DAOs

The depressor anguli oris (DAO) muscles are small muscles located at the corners of the mouth. They are responsible for pulling the corners of the mouth downward, which can create a sad or frowning appearance. When these muscles are overactive or become more prominent with age, they can contribute to a perpetually downturned mouth or "marionette lines" (the lines that run from the corners of the mouth down towards the chin). Treating the DAO muscles with botulinum toxin (commonly known as Botox) can help improve the appearance of the mouth by relaxing these muscles and allowing the corners of the mouth to lift.

How Botox Treats the DAO Muscles:

  1. Injection Sites:
    • Botox is injected into the DAO muscles on both sides of the face. The injection sites are carefully chosen by the injector, usually a few millimeters away from the corners of the mouth to avoid spreading to unintended areas, which could affect surrounding muscles.
  2. Muscle Relaxation:
    • Once injected, Botox works by temporarily paralyzing or weakening the DAO muscles. This relaxation prevents the muscles from pulling down on the corners of the mouth, which allows the opposing muscles (like the zygomaticus muscles that lift the mouth) to take over, resulting in a more uplifted and neutral mouth position.
  3. Improved Appearance:
    • The treatment can create a subtle lifting effect at the corners of the mouth, reducing the appearance of a downturned or sad expression. The result is a more balanced, relaxed, and youthful appearance.

Key Points:

  • Subtle and Natural Results:
    • The effects of Botox on the DAO muscles are generally subtle, providing a natural enhancement without drastically altering facial expressions.
  • Temporary Effects:
    • The results of the treatment typically last about 3 to 4 months, after which the procedure can be repeated to maintain the desired effect.
  • Minimally Invasive:
    • The procedure is quick, often taking just a few minutes, and involves minimal discomfort with no significant downtime. Most patients can resume normal activities immediately.

Ideal Candidates:

  • Individuals with Downturned Mouth Corners:
    • This treatment is ideal for people who have a naturally downturned mouth, which may cause them to appear sad, angry, or tired even when they are not.
  • Those Seeking a Non-Surgical Option:
    • Botox treatment of the DAO muscles offers a non-surgical alternative to improve the appearance of the mouth and lower face, especially for those who want to avoid more invasive procedures like a facelift.

Potential Side Effects:

  • Mild Bruising or Swelling:
    • Some patients may experience mild bruising or swelling at the injection sites, but this usually resolves quickly.
  • Temporary Weakness:
    • In rare cases, there may be temporary weakness in the lower lip, which could affect expressions like smiling. However, this is usually mild and resolves as the Botox wears off.

Conclusion:

Treating the depressor anguli oris (DAO) muscles with botulinum toxin is an effective, minimally invasive way to enhance the appearance of the mouth by lifting the corners and reducing a downturned, sad expression. The procedure offers subtle, natural-looking results that can significantly improve facial harmony and boost confidence.

Frequently asked questions:

 

1. Is the treatment painful?

Most patients experience only mild discomfort during the injections. Fine needles are used, and a numbing cream or ice may be applied to minimize any pain or discomfort.

2. When will I see results and how long do they last?

Initial results typically begin to appear within 3-5 days, with the full effect visible in about 1-2 weeks. The results generally last between 2 to 3 months, after which follow-up treatments are needed to maintain the desired look.

3. What are the potential side effects?

Common side effects may include mild swelling, redness, or bruising at the injection sites. Rarely, some patients may experience temporary asymmetry or difficulty with mouth movement. Most side effects are temporary and resolve within a few days.

4. Who is a good candidate for DAO treatment with botulinum toxin?

Good candidates are individuals who have a downturned or sad appearance due to overactive DAO muscles and wish to achieve a more neutral or uplifted smile, also to prevent jowling appearing or getting worse overtime. A consultation with a qualified provider will help determine if this treatment is appropriate for you.