hair will slowly begin to approximate the growth pattern and characteristics of the existing eyebrow hair - but it may never totally match it. One problem with eyebrow transplants is that the hair will continue to grow, which necessitates the hair being constantly trimmed.