I have successfully treated the marionette depression with fillers. Bit let’s review the anatomy. The marionette “line” is actually a shadow, which is what makes all folds or wrinkles ultimately visible. This is due to gradual laxity above the retaining ligaments that keep the deeper tissue fixed to the bone, while the looser tissue above descends and folds creating a visible shadow. The correct and proper treatment is to tighten the looser tissue. That said, a facelift or energy based skin tightening is more involved than a filler injection, and one has to be cautious about avoiding a puffy look since the problem is not “deficiency” or volume, but rather laxity. Please consult with an experienced board certified plastic surgeon, facial plastic surgeon, or cosmetic dermatologist who can review with you all of your options. Best of luck to you.