Surgeons confess the following:
‘The slit technique truly produces outstanding results,
but the surgeon must be extremely skillful’.
FORHAIR implements slit method. The skill of the
surgeon is a fundamental requirement, not a condition.
The slit technique involves difficult procedures since hair follicles
are implanted one-by-one. The level of satisfaction of patients is very high
as it produces excellent results through delicate surgical procedures.
However, slit implantation can be executed only if supported by various
surgical systems including high levels of surgeon skill, sufficiently
trained surgical team members, and investments of time and cost.
This is the reason why so many hospitals are not able to undergo the
transition to slit implantation easily. FORHAIR’S only goal
is to present satisfying results for patients and that is
why FORHAIR is great at SLIT implantation.
The action of making a slit is like generating the environment in which the hair follicles will live throughout their lifespans. It is the format of implanting hair follicles by making holes with a slitting tool, a small and sharp tool, one-by-one. It is essential to make spaces that are perfect for each hair follicle, not too small or large, in order to supply oxygen and nutrients to the follicles harmoniously. As such, the size of the slit made is very important in determining the engraftment rate.
The ideal method is to make slits as small as possible while allowing hair follicles to be inserted at once
without causing damage. FORHAIR increases graft survival by making slits with perfect sizes for each hair follicle.
Difficult to insert hair follicle
at once. Lowered engraftment rate
due to many contacts.
Create right sized slit for each graft.
0.8mm for single-strand hair follicle,
1.1mm for 2-3 hair follicles and
1.2~1.3mm for thick or curly follicles.
Although it is easier to insert
hair follicles,blood stagnation
and graft survival rate reduction
occur due to degraded supply of
nutrients from gap between hair
follicle and slit.
Engraftment rate decreases
when the follicle touches the bottom
Create right sized slit for
each graft.0.8mm for single-strand
hair follicle, 1.1mm for 2-3
hair follicles and 1.2~1.3mm
for thick or curly follicles.
Graft survival rate reduction
due to blocking of the
oxygen supply arising
from stagnation of blood
in the bottom space
Adjustment of slit depth is entirely up to the skill of the surgeon. Unlike an implanting device that semi-automatically probes into the scalp, slit depth is determined by the expertise and judgment of the surgeon whenever a hole is made. If the surgeon is highly skilled, he/she can feel the hair follicle roots touching the bottom of the slit. Since a hair follicle is highly fragile and soft, it can be overlooked unless the surgeon is equipped with an extremely fine sensibility. FORHAIR increases graft survival rate by enabling the inserted hair follicle to intertwine with the tissue by making slits of optimal depth.
Micro slit hole is same as or slightly smaller than the hair follicles size. Most of cases, grafts
are placed in the slit directly or after widening the slit hole. Either way, inevitably, it touches follicles.
FORHAIR has a history of successful implantation through the use of a
needle tool called a Dilator to reduce hair follicle damage.
Slit of smaller size
than hair follicle
Slit is touched slightly
with needle tool (Dilator)
at blunt end to widen
the hole momentarily
Successful implantation
at once without damage
to hair follicle
Widened slit closes up
again to its original size
and hair intertwines with
the surrounding skin tissue
Even if healthy hair follicles are collected and perfect sized slits are made, everything will go wrong if follicle
implantation is done incorrectly. Therefore, implantation is a truly important stage. FORHAIR is equipped with
unparalleled technological capabilities and expertise in hair follicle implantation.
The hair graft collected by FORHAIR’s exclusive punch has a skin tissue attached on the top so the upper part
is mushroom-shaped similar. Then, when we place it into the micro slit hole, it creates a snug fit.
Only highly experienced with sensitive manual dexterity can create snug-fit. Slit implantation too much relies on performers
and people say it is a weakness of the method but, it is strength to Forhair and we perform slit implantation well.
Magnified view of collected hair
follicle with skin tissue adhering
to the top portion.
Hair follicle implanted to fit perfectly
for the slit depth and scalp surface
The skin tissue bulges out on the
scalp surface and it will soon
naturally detach themselves.
Hair follicles are not implanted too deep by SLIT method for most of cases
but there is possibility of going deep if hair follicles are thin.
That is, if there is little tissue surrounding the hair follicle and no skin tissue at the top of the it, it may be inserted too deeply into the slit, since there is nothing to catch the scalp surface.
Therefore, there rarely are cases of implanting hair follicles too deeply at FORHAIR.
If the hair follicle is inserted too deeply and gets increasingly retracted into the slit hole, it may appear from outside that the hair follicle has not been implanted,
consequently resulting in double implantation of the hair follicle (“piggybacking”). In that case, the hair follicle will become entangled or damaged,
resulting in a in drop in the engraftment rate, thereby requiring precautions to be taken.
The direction of implanted hair is determined by the angle and direction of the slit.
Accordingly, the surgeon’s skill in making the slit is the most important aspect of the surgery.
In particular, if the hair is almost lying down as in the case of the hair line, eyebrows, and sideburns, it is advisable to make slits as low as possible, as though slicing pieces of sashimi. For the area of the hair whorl, a natural appearance is achieved by adjusting the slit direction in detail in a whirling shape.
Before
Marking hair whorl
and direction of hair growth
After shaving
Marked lines show
the direction of hair growth
After SLIT
Slit are created following
the existing hair’s direction like a spiral
An advantage of slit implantation is the ability to make high density holes regardless of scalp properties,
while a hair planting device faces restrictions in its use depending on scalp characteristics.
A hair implanting device generates a popping phenomenon, that is, the phenomenon of neighboring hair follicles bulging up due to the pressure created when inserting the device, which occurs due to the thickness of the inner diameter.
In the case of a hard scalp, the occurrence rate of the popping phenomenon increases due to the greater resistance experienced when inserting the device.
Therefore, it could be difficult to achieve the high density that the patient desires.
Neighboring hair follicles can bulge out due to pressure
generated when a hair planting device is inserted.
It is possible to implant 30~40 hair follicles per ㎠
without any popping, using a minute slit needle
Natural looking and abundant hair is what everyone wants. However, high density implantation does not simply mean implanting hair densely in an indiscriminate manner. Hair follicles need to be distributed with differing designs in accordance with the density in the donor area and the patient’s hair style. Since Asians have lower density hair than westerners but have a marked difference in color and size between the hair and scalp, it is necessary to implant hair at a higher density in order to ensure that the implanted hair does not appear sparse, and to ensure high patient satisfaction . With the exclusion of special cases, FORHAIR implants hair follicles at a high density of 40~50 follicles per ㎠ for men’s hairlines. Therefore, it is possible to achieve a natural appearance which is not easily noticeable, even for young men
80% of the normal density of 40~50 hair follicles per ㎠
70% of normal density of 40~50 hair follicles per ㎠