Objectives: - Utilize facial ultrasound to visualize the injection anatomy of the lower face.
- Identify the target structures, specifically the depressor anguli oris muscle, for conducting ultrasound-guided or ultrasound-controlled botulinum toxin injections.
- Learn the principles of ultrasound-guided botulinum toxin injection into the depressor anguli oris muscle for the treatment of downturned corners of the mouth.
Introduction: Ultrasound is an evidence-based imaging tool for precise facial injections with fillers and botulinum toxin, aiding in managing filler-related issues. Botulinum toxin is commonly used to address the downturned corners of the mouth by relaxing the depressor anguli oris muscle, improving oral commissures and reducing the sad look. However, the proximity of muscles like the depressor anguli oris and depressor labii inferioris can lead to unintended toxin diffusion, potentially causing mouth asymmetry during facial expressions.
Materials / method: This presentation aims to demonstrate the incorporation of facial ultrasound in the evaluation of the lower third of the face and the administration of botulinum toxin into the depressor anguli oris muscle using two distinct methodologies: ultrasound-controlled and ultrasound-guided techniques.
Results: Ultrasound provides real-time visualization of subcutaneous anatomy, facilitating the precise identification of the depressor anguli oris muscle as the guiding structure in the lower perioral region. Utilizing ultrasound guidance for botulinum toxin injection enhances accuracy, necessitating smaller quantities of neurotoxin while preventing inadvertent diffusion into the depressor labii inferioris (DLI), thus mitigating the risk of asymmetries.
Conclusion: As aesthetic practitioners, prioritizing safety is paramount. Accurate interpretation of ultrasound images enhances our understanding of injection anatomy, providing a more reliable approach to administering botulinum toxin into the musculature of the lower perioral region. This method has the potential to enhance the effectiveness of our results, reduce the risk associated with higher neurotoxin dosages, and consequently lower the incidence of asymmetry following DAO injections.
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