No Stupid Questions

FWIW, and I'm only mentioning this because of the phrasing of the question, plastic surgery isn't named after 'plastic' (the noun), but for 'plastic' (the adjective). Plastic surgery was used as a term decades before plastic (the noun) was even invented!

But anyway, to answer your question, people tend not to use silicone in implants so much nowadays, preferring saline instead (as another person said). The main reason is that it is much less problematic if there is a rupture.

Leaking silicone is not immediately dangerous, but does need to be removed - which is difficult as it can squidge about under other tissues, causing mischief as it goes. Saline, by comparison, will just get absorbed by the body, usually harmlessly.

IIRC, cosmetics are typically bags of saline (salt water) placed under the muscle. I don't believe the effect touch at all. With significant trauma, the bag would rupture, the saline would leak out and get absorbed in the surrounding tissue, and would need to be removed.

The word plastic in this case does not mean that actual plastic was inserted or injected. And it is not always cosmetic either. It only means that the shape or form was modified or reconstructed.

It depends on the implant.

Generally, they'll be placed in a way that avoids interfering with nerves or blood supply. When it does happen, that's a failure, not a normal part of the process.

Something like facial implants are usually solid (always, afaik, but I ain't sith enough to deal in absolutes) rather than injected. You do have injections for cosmetics, but those tend to be into the lips almost exclusively.

The kind of injections that go into lips wouldn't spill out after an injury. They use materials that aren't liquid. Even the grotesque versions you see sometimes aren't just bags of liquid under the skin.

Where you run into liquids, it's going to be breasts and asses for the most part. The saline based ones will spill out if the "bag" they're in ruptures. It's just salty water, more or less, inside a sac.

Silicone implants are more of a gel, and thus wouldn't "spill" in the same way, but if the container is ruptured can seep out into the body. It's kinda like a thick jello in consistency, to use your own example.

But it is difficult to rupture the containers. They can be pierced, obviously, but enough force to just pop one is also enough force that you have other things to worry about.

Now, all of that assumes legal procedures. There are people out there that will essentially shoot caulk into their victims. And you'll find some fucked up fakers that will do incorrect versions of otherwise safe-ish medical procedures, like transferring one's fat from one place in the body to another.

And it's important to note that there are procedures out there that do involve stuff that might match what you're asking a bit closer, but they're not exactly common

There's also fat transplantation, which wouldn't be affected by such injuries I don't think