Over the past several years surgeons have used various techniques to perform follicular unit hair transplantation. One such technique is the Lateral Slit Technique, also known as Coronal or Perpendicular Grafting. This technique’s name is derived from the angle and direction in which the graft incisions are made.

While there are other techniques for performing densely packed and highly refined follicular unit transplantation, the lateral slit technique offers a high degree of control over the angle and direction in which the transplanted hairs will ultimately grow.

The lateral slit technique has been used both intuitively and systematically for years by hair restoration physicians. However, it has recently gained popularity as a systematic and precise way of performing follicular unit hair transplantation.

How our member physicians use the Lateral Slit Technique.

Many of our physician members use the Lateral Slit Technique exclusively or in combination with other techniques for creating graft incisions. The lateral slit technique enables a surgeon to create graft incisions at varying angles (ranging from 10 to 90 degrees to the scalp), including very acute angles that will make the transplanted hair grow out lying flatter to the scalp. The ability to create incisions at very acute angles is particularly useful in areas such as the front temples and sides where the hair normally grows out lying flat on the scalp.

The graft incision determines the direction of the hair growth

The lateral slit technique also helps enable a surgeon to determine the direction of the graft incisions. This then determines the ultimate direction of the transplanted hairs growth. Thus a surgeon can use this technique to control and vary both the direction and angle at which the transplanted hair will grow in order to mimic the subtle changes in hair direction that occur naturally.

Each graft incision is created by analyzing the neighboring hair so the surgeon can reproduce the correct hair pattern. As a result, as each transplanted hair emerges from the scalp it will grow and lay in a similar direction as its neighboring non-transplanted hairs.

Lateral slits can enable denser packing of grafts

Lateral slit incisions also tend to be more parallel to the scalp and thus more superficial and less invasive to the scalp’s underlying vascular structure. This parallel alignment also enables a physician to place more grafts per square centimeter with out the grafts compressing or popping up since the pressure exerted on the grafts does not push them upward from the scalp.

Using blades cut to the size of the grafts

Some of our members use custom blade cutters to create tiny blades to make incisions that match the size and depth of each follicular unit graft being transplanted. This enables a surgeon to safely dense pack more grafts into a given area during a surgical session. Healing time is also more rapid, with minimal scarring.

Typically most clinic’s blades range from 1.5mm to 2mm in size. However, by using the custom blade cutter our physicians can create blades as small as .7mm for a single hair graft and .9mm for a multi hair graft.

In addition, the blades created by the custom cutter are squared off to match the shape of the bulb end of a hair follicle. Non custom cut blades are typically spear pointed which requires them to be inserted deeper thus causing more trauma to the scalps vascular structure.

The ability to control the depth of the incision each blade makes is also critical. Each blade is placed in a blade holder that is set to not allow the blade to go any deeper than required for the graft to being placed in the incision. This minimizes unnecessary trauma to the deep vasculature of the scalp, thus enabling close tight incisions, minimal tissue swelling, and quick healing that leaves no visible scaring, pitting, or cobble stoning of the scalp.

Placing grafts to maximize their aesthetic result and coverage

The plane and direction in which each follicular unit graft is placed on the scalp can also impact the ultimate appearance of density that can be produced with a given number of grafts. This is because hairs within a follicular unit are typically next to each other inline.

Therefore by arranging each multiple hair graft on the scalp in a linear fashion to the line of sight, each follicular unit will provide the maximum appearance of fullness and scalp coverage. This also mimics how hair is normally aligned on the scalp.

Special thanks to Dr. DeYarman, Dr. Sharon Keene, Dr. Jerry Cooley, Dr. Alexander, and Dr. Glenn Charles for contributing their expertise and photos for this section.

Female hair loss, otherwise known as Female Pattern Baldness (FPB), affects 1 out of every 4 women in the United States. Recent findings have found that the incidence of FPB has been reported to be as low as 8% and as high as 87%. And, it does appear to be as common for women as for men. Most often, menopause is the most frequent time for hair loss in women to become apparent.

For a woman to lose her hair can be even more troubling than for men. A woman with thinning hair is not generally accepted as part of the normal aging process. Society has come to expect a thick, luxurious head of hair as part of the attractiveness in women.

