There are several things one can do to minimize chance of breast implant rippling:
use a smooth implant
place implant under the muscle rather than over the muscle
use silicone gel filled implant
However, if your skin is very thin due to weight loss, there is a higher chance of rippling. Recently, plastic surgeons are using cadaver dermis and placing it between the skin and the implant, essentially adding thickness to the skin. However, the cost of this allograft is usually prohibitive for most patients.
Please see a board certified plastic surgeon for a proper evaluation and treatment.