Surgeons, what's your knowledge and opinion on CMC (carboxy-methyl-cellulose) hydrogel breast implants?

I’ve been in practice over thirty years and I have noticed this. Every time something is touted as being better or new and improved we later find out the unexpected problems. So I wouldn’t get ahead of this too much and I certainly am not going to be the first one to use them if they get approved. Let others be the Guinea pugs.

Since the FDA has not approved their use in the US, they are not used here. Many studies are required to achieve FDA approval. "Some" is not enough for approval.

The history of the breast implant, invented in the early 1960s, is very rich; in many ways a microcosm of medicine in general: experimentation, and incremental improvement over the years.
Hydrogel implants in general have been abandoned because of a list of associated issues including tissue edema/swelling, dissemination of the material into host tissues in the event of rupture, and capsular contracture.
Assessing the literature is a bit complicated because not all hydrogels are the same. While I could not find any specific information on CMC hydrogel implants; the shelf life of CMC is around 2 years. This alone would preclude its effect use for a breast device.
I hope this is helpful.
-Dr. Chike-Obi