Textured implants are thought to not move as easily as smooth implants. I have not heard that they will not sag as much as smooth implants. I think as the tissue laxity progresses, the weight of the implant is more important.
Do Texture Implants Sag Less Than Smooth Ones over Time??
Doctor Answers 4
Textured Breast Implants and Sagging
Breast shape and the way it is affected by breast implants is MULTIfactorial in which implant surface (textured VS smooth), Shape Round (low, moderate, moderate plus and high profile) VS Anatomic (tear drop), Fill (saline VS silicone gel), Volume (in cc's) and weight (in grams) interact with YOUR breast volume and cover, location of the breasts on the chest wall, slope of the chest wall and area of flatness on which the implants can sit - ALL combine to dictyate the final look.
Textured implants DO have a velcro like effect by adhering more to the chest wall than smooth implants and as a result sag less when compared to SAME volume/weight round implants. However, they also ripple more and leak more frequently than their smooth counterparts.
No easy single answer here. All factors need to be weighed and analyzed as they pertain to you.