I have questions about materials for revision rhinoplasty...

For my primary surgery, I used exactly the same as you: only septal cartilage, ear cartilage, and silicone. But I had severe nasal tip drooping. Drooping can also be an issue with skin/soft-tissue characteristics, but septal cartilage and ear cartilage are on the softer side, so it seems like they can't function as a support strut as well.. I don't know exactly why multiple materials are used together either, but,.

I have no idea what the person above is talking about. Seems like they lay down on the operating table with absolutely no knowledge of the materials. By material standards, septal cartilage is the best material. It's firm, can be harvested directly from the nose without cutting another area, and since it's your own tissue, there is almost no inflammatory reaction, but there is a limit to the usable amount. The amount differs depending on nose size, and if too much is taken and used, the nose can collapse, so cases using only septal cartilage are very rare. That's why ear cartilage or costal cartilage is used as an additional material. Ear cartilage is soft, so there is less postoperative hardness(?). Once the wound heals, other people usually don't notice it either. However, because it's soft, there tend to be many cases of the nasal tip dropping after surgery (probabilistic). Costal cartilage is firm, so it provides good support. Costal cartilage is often recommended for noses that need a dramatic look or a lot of correction, and these days costal cartilage is the mainstream. If safety is the priority and you don't care about scarring, then autologous costal cartilage (it's even more expensive). If you really hate scars and want to save your own costal cartilage (I don't really understand this, though), then donor costal cartilage. Of course, both have absorption-rate issues. For reference, donor costal cartilage is taken from a cadaver. Depending on the age at which that person died, the quality of the costal cartilage varies enormously + differences in absorption rate occur. Of course, depending on your body's reaction, autologous costal cartilage can also be absorbed.