Hair transplantation methods can be divided into two categories, hair follicle unit transplantation method and hair follicle drilling method. The cutting method of hair follicle unit is to cut a long scalp from the occipital part, then separate the hair follicle under the microscope, and then transplant the hair follicle unit to the part where the hair follicle is missing under the microscope, just like transplantation. The method of extracting hair follicles for transplantation is to extract a single hair follicle from the occipital region, which is similar to the method of transplantation to transplant a single hair follicle to the hair loss site. There is no obvious difference in technology between the two methods, and the corresponding treatment is mainly based on the patient's situation.
The so-called 3d hair transplant is said to be more sophisticated and not innovative, but it may be that the scar is smaller and easier to heal, or it may be a commercial stunt.
Now the hair transplant technology is very mature. To put it bluntly, it is only a small operation, which belongs to the covering operation in cosmetic surgery, and its effect and safety need not be doubted. The key consideration should be the cost of hair transplant. The choice of hospital is also very important. Even with mature technology, it is hard to say what will happen in the hands of quacks.