Direct hair implantation (DHI) is a modification of the FUE technique. In this procedure hair follicles are extracted one by one using a specialist tool with a diameter of 1mm or less.
The hair follicles are then loaded into an implanter tool, known as Choi Pen, and implanted directly into the recipient area.
During DHI, the creation of the canals and the implantation happen simultaneously. The Choi Implanter Pen gives the doctor more precision when implanting the hair follicles. This allows them to control the angle, direction, and depth of the newly transplanted hair.
Recovery time for DHI is similar to FUE. Results usually appear within a similar timeframe too, with full results typically taking between 12–18 months to appear.