A tummy tuck is a procedure where not only fat is removed but also skin is removed. In individuals with moderate to severe skin excess, liposuction can further deflate the skin and make the problem worse. There are some new liposuction technologies that advertise skin tightening properties. Without listing specific device names, I will say that all of these technologies have mild skin retraction results at best. That is not discounting their use or place in plastic surgery. That being said, there is no technology that will convert a tummy tuck patient into a liposuction patient at the moment. A consultation with a plastic surgeon will help you better understand where on the spectrum you are in terms of skin excess, fat excess, and skin elasticity.