For the past three years, ultrasound has been part of my daily practice - not an occasional add-on, but a routine step I now rely on before, during, and after injecting. What changed is not my technique. What changed is what I can see.

We inject in a plane where vessels, fascial layers, and fat compartments sit within millimetres of one another. And the anatomy we were taught is a model, an average, a useful fiction. Real patients depart from it constantly: a facial artery running superficially where it "should" be deep, an angular branch crossing where no atlas predicted it, a temporal vessel where I had always assumed safety. Ultrasound made that variability visible. It also made something else visible: the near misses.[IMAGE01:Claude Levy- Using aesthetic ultrasound scanning is a humbling experience]

Every practitioner who adopts imaging goes through the same quiet, uncomfortable phase - scanning a patient and recognising, retrospectively, the injections you performed blind for years, the vessel you passed beside without ever knowing it was there. Those retrospective frights are humbling. They are also the strongest argument for the technique that I know.

I owe this shift entirely to the practitioners who introduced me to it. My gratitude to Leonie Schelke, Peter Velthuis, and Carlos Zito is genuinely without limit. They did not simply teach me to operate a probe. They taught me to doubt what I thought I knew, and gave me the means to replace assumption with evidence - patient by patient, plane by plane.

That is not a marginal improvement in safety. It is a different way of practising. \-

Dr Claude Levy is a qualified oral and maxillofacial surgeon, stomatologist, and aesthetic physician practicing in the Paris metropolitan area.