What are the desired outcomes of botulinum toxin treatment for lip lines as mentioned in the chapter?

The desired outcomes of botulinum toxin treatment for lip lines include reducing dynamic lip lines, enhancing lip fullness, and preserving the natural shape of the lips while maintaining oral function.

Botulinum toxin treatment for lip lines aims to achieve several outcomes. Primarily, it reduces dynamic lip lines by partially inhibiting the orbicularis oris muscle, which smooths the overlying skin. Additionally, the treatment enhances lip fullness by causing lip eversion. It is also important to preserve the natural shape of the lips, including the philtral columns and Cupid's bow, to ensure minimal functional impairment. This means that while some difficulty with puckering, whistling, or sipping from a straw might occur, essential functions like eating, drinking, and speaking should remain unaffected.