The speed of that machine now sort of resolves the question of how can so many grafts be done in a single day.
It appears to be very efficient at both extraction and placement. I think that is the key in making the donor appear less damaged. If you look at for example this result:
Резултат след танцплантация на 12620 микроприсадки, трансплантирани в две интервенции. При първа интервенция в два последователни оперативни дни бяха трансплантирани 9350 микроприсадки. 33 месеца по-късно бяха трансплантирани още 3270 микроприсадки в един оперативен ден. Показаният краен...
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It is clear the donor area is thinner, but the thinness is uniform and the scarring is minimized, so it doesn't look unnatural to the naked eye. Microscopically you would surely see more of course.
We can find so many examples of much smaller graft cases with patients unfortunately having huge crater areas in their donor, or not doing the extraction distribution correctly so it is over-concentrated in a single area. It is a combination of art and science to get it to look "just right".
Further, of course just having the tool isn't enough. The slits have to be made perfectly and it has to be used with the utmost care I presume.