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Direct Hair Implantation with Choi Implanter Pen involves several steps, including:

  • Planning the procedure
  • Patient preparation
  • Anesthesia
  • Harvesting of the hair grafts
  • Securing the harvested grafts
  • Implanting the grafts in the desired area or areas
  • Applying bandages in the donor area and receiving area

Each step is heavily dependent on the patient's needs. The planning phase usually involves blood tests, a thorough investigation of the patient's medical history and marking the donor area, and the receiving area. The patient's hair can also be shortened to make it easier for the doctor to harvest the grafts. Antiseptic solutions can also be applied to the scalp area before local anesthesia is administered in the donor and receiving areas.


The Choi Implanter is a device built with the DHI technique in mind. This ingenious device is loaded with follicular bundles made up of 1-4 hairs. The hair transplant technician will place the needle on the receiving area and press the piston to place the new hair graft properly. A hair transplant team made up of three members, and two Choi Implanters can implant up to 12 grafts per minute, which means around 700 an hour. The Choi Implanter allows the hair transplant technician to carefully direct hair growth patterns and to place the hair follicles closer than with other techniques.


This revolutionary technology was introduced in 1992 by Chio. With procedures becoming faster paced, the use of a DHI – CHOI Pen Hair Transplant allows the surgeon to take out the hair from the scalp, while a second physician implants them into the specific area with a needle or needle-free CHOI implanter. This, therefore, reduces the amount of damage that is caused to the follicle as well as reducing the downtime following the procedure and increasing the speed of the procedure. 


DHI hair transplantation provides consistent results. Surgeons use DHI-CHOI Pen to control depth, angle, and direction of the implant. New hairs grow as the natural hairs. There are no stitches and no scars with a DHI – CHOI Pen Hair Transplant, so patients recover quickly. 


Direct Hair Implantation with a Choi Implanter Pen is generally a very safe procedure, but nonetheless, side effects or complications can appear. Most patients will experience bruising, swelling, and small amounts of bleeding. Small cysts may also form after the procedure is performed, but these usually disappear by themselves or are treated quite easily.


The first results will be visible after about four months. The full effect of a hair transplant operation should be apparent at the one-year mark. It's possible that the transplanted follicles will themselves eventually begin to shrink and produce smaller hairs, in which case another transplant procedure is an option. 


What are the advantages of DHI Hair Transplant?

DHI procedure significantly reduces the transit time as compared to the current procedure of FUE, and thus minimizes the physical handling, mechanical trauma, chances of desiccation, hypoxia, infection, and grafts getting heated up. It is an effective surgical modality for hair restoration. Although it may appear slightly more difficult and long procedure for the traditional FUE surgeon in the beginning, with more practice and after improvement of expertise, it may take lesser time and turn out to be easier. 

What causes hair loss?

Hair loss, also known as androgenetic alopecia is a common problem which can affect men and women alike. This condition can be caused by systemic diseases, different dermatologic conditions as well as physical trauma, which can prohibit the hair from growing naturally. Hair loss can have a very negative effect on one's emotional wellbeing and self-esteem.


This content is written and reviewed by our medical content teamin August, 2019.