There are a number of reasons why many surgeons today use only Single Follicular Units (SFU) for hair transplants. Exclusively using SFU for hair transplants provides a more even “look” and fewer scabs immediately after surgery. As an additional benefit, surgeons can pack SFU more densely than modified follicular units.
However, there are three concerns:
Humans typically shed 60 to 100 hairs per day. These telogen stage hairs, or resting hairs, amount to 10% to 15% of our total hair at any given time. After about three months, the hairs re-grow and start the natural process over again. Telogen stage hairs are of concern for hair transplants because they are effectively invisible. In the process of preparing an SFU, the technician must trim off the tissue next to the SFU grafts possibly discarding the invisible hair inside the tissue. 10% to 15% of hair may be lost in this trimming process.
Dr. Seager, Dr. Beener, Dr. Beeher, Dr. Reed and Dr. Raposio each conducted studies to compare the results of chubby and thin grafts. These studies found that re-growth rates for chubby grafts’ are 20% to 51% more than the thin grafts. So far we haven’t heard any report indicating that the thin graft’s growth rates are better.
Thin follicular units-almost no tissue attached
This is the size used by other clinics.
Chubby Follicular Units
This is our Single Follicular Unit grafts
Thin Follicular Units – tissues are trimmed off
Used by other clinics
Chubby Modified Follicular Units
This is our clinic’s standard graft size.
3. Cost to the patient is almost double when using SFUs only and charged by the number of the grafts.
The cost associated with hair transplant surgery is also an important issue.