3D stereophotogrammetry quantification for tissue repositioning using Botulinum toxin A: a case report

Abstract

Hereby, we objectively assessed the outcomes of a facial-lifting procedure with Botulinum toxin type A (BoNT-A) using a 3D stereophotogrammetry quantification (3D-SQ). A 46-year-old female patient received a full face BoNT-A treatment in a total dose of 180 Speywood Units (sU). Frontal, lateral and oblique photographs were taken before and 20 days after treatment, at rest and during mimic movements. Also, a facial scanning was performed before and 20 days after BoNT-A injections. The results were analyzed using a 3D-SQ software. The photographs showed a decrease in expression lines and dynamic wrinkles. In addition, a better-defined jawline and volume gain in the midface area with improvement of the profile appearance, due to the reduction of the sagging skin under the chin, was observed. The 3D-SQ showed volume gains of 1.17 ml on the right and of 1.59 ml on the left cheekbone areas, due to the cranially soft-tissue repositioning. In addition, a decrease in the volume of melomental folds areas (0.27ml on the right and 0.41 ml on the left side) was reported, compatible to the above-mentioned volume gain. Measurements considering cephalometric points showed a decrease in the total facial height (distance from Trichion to Mental points), suggesting a soft tissue dislocation in an upward direction. Finally, this case report showed quantitative results that can evidence the role of BoNT-A in faciallifting procedures. These results reinforce the importance of using a 3D-SQ to assess the outcomes of BoNT-A and, probably, other aesthetic procedures.

How to improve infraorbital hollows with neuromodulators–A clinical prospective interventional study about the application of facial biomechanics

“…This shift in balance between in total facial elevators and depressors (comparable to a tug of war) favoring the elevator muscles resulted in increase in midfacial volume, decrease in lower facial volume, and increased gingival show during facial animation. The increase in midfacial volume following neuromodulator treatments was novel and was reproduced in an additional independent study since then 3 …”

“…The increase in midfacial volume following neuromodulator treatments was novel and was reproduced in an additional independent study since then. 3 Clinical implementation of this technique resulted in additional positive effects like reduced severity of the tear trough and elevation of the tail of the eyebrow. However, both effects were not described in the initial study.…”