While males and females can both experience thinning hair, they typically do not lose their hair in the same order or appearance.

Women with thinning hair compared to Men

Typically men observe their hair loss earlier, whereas women will first notice it in their late 20's through their early 40's. Female Pattern Baldness (FPB) is often seen during hormonal changes. These include the use of birth control pills, following childbirth, or during or after the time of menopause.

Top view of patient, showing excellent growth of transplanted hair.

In addition, men typically have localized areas (patterns) of thinning, whilein women this usually occurs as thinning across the top, or over an even wider area. When women have very diffuse thinning over much of their scalp they are generally not good candidates for hair restoration surgery. However, women with localized hair loss, similar to the typical male pattern baldness, can successfully undergo hair restoration surgery.

Thinning hair in females is also characterized by an increase in the combination of normal thick hairs mixed in with finer, smaller hairs. This results in decreased density, and not total hair loss.

A woman's hair has also been proven to be more sensitive to the effects of stress than men's hair. Stress can result in hair loss in women and men. But this type of loss is not female pattern baldness. Rather, it is known as “telogen effluvium.” This type of hair loss is the shedding of hair in the resting phase when the body senses that it needs to divert its energies elsewhere. Therefore stress can temporarily changes the amount of hair that is shed. But the lost hair is likely to grow back.

The production of the hair loss-inducing androgens is also different among men and women. A woman produces a small quantity of androgens in the adrenal glands and the ovaries. The ovaries also produce pre-hormones, which are then converted to androgens on the outside of the ovaries or adrenal glands.

Generally speaking, a woman with hair loss will probably not experience total balding in a given area. But if there is total hair loss, this is most likely a sign of a previously hidden disease. For this reason, it’s important for females to have their hormone levels checked by a physician if they are experiencing heavy hair loss.

Finally, men and women react differently to various hair loss treatment options. In men, hair loss may be halted or even reversed by finasteride (brand named "Propecia"). However, Propecia is not safe for females or children. Minoxidil (Rogaine) can be effective for both men and women in treating hair loss.

However, for some women the causes of their hair loss are much more complex than the classic "male pattern baldness". Thus proper diagnosis of the underlying cause is vital before any hair loss treatments are attempted.

The following physicians are nationally well known experts in female hair loss. Feel free to contact them.

David Whiting in Dallas, Texas - 214 824-2087

Vera Price in San Francisco, California 415 353-4163

Maria Hordinsky in Minneapolis, Minnesota 612 625-1493

Wilma Bergfeld in Cleveland, Ohio 216 444-5722

For a web community that is dedicated to female hair loss visit HerAlopecia.com

An Active Ingredient in Several Topical Hair Loss Treatments

Azelaic acid is a naturally occurring substance found in whole grains that contains a mild antibiotic designed to “clean” skin.  It is also said to be a potential inhibitor of 5-alpha-reductase in human skin.  A reduction of this enzyme may reduce the amount DHT (dihydrotestosterone) in the body and therefore, have a similar effect to finasteride; the active ingredient in FDA approved oral hair loss solution Propecia (finasteride). In theory, applying azelaic acid to the scalp may prevent or eliminate the binding of DHT to the hair follicle receptor, preventing hair loss and potentially stimulating hair regrowth.  Azelaic acid can be found in many prescription acne medication and topical hair loss products like Xandrox and Provillus. 

Combining azelaic acid with FDA approved hair regrowth solution minoxidil in a single topical product in theory, may prove to be a more powerful hair loss treatment for androgenic alopecia than minoxidil alone.  This is why some conjecture that Xandrox may be a more effective treatment than Rogaine (minoxidil). 

Azelaic acid has not been clinically proven effective as a standalone treatment for treating genetic female hair loss and male pattern baldness. It has also been known to irritate the scalp when applied topically.  Though there is a low percentage, azelaic acid may interact with other medications.  Be sure to consult your physician before using azelaic acid while on other medications.

Causes and Treatments

Alopecia is the medical name for hair loss to the scalp or body.  While Androgenetic Alopecia (genetic hair loss) is the most common, there are many other forms of alopecia related hair loss worth discussing.  Each medically named alopecia comes with distinct symptoms, a unique cause and exclusive treatments. Below, we've compiled a list of and description for the most common types of alopecia related hair loss along with the available treatment options for each.

