The highly cohesive form stable silicone devices, Allergan Style 410 and Mentor CPG, are available as part of ongoing FDA studies. They are not yet approved for unrestricted use and there are a limited number of surgeons in the United States who are participating in those studies. The Allergan devices are approved in Canada, Europe and Australia. There are two separate trials for the Allergan 410(gummy bear) device, one for patients that have never had implants and another for those undergoing breast reconstruction or who desire removal and replacement of their current implants.
When one looks objectively at the data and the "trade offs" of all the devices- saline, traditional silicone, and highly cohesive form stable gel there are some potential advantages for some patients with the form stable devices. Particularly for breast reconstruction, as well as for those breast augmentation patients with thin soft tissue cover who desire a very natural result . I have not had a patient complain of firmness with the Allergan 410 device. Having said that there are upsides and downsides to the decision making. If you are interested in a gummy bear device seek out a plastic surgeon who will review the options and trade-offs after taking your history and listening to your desires and expectations. An examination and careful measurements of your breast and chest dimensions and tissues are important in the decision making process.
You may also want to ask your surgeon to arrange for you to speak with patients who have the device you are interested in to get the patients perception of how they feel.