DHI Technique Hair Transplantation
When you decide on having a hair transplant operation, you start your own research to get maximum information about your options. This is a good idea because you can make a detailed discussion with your hair transplant surgeon to find the optimal method for you. You may have found so much information about FUE (Follicular Unit Extraction) and FUT (Follicular Unit Transplantation) and suddenly came across with DHI (Dense Hair Implantation). The DHI hair transplant method is one of the recent developments in the field of hair transplantation.
Advantage of DHI:
Less out of the body time of grafts.
Handling of grafts by SAVA and Choi Implanters
High Density due to small pilot holes.
Small diameter Implanters.
Small diameter punch. Minimal scar
Fast, Comfortable and faster healing.
Painless Needle free injections for anesthesia.
Single Step DHI:
Dense hair implantation in direct hair implanting can be done in single step and two step process. Common instrumentation involves Implanters and high magnification 5x and above.
SAVA implanters which stands for SAFE, ACCURATE, VERSATILE, Amplified angles for precise angulation.
We use single step DHI method when we have to densify existing hair especially in NON-SHAVE method. Majorly required in female hair transplants and in diffuse pattern alopecia.
Two Step DHI method:
When we deal with complete baldness case where surgeon deals with area with no or telogen hair.
Major disadvantage which happens in single steps DHI also called Stick and place method. In stick and place method adjacent graft may POP out due to skin asserted tangential forces which are created by freshly placed semi glued (as blood clot takes 5-9 minutes time) adjacent grafts in placed less then 2mm apart. So, if inter-graft spacing is less than 2mm than pilot stabs shall be done.
Pilot Stabs are tiny wound created 20-30% lesser than the size of desired sized Implanter.
Pilot stabs are again drilled with bigger sized implanter which recreates fresh incision. By this two- step method we get advantage of freshly made slit along with achieving high density.
Unlike FUE where slits are made which are larger in diameters than grafts and forceps tip size. And bigger hole size results in compromised density and donor area damage. When larger punches are used 20-30% adjacent hairs are damaged and hypo-pigmented light color dots are made at donor area.
These techniques involve high magnification loupes and microscopes. At Regrow we use Carl Zeiss loupes and 25x Microscopes.
Unlike FUE which is primitive technique. We generally name FUE technique when we harvest grafts first then site is created. Every surgery quality is compared with trauma associated. Lesser the incision size lesser the trauma and scar better the surgery.
Frequently Asked Questions
Firstly, you need to know the difference between FUT and FUE to better understand DHI. In the FUT method, a strip of tissue with hair follicles is extracted from the back of the scalp and implanted in the donor area. Incision is not used in the FUE hair transplant method, instead, a punch is used to extract follicle units and the extracted follicles are implanted in the recipient areas afterwards.
DHI hair transplant is a FUE hair transplant method and the main difference is the way how hair is implanted. In FUE hair transplant, the hair transplant surgeon makes incisions on the whole scalp and follicle units are placed on these incisions. In addition, the DHI hair transplant method does not require any incisions and a patented tool is used during each implantation on the scalp. As an alternative, the robotic hair transplant system can be applied. This system measures the depth and angle necessary for each hair follicle, that’s why it is also known as robotic follicular unit extraction.
If a patient is suitable with the DHI technique is conclusively determined after examination by the attending doctor. During the thorough examination by the doctor, bearing in mind the patient’s wishes, it is decided which technique should be used in the patient’s specific condition. Naturally it is possible to give some general guidelines to give a general idea towards the conditions in which DHI technique can be applied:
- In the DHI technique, donor hair is harvested at a different area on the patient’s scalp. This implies that the hair coat on the donor area is appropriately dense. If there is no sufficient hair-growth in the area, just above the neck, grafts are taken from the beard. And if the density of the beard is not sufficient, sometimes chest-hair can be used.
- Patients with hair-loss in only one region are usually eligible for the DHI technique. Especially since use of the DHI technique enables a very dense implantation of hairs.
- DHI technique can be applied to patients from the age of 21 and up.
- This technique can be applied to straight and thick Asian type of hairs, as DHI was developed in that region of the world. But it can just as easily be used to transplant thinner and curly hair types.
The look of a nice looking and well cared hairdo is considered very important, relentless of one’s gender. Although hair loss is generally a male problem, sometimes it is experienced by women as well. Superficial and cosmetic products and handling do not always prove to be enough in achieving a satisfying look. And they certainly do not give a permanent result. Therefore, to achieve a more qualitative and permanent result, a hair transplantation via the DHI technique can certainly be considered.