The quantitative effect of botulinum toxin A over brow height

Area of Science:

• Plastic Surgery
• Ophthalmology
• Dermatology

Background:

• Botulinum toxin type A (BTX-A) is utilized for temporal brow lifting.
• Targeting the superolateral orbicularis oculi muscle induces lateral brow elevation.

Purpose of the Study:

• To quantitatively assess brow elevation following BTX-A paralysis of the superolateral orbicularis oculi muscle.

Main Methods:

• 10 female patients received 6 units of BTX-A injected into the superolateral orbicularis oculi.
• Bilateral brow measurements were taken before and 2 weeks after treatment using calipers.

Main Results:

• Significant increases in lateral brow to lateral canthus (CD), brow apex to upper lid margin (EF), and interpalpebral distance (GH) were observed.
• No significant differences were noted between pre- and post-treatment measurements for other parameters.
• Treatment maintained symmetry between the left and right sides.

Conclusions:

• BTX-A application to the superolateral orbicularis oculi muscle yields quantitative temporal brow elevation.
• This method increases interpalpebral and upper eyelid distances.
• BTX-A treatment in this region is effective for brow elevation and symmetry.