Ulthera and VShape are both used in this area to tighten skin. Your best bet would be to have a consult with a cosmetic surgeon who offers many different types of treatments so that you can choose what suits your needs the best. Good luck.
Unfortunately, without surgery and the scars, any other option will be temporary. You can achieve good results with heat based treatments, like radio frequency, that require maintenance. There is also physician quality skin tightening creams that can help supplement in office treatments.
Wrinkles on Body -- Thermage/Ultherapy, Venus Legacy/Velashape, ThermiRF, Fraxel, Microneedling/PRP
I suggest you see an expert you can get wrinkle improvement with skin tightening procedures and lasers/microneedling. We often use thermiRF with thermage and sculptra for improvement. Best, Dr. Emer
Wrinkles around knees...
Thank you for your question. There are many different treatment options for wrinkles above you knees depending on exactly what you are looking to accomplish. The simplest options would be Ulthera, Thermi or the new thread lift procedures like Nova Threads. Regards, Dr. Matt Elias