Lip Augmentation or Enhancement includes both Anti-Wrinkle treatments and or Lip (Dermal) Fillers used specifically for issues around the mouth and lips.
The Anti-Wrinkle Treatments are focused on the muscles affecting the Upper lip lines and Downturn smile. The Dermal Fillers are used to achieve definition or volume of the lips themselves or as a more expensive and longer lasting solution for the eradication of upper lip lines and a downturn smile.
Remember that Anti-Wrinkle treatment will prevent you whistling for a while or even make drinking though a straw tricky!