could be wrong but from what I’ve seen online, it’s more popular to use your own cartilage. The reason why rib cartilage is popular is because you don’t want a foreign material, and the body is less likely to reject your own body material(it’s not a high chance of rejecting silicone or donated rib but the rate is higher then your own rib). Using donated rib would count as foreign.This is so helpful! Is it more popular to use donated or your own rib cartilage?
Other then that, using donated would mean you don’t need to recover from your ribs and is usually cheaper. If you’re doing revision, you may have no choice but to use donated.