Safety and efficacy of female chin enhancement and facial contouring with a 3-point injection technique, an imaging follow up with ultrasound and magnetic resonance

Abstract

This research aimed to assess the effectiveness of a 3-point injection technique using hyaluronic acid (25mg/ml HA reticulated Revanesse Shape G’ 203) to enhance the chin and mandibular border with hyaluronic acid 25mg/ml HA reticulated Revanesse Contour G’ 150. The technique involved injecting the filler into specific planes (supraperiostium for chin enhancement and subcutaneous for mandibular contouring) to achieve improved facial aesthetics. By combining needle and cannula, precise targeting was possible without severe complications. Thirty female participants with retrognathia and undefined mandibular border underwent the procedure and were evaluated at 21 days, and 9 months post-injection. Ultrasound technology facilitated accurate injections by visualizing facial structures and blood vessels. Additionally, one participant underwent magnetic resonance imaging with 3D reconstruction to confirm the precise placement of hyaluronic acid in the intended injection plane.