Direct Hair Implantation, beacuse doctors can get higher density in this method.
But we should not forget that DHI is for patients with low level hairloss, and patients under 40 years.
Doctors need to decide which patient is better for DHI ,and which patients are better for FUE for example, 25 years old patient with hairloss only in the right and left corners, DHI (Direct Hair Implantation) can give a more density result . But a patient with Norwood scale 5-6 hairloss stage, FUE will give a better result.
If we check on Norwood scale DHI is better for 2, 3, 4 hairloss stage and FUE is better for 5, 6, 7 hairloss stage.
DHI method is the newest method in hair transplant. Extraction is the same with FUE method. They use micro motor for taking grafts, But implanting process is different. Doctors use implanter ( choi ) pen in implanting process. this is choi tecnique..
Thats why sometimes this method is called choi method.
Hair loss occurs more common among the people that smoke. So amount of the oxygen in the blood decreases and less oxygen reaches to hair cells. Consequently, hair cells that cannot take enough oxygen to survive, start dying in time.