Is the Sientra style 107 implant the best choice to avoid rippling and wrinkling?

The 2 implants you mentioned are apples and oranges.  The Sientra style 107 is a  teardrop-shaped 5th Generation highly cohesive silicone implant.  The Allergan Natrelle Inspira line are round silicone implants that come in 3 levels of increasing cohesivity.   So, the first question is do you want round or teardrop shaped implants?  The next question is whether you are going over or under the muscle.  If you are going under the muscle, then I would not recommend the teardrop shaped implants.  This is because the round ones under the muscle look about the same as the teardrop.  Plus, the teardrop ones can rotate and may need a revision surgery to correct that rotation.  If you are going over the muscle, then the Sientra 107 and the Natrelle Inspira level 3 cohesivity implant are probably about the same in terms of rippling.  Be sure you have at least 2.5cm of upper breast thickness before going over the muscle.  Your PS can measure this for you and help you decide.

As an early adopter of the gummy round devices such as the Sientra Style 107 and Natrelle Inspira Soft Touch and Soft Touch Cohesive, I feel I can truly provide a valuable reply to your question.Unfortunately there is a third type of Inspira implant that I haven't mentioned.  That is the Inspira Responsive.  Here's the low-down:The Inspira Responsive uses the softest and least cohesive of the silicone gel in these three devices.  It was released into the US market October of 2015.  It has the most rippling and upper pole folding in the upright position of these three Inspira implants.  The implant was an improvement on older designs simply by increasing the implant fill from 85-95% of the shell capacity.The Inspira Soft touch uses a thicker more cohesive gel like that used in gummy bear implants.  It was released into the US market in April of 2017.  While providing improved smoothness and upper pole fill, I consider it to be the Goldlocks of implants:  not too soft, not too firm.Lastly the Inspira Cohesive device has the thickest and most cohesive gel of any round device available in the US.  This device was introduced into the US in September of 2016.  I believe this device to be the pinnacle of smoothness (no other implant is likely to have less rippling without being too hard) and the most round and supportive of the upper pole.  Some say that it can be too round and too firm, but when used in the right patient, it can do some pretty remarkable things.Now to the Sientra Style 107.  In general, I would say that it has comparable upper pole fill and rippling to the Inspira Soft Touch.  It may be slightly softer because of the technology Sientra uses to adhere the silicone gel to the implant shell requires less stiffness in the gel to achieve a similar level of stability and maintenance of upper pole fill.  Otherwise, these two devices are very similar.My advice would be for you to seek out the opinion of a board certified plastic surgeon who has experience with these devices and discuss with him or her the best option for your particular situation.Best of luck.(This is an original reply authorized personally by Dr. Brian Brzowski.  No staff assisted with the preparation of this material and it is a unique reply and has not been cut and pasted from prior replies).