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.

Hair loss Myths - What is or isn’t true?

Maybe you’ve heard that wearing a tight baseball cap too often will make you bald or that if you wash your hair too much you’ll suffer hair loss. Well, they’re both old wives’ tales.

So what really causes hair loss and what’s myth?

Brushing to Grow Hair?

The idea of brushing the hair 100 times a day to stimulate the scalp circulation is a fantasy. In fact, if you brush your hair too much, you may end up injuring and losing hair.

This myth stems from the thought that hair loss was due to poor circulation and that brushing or massaging would improve blood flow and nutrition to the follicles. The truth is, bald or not, there’s no major difference in scalp circulation.

Styling and Hair Loss?

There’s some truth and some fiction when it comes to hair styling and Hair Loss.

It is true that certain hair styles, such as corn-rows or tight ponytails, can cause hair loss. These styles put undue tension on the hairs. But as for hair sprays, perm solutions, or coloring resulting in hair loss there’s no truth to that idea. These applications may cause some damage to the hair strands. But the all-important follicles, located under the skin, stay safe.

And what about the idea that haircuts will make your hair grow back thicker and faster? That’s wishful thinking. Everyone’s hair growth and length depends on their own unique hair cycle, which is based on both nutrition and heredity. The longer your growth phase the longer your hair growth.

Blowing away your hair?

What about hair dryers? Are these follicular incinerators?

The good news is there is no evidence that hair dryers cause thinning hair. However, too hot or too much drying may lead to brittle and breakable hair. Let common sense guide you and hold the hair dryer at a normal distance from your scalp and dry to your heart’s content.

Vitamins and Steroids?

Think about this – if you were losing hair because of a lack of vitamins or minerals in your diet, why wouldn’t the back and sides of your head be affected? In actuality, vitamin deficiency results in an even distribution of hair loss all over the head. Of course, it doesn’t hurt to take vitamins on a regular basis for your overall health.

Your follicles width and amount are based on heredity. So claims of hair growing miracle drugs or natural hair loss treatments are untrue.

However, steroids use can cause hair loss. Research has proven that anabolic steroids raise the levels of baldness-inducing male hormones. For those who are genetically prone to hair loss, this can speed up the loss in as little as 3 to 6 months. While this loss may be reversed, it can be permanent.

Sexual Activity to Grow Hair?

Unfortunately, there is no truth to the idea that the more sex you have, the less hair you’ll lose! And the same goes for the rumors that the chemicals released during sex can affect hair loss. Science has yet to uncover any proof to this fantasy. But that doesn’t mean you shouldn’t keep experimenting.

The Hair Loss Family Tree

Many men believe that if their father has a full head of hair, they’ll keep a good head of hair. But hair loss or hair growth is set by a genetic combination determined by both sides of your family.Of course, if your family tree is filled with balding scalps, you do have a better chance of losing hair.

Treatments that work

While hair loss sufferers spend small fortunes on treatments based on myths, there are several proven treatments, non-surgical and surgical.

Currently there are only two non-surgical hair loss treatments that are FDA approved for Hair loss. These two are Propecia (Finasteride) and Rogaine (minoxidil).

Other treatments may or may not help stop or reverse hair loss, but they are not formally approved by the FDA

To learn about proven treatments visit our Hair Loss Solutions section.

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.