In all cosmetic practices there is a demand for non-surgical skin tightening, especially in areas where visible scarring could result, e.g. face or neck lift. There are many devices on the market for non-surgical skin tightening. All have similar principals: heating of the subdermal layers without overheating the epidermis to induce skin contracture. In the most basic terms, the major drawback has been temperature control and depth of treatment. How hot does the epidermis, dermis and or sub-dermal tissue become and can it be achieved safely?
Thermistor-controlled subdermal skin tightening (ThermiRF) acts is inserted into the percutaneous space and heats the tissue through radio frequency. The temperature of the hand piece is self-regulated, heating the surrounding tissue to the desired temperature (usually 55-65°C). At the same time, the epidermis is monitored via a real time infrared camera (40-43°C). This can be done in the office setting with local anesthesia, with or without liposuction. The procedure takes less than an hour and is well tolerated.
For appropriate tissue tightening, superficial subdermal heating as well as deep adipose and subcutaneous tissue are required. Paul et al. (2011) described tissue contracture as a result of treating subcutaneous collagenous tissue, rather than dermal collagen only