It's no wonder you are confused! If you read closely the two answers already provided below mine, you will see that even among surgeons there is incomplete agreement on how to describe silicone gel implants and what constitutes the true "gummy bear" implant. Here is my take:The term "gummy bear" implant first really entered our vernacular with the introduction of textured, shaped silicone implants. These were investigational as part of the FDA's review of silicone implants which was a lengthy, multi-year process. Many surgeons prefer not to use form-stable (shaped), textured implants for routine cosmetic breast augmentation for a couple of reasons:1. They may rotate, changing the shape of the breast2. Textured breast implants have shown a statistically higher rate of ALCL, a rare cancer that can be associated with breast implant surgery (only a fraction of a fraction of 1% of all patients worldwide with breast implants have been diagnosed with this)Some uses of textured shaped implants include patients undergoing breast reconstruction and patients who might benefit from a small lift but refuse one.Cohesive gel is the actual makeup of the silicone gel that is used in all currently available silicone breast implants. Because the viscosity and physical characteristics of it make it not "runny," we often use the term "gummy bear" implant to describe the gel. I compare it to the difference between a jelly donut and a jelly candy or gummy bear: if you cut a hole in a jelly donut, you'd expect the jelly to spill out (at least some of it) whereas if you cut a jelly candy or gummy bear, it would largely keep its shape and the gelatinous material would stick together (be cohesive). MemoryGel is just Mentor's name for their cohesive gel. Smooth round is my favorite type of implant and there is considerable data demonstrating that these implants often adopt a slight teardrop natural shape over time anyway, which, when combined with the above risks of textured shaped implants, makes me very unlikely to switch from smooth round for most patients.