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|Hair Grafting is a surgical technique that involves moving individual hair follicles from one part of the body (the donor site) to bald or balding parts (the recipient site). It is primarily used to treat male pattern baldness, whereby grafts containing hair follicles that are genetically resistant to balding are transplanted to bald scalp. However, it is also used to restore eyelashes, eyebrows, beard hair, chest hair, and pubic hair and to fill in scars caused by accidents or surgery such as face-lifts and previous hair transplants. Hair transplantation differs from skin grafting in that grafts contain almost all of the epidermis and dermis surrounding the hair follicle, and many tiny grafts are transplanted rather than a single strip of skin.
Since hair naturally grows in follicles that contain groupings of 1 to 4 hairs, today’s most advanced techniques transplant these naturally occurring 1–4 hair “follicular units” in their natural groupings. Thus modern hair transplantation can achieve a natural appearance by mimicking natural hair for hair. This hair transplant procedure is calledFollicular Unit Transplantation (FUT) or Follicular Unit Hair Transplantation (FUHT).
Donor hair can be harvested in two very different ways:1. Strip Harvesting – a strip of scalp is removed under local anesthesia, the wound is then sutured back together and this piece of scalp tissue is then cut in to small pieces, from which individual follicle is separated under magnification called “Follicles” or Grafts. These follicles or grafts are then transplanted back in to the bald area of the patient’s head. This method will leave a linear scar in the donor area, which is usually covered by the patient’s hair (if long) and almost invisible. The recovery period is around 2-weeks and will require the stitches to be removed by medical personnel.2. Follicular Unit Extraction or FUE Harvesting – individual follicles of hair are removed under local anesthesia; this removal uses tiny punches of between 0.6mm and 1.25mm in diameter. Each follicle is then reinserted back in to the scalp in the bald area using a micro blade. Because individual follicles are removed, only small, punctate scars remain. No suture removal is required.The procedureAt an initial consultation, the surgeon analyzes the patient’s scalp, discusses his preferences and expectations, and advises him on the best approach (e.g. single vs. multiple sessions) and what results might reasonably be expected.
For several days prior to surgery the patient refrains from using any medicines, which might result in intraoperative bleeding and resultant poor “take” of the grafts. Alcohol and smoking can contribute to poor graft survival. Postoperative antibiotics are commonly prescribed to prevent wound or graft infections.SurgeryHair transplant operations are performed on an outpatient basis, with mild sedation (optional) and injected local anesthesia, which typically last about six hours. The scalp is shampooed and then treated with an antibacterial agent prior to the donor scalp being harvested.
In the usual follicular unit procedure, the surgeon harvests a strip of skin from the posterior scalp, in an area of good hair growth. The excised strip is about 1–1.5 x 15–30 cm in size. Working with binocular stereomicroscopes or magnification loupe, follicles are carefully removed from excess fibrous and fatty tissue while trying to avoid damage to the follicular cells that will be used for grafting. The latest method of closure is called ‘Trichophytic closure’ which results in much finer scars at the donor area.
FUE harvesting negates the need for large areas of scalp tissue to be harvested and can give very natural results with little or no scarring.
The surgeon then uses very small micro blades or fine needles to puncture the sites for receiving the grafts, placing them in a predetermined density and pattern, and angling the wounds in a consistent fashion to promote a realistic hair pattern by inserting the individual grafts in natural angle & place.Post-operative care
Advances in wound care allow for semi-permeable dressings, which allow seepage of blood and tissue fluid. The vulnerable recipient area must be shielded from the sun, and shampooing is started a week after the surgery. During the first 10-20 days, virtually all of the transplanted hairs, inevitably traumatized by their relocation, will fall out (“shock loss”). After two to three months new hair will begin to grow from the moved follicles. Then the patient’s hair will grow normally, and continue to thicken through the next six to nine months. Any subsequent hair loss is likely to be only from untreated areas. Some patients elect to use medications to retard such loss, while others plan a subsequent transplant procedure to deal with this eventuality.
There are several different techniques available for the harvesting of hair follicles, each with their own advantages and disadvantages. Regardless of which donor harvesting technique is employed, proper extraction of the hair follicle is paramount to ensure the viability of the transplanted hair and avoid transection, the cutting of the hair shaft from the hair follicle. Hair follicles grow at a slight angle to the skin’s surface, which means that regardless of technique transplant tissue must be removed with a corresponding angle and not perpendicular to the surface.