What is the density given in transplantation? How is the number of grafts calculated?
The normal density given by nature is about 80-100 units / sq cms. Since the donor area is limited and therefore donor hairs are also limited, it is not possible to give this density in bald area in transplantation. It has also been shown that a density of 40-50 is optimal for good growth and also gives good cosmetic look. So generally this is the density which is planned. However a higher density can be given if a patient desires, subject to the following issues: a) The more the density, lesser is the survival of grafts b) The more number of hairs you use in one transplant, the less you have for future transplants. c) Of course, cost goes up as more grafts are transplanted.
