CelGro has been shown to improve tissue in-growth and repair in clinical studies using the collagen medical device to augment repair of the rotator cuff tendon within the shoulder.
What clinical studies are they referring to?
I see nothing on https://www.ncbi.nlm.nih.gov/pubmed/?term=CelGro. I also don't see anything on https://www.ncbi.nlm.nih.gov/pubmed/?term=Orthocell (Orthocell is the firm that develops CelGro).
https://web.archive.org/web/20170921025826/https://static1.squarespace.com/static/55d2ae4ce4b0e20eb51007ce/t/57622ba729687fa7422bc538/1466051497971/Early+Positive+Results+Tendon+and+Celgro+-+%252716.pdf just says:
the first three patients to receive CelGro showed no complications and demonstrated that the scaffold is safe […].