Many cosmetic fillers will often last up to a full year, though some types of long-term fillers may last as long as two years or sometimes longer. For some people, minor adjustments and going maintenance injections are needed. Your results will be based on a number of factors, including the specific filler product used, amount of filler used, location of injection, and the specific rate of filler breakdown that can vary for each patient. Your cosmetic surgeon will discuss these details with you during your consultation.