Threads contouring treatment has been available for more than 100 years this treatment failed to gain a lot of popularity due to the invasive nature and level of discomfort associated with threads treatments some of the threads used up to now are not biodegradable and the end result can cause visible asymmetry polydioxanone pdo threads are not a new type of thread doctors have been using it for wound closure worldwide for more than 15 years this type of thread is safe and has less disco