Capsulorrhaphy & implant exchange (Photo)

Thank you for the question and pictures. Based on your photographs and description of goals,  I think that you will do very well with a well planned/executed revisionary breast operation.  In my hands, this would likely involve capsulorraphy (adjustment of the breast implant capsule, maintaining better position of the breast implants below the nipple/areola complex).  In my practicI use a 2  layered permanent suture technique to close off the space inferiorly and laterally (towards the axilla). The use of acellular dermal matrix is an option ( although not usually necessary)  especially if significant implant rippling/palpability is present.
 The “internal bra” refers to a procedure where the breast implant capsule is utilized ( the procedure is called a capsulorraphy) to prevent the breast implants from moving too far downward or to the sides. Sometimes, the use of additional material such as acellular dermal matrix or biosynthetic mesh, may be helpful for additional support. In my opinion, careful attention to postoperative activity restrictions is one of the keys to success. In my practice, I asked patients to keep their elbows by their sides for the first two weeks after the procedure is performed. Longer-term activity is also restricted in an effort to avoid  the potential for implant malposition recurrence.
My best advice: select your plastic surgeon carefully. Make sure that he/she has significant experience achieving the types of outcomes you will be pleased with. Then, communicate your goals carefully, as  well.   I find that the use of goal photographs and computer imaging are very helpful during this communication phase. Working together you will come up with a good plan to achieve your goals.  Best wishes. 

I strongly recommend you choose the following:1. Anatomical shaped implants with ultracohesive 5G gel: being so skinny the round implants will look like 2 coconuts once they are settled beneath the nipples, and they do not fill the upper pole, about this the anatomical shaped implants are unique; additionally being so transparent your skin you are prone to ripple and be it visible, so the 5G ultracohesive gel is highly recommended to prevent such side efect.2. Capsulorrhaphy is, indeed, the one and only treatment for cases like yours, it is a very very difficult technique and you have to check the proficiency and skill of the surgeon carrying it ahead; if you wish additional fixation to prevent recurrence of the bottoming out dislocation then I'd tell you the top in the market about adhesion and fixation is the biovelcro of the polyurethace coated implants.See the link below to find few cases of my own practice very similar to yours which I had the opportunity to operate successfully on, sharing a lot of common features with the technical problem you have posted.
If you wish better grounded opinion well lit, focused and standard images have to be assessed: frontal, both lateral and both oblique views, also from underneath.
Feel free to request any additional information from me.