MR injectable wrinkle treatment causes muscle relaxation of the injected muscles, which lasts from ten to twelve weeks. During that time, collagen remodelling repairs the damaged collagen beneath the wrinkle line and “fills in” those lines caused by the former movement of the now-paralysed muscle. This effect becomes more apparent with repeated injections and in many cases causes the lines to disappear over time.
This “filling in” effect accounts for some of the confusion surrounding how long injectable wrinkle treatment actually “lasts”. Patients need to keep in mind that the goal is to minimise the appearance of lines caused by movement, not to have a “frozen face” or to keep the injected muscles paralysed.
Experience with thousands of patients has shown that the vast majority using injectable wrinkle treatment on a regular basis will only need treatments two or three times a year to maintain the improvement.