Anatomy

Optometry

Nasolabial fold

Hyaluronic acid

Wrinkle

Surgery

Composite material

Materials science

Dentistry

Minimally invasive procedures

Filler (materials)

Blindness

Facial rejuvenation

Percutaneous

Gerontology

Cosmetic Techniques

Medicine

Clinical Anatomy

Hyaluronic acid filler injection is a minimally invasive procedure for facial rejuvenation that involves injecting filling materials to correct the volume or augment specific areas in the face. Deep nasolabial folds are a common concern in aging people. The simplest way to correct a deep nasolabial fold to rejuvenate the face is to inject Ristow's space with hyaluronic acid fillers. However, conventional injection methods, such as percutaneous injections using a needle, can cause severe complications, such as skin necrosis or blindness due to intravascular injections. Therefore, the aim of the present study was to introduce a safe technique for intraoral filler injections in deep nasolabial folds and review related anatomic features to evaluate the safety of this technique.

Hyaluronic acid filler injection for deep nasolabial folds: A novel intraoral approach