Failure of my Artas transplant, why?

I had an ARTAS FUE transplant one year ago and roughly 15% of the transplanted hair has grown in. To say it is a massively expensive disappointment is an understatement. I’m planning on asking the company/surgeon for at least a partial refund, but I’m curious – does anyone know how a transplant could fail to such a degree? What could the potential reasons be? I’m not seeing much online around the topic of hair transplant failures. Has this happened to any of you, and if so, were you able to get a refund? Any thoughts welcome.

The causes for failures of growth for any transplant are generally the same. It reflects on failures to control quality control process such as time the grafts are exposed to the air, transection of the grafts, out of body time for the grafts, trauma when placing the grafts from crush injuries and other mechanical injuries.  Most failures are team failures.  There are also diseases of the scalp that can cause a hair transplant failure including FFA, LLP and a variety of scarring alopecias.