Some amount of hair grafts can be unproductive during 6-8 hours of operation since they wait to be transplanted. While preserved in a special liquid and in a cold atmosphere, the percentage of living productive grafts increase.
As a result, more healthy grafts are transplanted and the results are more dense.
Also, special sapphire tools are used while opening the channels which are the tiny holes into which the grafts are inserted) Sapphire tools do not create scars on the head and the healing time is short after the operation.