"Bi-Bi" technique for lip augmentation: A retrospective study on 30 cases

Area of Science:

• Aesthetic Medicine
• Dermatology
• Plastic Surgery

Background:

• Hyaluronic acid (HA) fillers are standard for lip augmentation.
• Current methods typically use one HA filler type and injection technique.
• Varied injection depths (superficial/deep) and tools (needle/cannula) are employed.

Purpose of the Study:

• To assess the feasibility, safety, and patient satisfaction of a novel lip augmentation technique.
• The technique combines two HA filler types and two injection methods (cannula and needle) across distinct anatomical lip zones.

Main Methods:

• Retrospective study of 30 patients.
• Procedure involved intramuscular injections (Stylage M via cannula) and intradermal injections (Stylage Lips via needle).
• HA filler rheological properties were tested before and after needle passage.

Main Results:

• Extrusion through a 33-gauge needle did not alter HA filler viscoelastic properties.
• No significant adverse events were noted, only expected post-treatment bruising and edema.
• High patient satisfaction (2.6/3) and a durable aesthetic outcome were reported.

Conclusions:

• Combining different HA fillers in specific lip planes (muscular and dermal) is safe and effective.
• This approach achieves both lip projection and fullness for a natural, enduring result.
• The study supports a differentiated injection strategy for optimal lip augmentation outcomes.