The Impact of Upper Face Botulinum Toxin Injections on Eyebrow Height and Forehead Lines: A Randomized Controlled...

Area of Science:

• Aesthetic medicine
• Dermatology
• Plastic surgery

Background:

• Forehead lines and eyebrow position are key aesthetic concerns.
• Objective data on how different forehead botulinum toxin injection patterns affect these features is lacking.

Purpose of the Study:

• To objectively evaluate the impact of three distinct forehead botulinum toxin injection patterns on eyebrow height and forehead lines.

Main Methods:

• Patients received botulinum toxin injections targeting eyebrow depressors and frontalis muscles in V-pattern, middle horizontal, or high horizontal patterns.
• Eyebrow height was measured using standardized photographs.
• Forehead lines were assessed using validated photonumeric scales.

Main Results:

• All injection patterns resulted in lower brow positions, except for the lateral brow edge, which elevated.
• The middle forehead pattern caused more eyebrow lowering than the upper forehead pattern.
• All techniques improved forehead lines, with the V-pattern showing superior improvement in dynamic lines.

Conclusions:

• Different forehead injection patterns yield varied outcomes for eyebrow position and forehead lines.
• Upper forehead injections are less effective for lines but help prevent eyebrow ptosis.
• The V-pattern injection demonstrated the most significant improvement in dynamic forehead lines.