While the information on this website can be used as a guide, men and women who believe they are experiencing hair loss should always be properly diagnosed by a qualified hair restoration physician to determine its cause. To learn more about each distinctive alopecia hair loss condition, click the links below.

Traction Alopecia
Alopecia Areata
Diffuse Patterned Alopecia
Diffuse Unpatterned Alopecia (DUPA)

Cicatricial alopecia (Scarring Alopecia)

Alopecia Universalis and Alopecia Totalis

Contained in Several Popular Hair Loss Treatments for Men

Nettle root extract can be found in a number of popular hair loss treatments, such as Provillus and Procerin, and at your local health food store as a standalone product. Conjectured to effectively inhibit the production of DHT, below we examine whether or not nettles are as effective as Propecia (finasteride) in blocking DHT and stopping the progression of male or female pattern hair loss.

Description

“Nettles” is the common name for Urtica Dioica, an herbal plant also known as the Stinging Nettle. This perennial herb is often eaten in many parts of the world and is often added to soups, salads or cooked as greens, though less frequently. Nettle leaves are long and pointy, but only the shoots and top of the plant are eaten. Nettle plants have dark green leaves and typically grow about 2 or 3 feet tall and its flowers are covered with tiny stinging hairs that contain an irritant. Allergic reactions are common if they come in contact with human skin.

Use of Nettles

Nettle root extract was found to partially block 2 enzymes by researchers such as R. Hartmann.  The first is 5-alpha-reductase that when combined with testosterone, produces DHT (dihydrotestosterone). DHT is the hormone responsible for androgenic alopecia hair loss. The second enzyme is aromatase, which makes estrogen.  Combining nettle root extract with another herbal agent pygeum has been found to inhibit these two enzymes more effectively than either one alon It was shown that nettle root extract had to be used at high dosages in order to effective whereas lower doses of pygeum worked well.  Prostatonin, the combination product of nettles and pygeum have been used to treat BPH (benign prostatic hypertrophy).

Studies by researchers JJ Lichius and others have shown a reduction in prostate growth in mice when large doses of nettle extract were taken orally. Combining nettle root extracts with saw palmetto berries in BPH patients reduced the amount of testosterone and estrogen. Conversely, it has been conjectured that nettles can block testosterone from binding to the sex hormone globulin, a carrier protein that binds testosterone and limits its bioavailability in the body. As a result, nettles have been called an aphrodisiac since it may help maintain testosterone levels.

Other uses of Nettles include treatment for arthritis, asthma, kidney, urinary tract infections, and last but not least, baldness.

Nettle Root as a Hair Loss Treatment

Like many other herbal supplements with some clinical evidence suggesting efficacy in treating enlarged prostates (BPH), some have claimed that nettle root extract may stop hair loss and maybe even aid hair regrowth.  Because Propecia (finasteride) works to stop the progression of male pattern baldness by inhibiting the production of DHT, it is conjectured that nettle root extract may be of similar benefit.

Nettle root is a popular ingredient taken orally in a couple big name hair loss products such as Provillus and Procerin.  Some have also conjectured that applying nettle root extract topically to the scalp may also facilitate new hair growth. Because many topical irritant type products are used to treat alopecia areata hair loss, some suggest nettle root extract applied topically may be effective in treating it. Those who conjecture its efficacy to treat baldness recommend doses of 500mg or more daily.

Though some have declared that nettle root extract may be an effective hair loss treatment, no clinical controlled studies have been performed proving its efficacy for androgenic alopecia (genetic female hair loss and male pattern baldness) or alopecia areata. 

Possible Side Effects of Nettles

Despite claims made that “all natural” herbal supplements are free from side effects, nettle root has its share of warnings. When topically applied, irritation of the scalp or an allergic reaction can occur. When taken orally, it can cause upset stomach, burning, difficulty with urination, bloating and edema.  Nettle root extract should not be used in patients with heart or kidney problems, due to fluid retention properties.
Those who want to try nettle root extract as a hair loss treatment should proceed with caution and consult their doctor before using it.