Mm.

And of course, I, um, I, I get given file systems and, and, uh, and I do, do use them.

Again, what I would say is I, I do have, uh, WaveOne Gold files in the, in the practice.

Not, not because I-Just, uh, you know, I use it for different cases.

Is because originally Hyflex didn't have these longer length files.

You know, the files come in different lengths.

Uh, a 21 millimeter, a 25 or a 31.

Mm.

Do you mean K files, or are you still talking about the actual systems like rotary and the actual proper-

So Dr. Roan, so Dr. Roan was using stainless steel hand files.

At this point, uh, NiTi, uh, wasn't a, a huge thing that was used.

I'm, I'm almost certain in nine- 1985 it wasn't used, it w- it wasn't even about.

I know NiTi was developed in 1960s by, um, the US Navy, and when it was developed it was kind of, um...

I'm, I'm also really, really worried that this, this file, I find this interesting, but I don't wanna bore the, the, the listeners.

Again, it's one of those things that was developed ages ago and completely lost in time.

I was gonna say, doesn't reciprocating produce more debris?