DHI (Direct Hair Implantation)

DHI (Direct Hair Implantation) is an evolution of FUE hair transplant that uses a specialized Choi pen-style implanter to extract and place grafts in a single instrument. Unlike traditional FUE — where recipient channels are pre-made before grafts are placed — DHI implants each graft in one motion, providing more precise control over angle, depth, and direction.

Advantages include: higher graft density (more grafts per cm²), more precise direction matching to existing hair, no need to shave the recipient area in some cases, and reduced graft handling time (which improves survival). Disadvantages include: typically smaller maximum session size (~3,000 grafts vs FUE's 4,500+), higher cost per graft, and longer procedure time per graft. DHI is particularly popular for hairline restoration where precision matters most, and for patients seeking dense coverage in smaller areas. Major DHI clinics — particularly in Turkey, Thailand, and Korea — drive significant medical tourism.