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This method of donor harvesting, removing follicular units one-by-one directly from the scalp, is what differentiates the FUE hair transplant from a traditional Follicular Unit Transplant (FUT), where the donor hair is removed from the scalp in one thin, long strip and then subsequently dissected into individual follicular units using a stereo-microscope.
Before the grafts are harvested, tiny “recipient sites” are made in the balding area of the scalp using a fine needlepoint instrument. The follicular units are then placed into the recipient sites where they will grow into healthy hair-producing follicles. The creation of recipient sites and the placing of follicular unit grafts are essentially the same in both FUE and FUT procedures. The difference lies in the appearance of the donor area and in the quality and quantity of grafts obtained with each technique.
Robotics & Other Instrumentation for FUE Hair Transplants
Follicular Unit Extraction is an instrument dependent procedure; therefore, the type of tool used for this procedure significantly affects its outcome. In fact, the development of increasingly better extraction instruments has closely paralleled advances in the procedure.
FUE hair transplants using the ARTAS® robotic system, developed by Restoration Robotics, for the extraction of follicular unit grafts. We are now performing all of our FUE transplant procedures using this technology. You can read more on this advanced system by visiting the Robotic Hair Transplant section or reading answers to frequently asked questions on Robotic FUE.
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The Origin of Follicular Unit Extraction (FUE)
The use of direct extraction to harvest follicular units was initially conceived by Dr. Woods in Australia as the “Woods Technique,” but he did not disclose the details of his procedure. The technique was first described in the medical literature by Drs. Rassman and Bernstein in their 2002 publication “Follicular Unit Extraction: Minimally Invasive Surgery for Hair Transplantation.” This paper provided the anatomic basis for the procedure, gave it its current name, and described the FOX test used to identify patient variability in harvesting, an issue which continues to be a significant challenge for doctors today.
Dr. Bernstein Testing Robotic FUE Upgrade
A major refinement in the procedure was advanced by Dr. Jim Harris by adding an additional step of blunt dissection to the technique, as this substantially reduced transection (damage) to follicles. FUE hair transplantation continues to evolve as more physicians learn about this procedure, gain experience with it in their practices and offer improvements to the technique.
Indications for FUE Hair Transplants
Because FUE does not leave a linear scar, it may be appropriate for patients who want to wear their hair very short. It is also an advantage for those involved in very strenuous activities, such as professional athletes, who must resume these activities very soon after their procedure.
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The technique is also useful for those who have healed poorly from traditional strip harvesting or who have a very tight scalp. FUE transplants also allow the surgeon to potentially remove hair from parts of the body other than the donor scalp, such as the beard or trunk, although there are many limitations to this process.
Possibly the most straightforward application of this technique is to camouflage a linear donor scar from a prior hair transplant procedure. In this technique, a small amount of hair is extracted from the area around a linear donor scar and then placed directly into it.
Some patients desire Follicular Unit Extraction simply because they heard that it is less invasive than FUT or is non-surgical. The reality is that both procedures involve surgery and in both cases, the depth of the incisions (i.e. into the fat layer right below the hair follicles) is the same. The difference is with the type of incision made. In FUE there are multiple round incisions scattered diffusely through the donor area and in FUT there is one single, long incision in the middle of the donor area. FUE should be chosen if the multiple round incisions are preferred and not because the technique is “non-surgical.”
Since FUE harvesting requires a much larger area compared to strip harvesting (approximately 5x the area for the same number of grafts) in order to perform large sessions of FUE, the entire donor area must be shaved. This can present a significant short-term cosmetic problem for many patients. In contrast, with FUT using strip harvesting, the donor incision can be covered with hair – even with very large sessions.
On the other hand, because there is no linear incision with FUE, patients can resume strenuous activities and contact sports much sooner after the procedure.
FUE vs. FUT
Follicular Unit Extraction (FUE) and Follicular Unit Transplantation (FUT) are frequently compared as if they are two totally different, even competing, hair transplant procedures. Despite this common misconception, the difference between FUE and FUT is the method by which follicular units are removed from the donor area in the back and sides of the scalp. The remainder of the hair transplant procedure is essentially the same.
However, the harvesting method does have important implications for the hair restoration procedure as it will affect the total number of high-quality grafts that can be harvested from the donor area and ultimately, the fullness achieved from the hair transplant. In general, the harvesting method of FUT via strip is superior to that of FUE for two main reasons. The first reason is that the FUT procedure allows the surgeon to produce the highest quality grafts by isolating the follicle units with minimal trauma (this disadvantage is minimized with Robotic FUE). The second is that FUT enables the surgeon to best utilize the most permanent part of the donor area. To more fully understand these concepts, click: Graft Quality and Utilizing Donor Hair.
Because the differences between FUE and FUT are significant, the pros and cons of FUE hair transplant surgery should be considered when deciding which procedure is best for you. Pros and Cons of FUE Hair Transplants.
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