Will UHP give me a fuller rounder look? I am 5’8 120, 13.1 breast width

No, if you keep the volume fixed, as in 470 cc, an UHP implant will have a smaller diameter and will not extend up your chest as high as your current implant. This will result in LESS upper pole fullness. What you need is a wider diameter implant, and possible higher volume.

A higher profile does not equate more upper pole fullness. A higher profile implant means that the implant has a narrower diameter for the amount of projection that it provides. This will just look more like a round ball as opposed to providing an upper pole fullness. I would recommend seeing an expert in revisionary/secondary breast surgery (must be a board-certified plastic surgeon by the American Board of Plastic Surgery).

Dear Cool544590,
implant profile is a very important consideration. Many patients wrongly assume that the higher the profile the better. The truth is, the more profile (or projection/height) and implant has, the narrower its base has to become. This has several problematic consequences. The first is that the patient loses width and therefor cleavage of the breast. The second is the breast becomes more narrow and pendulous, often falling lateral and onto the side of the chest, and third, high profile implants have a higher risk of bottoming out because they exert more pressure on the inframammary fold than moderate profile implants. High profile implants do have a role in symmastia repair (when I need to narrow the basewidth) but otherwise I try to avoid them.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery