The duration of final outcomes of an endoscopic brow lift (Endobrow) will depend a lot on the surgical technique that was performed. That is, if all the ligaments were properly released, if symmetry was created by making specific cuts in the brow muscles to reduce their contraction, performing a balance between the depressor muscles and the muscles that raise the brows its mandatory. Above all and, most importantly, it is the fixation method that was used to place the eyebrow in the ideal position. If only sutures were used on the temporal phase, it won't be enough. The best approach would be to anchor the entire frontal flap to the skull. There are many different fixation methods. Sutures can be used or making a small shallow tunnel in the bone to anchor it to endotines .Endotine is a small bioabsorbable implant that elevates browlift procedures with its unique multipoint fixation technology. Small tines allow for optimal control and precision in tissue repositioning, resulting in more natural-looking results. The ideal is that at least all the periosteum, or the flap, or the tissue that was released is kept in an adequate elevated position for at least six to eight months allowing it to heal in that position. Then, once a good fixation method is performed and the released muscles have created a good balance, the result can last at least between five to eight years. Over time, little by little, the skin will have changes as you age, but the brows will never return to their pre-surgery position, but there will be gradual changes that come with the natural aging process. Hope this helps, and I wish you the very best.