For some people, lip augmentation should be permanent, and surgery or implantation of permanent fillers is appropriate. As dermal fillers have improved over time, however, these options are no longer as popular as they once were.
One reason that I often favor long lasting temporary solutions (dermal fillers such as Juvederm or Restylane and occasionally Perlane) is that the lips change over time. As we age, the lips undergo multiple transformations in shape, size, and definition. Lip enhancement that is aesthetic and attractive at 25 years of age may appear odd at 45 and ungainly at 55.
Another reason is changes in our concepts of beauty. We may prefer a particular look this year, but favor a different contour and shape to our lips the next. Since surgery may be irreversible and permanent implants are more likely to leave altered anatomy and scar tissue behind even if removed, younger patients may desire a less permanent change.
However, these surgeries can produce fantastic results. When appropriate, implants of alloderm, dermal fat, Gore-tex, and even newer products still being researched can produce a pretty pout to the lips and are long lasting. Synthetic implants can often be removed without significant difficulty; fat grafts can occasionally be trickier to remove, depending on a host of factors.