Revision Rhinoplasty, does diced cartilage wrapped in fascia need blood supply to remain without breaking down/being reabsorbed?

Yes, any graft needs blood supply to keep them alive. The survival depends more on the blood supply than where the graft came from. Grafts that do not obtain adequate blood supply will quickly die, usually in 2-3 weeks. The nose has a very good blood supply, so that grafts rarely die.

Yes, for cartilage grafts to survive they'll ultimately need a blood supply. With using your own cartilage as a donor source the body naturally grows new blood vessels to supply the cartilage so the cartilage shouldn't break down or reabsorb.

Thank you for your question.  I perform crushed cartilage on more than 80% of my rhinoplasties and I perform roughly 8 monthly.  Crushed cartilage grafting alone is highly successful and when wrapped in fascia (temporalis more than likely), it is more successful.  This is a very common procedure done by experienced rhinoplasty surgeons.Seek the advice of a double board certified Facial Plastic Surgeon.

 All grafts require blood supply in order to live, whether it's a bone graft, diced cartilage graft, or a  Cartilage dorsal onlay graft. Choose your surgeon based on extensive experience producing natural results, since revision rhinoplasty is a very difficult endeavor.

Blood supply is always important in every surgical operation but diced cartilage fascia grafts are very successful with very little risk of resorption whether the cartilage is taken from the septum, ears, or ribs.   I have and continue to use this technique for many years.