How Much Can Saline Implants Be Overfilled?

Thank you for the question.  Based on significant experience, I can tell you the saline breast implants can be overfilled far beyond the upper limits of manufacturer's recommendations. You will find many examples of such cases on the attached link. Best wishes.

That look is best achieved with high profile implants filled to the upper end of their volume range.  It sounds like you have moderate profile implants, which are too wide and flat for the look you are trying to achieve.  I would not overfill a 450 to 700.

                  The
manufacturers of breast implants produce implants that have fill ranges which
are designed to give surgeons latitude in the operating room. These implants
allow adjustments in volume which can help deal with problems such as
asymmetry. These guidelines generally allow implants to have an additional 15%
of volume. Excessive overfill can result in device failure and resultant
deflation. It would be inappropriate to inflate a 450cc implant to 700cc and
this would probably result in implant failure.

                  Since
you had your surgery six months ago, your result won’t change without further
intervention. Your post-operative pictures suggest significant breast sag and
this appears to be your primary problem. This is the origin of your lack of
upper breast fullness. Correction of your breast sag represents the best
solution to your current problem. With a breast lift you might not need new
implants, but this could be accomplished easily in combination with breast lift
if it were necessary.

                  It’s
important that you discuss this issue with your surgeon, so an appropriate
treatment plan can be formulated. If you still have concerns a second opinion
may be necessary.