Dermis is one of the skin layers, which is in between the epidermis and subcutanous layer. It is the thickest part of the skin. The thinnest one is 0.6 mm in the upper eyelid and the thickest one is about 3 mm in the palm, sole, and back. For rhinoplaty purpose, dermis is harvested from the buttock, which has the thickest layer. After elliptical skin excision, epidermis and subcuatenous tissue are removed to obatin dermis (below photos).
Dermis is commonly used to cover the tip grafts to prevent showing. It is also used to camouflage damaged skin after failed rhinoplasties. Some surgeons use it to augment the dorsum after silicone removal. Augmenting the dorsum with dermis has two potential disadvantages: one is infection and the other is resorption. Once the dermis graft is infected, there is a high possibility of comcomittant skin damage, so absolute sterile technique is important. Resorption of dermis is somewhat unpredictable. In severe revision cases that has decreased blood supply to the dorsum, the resoption rate is very high. Resorption occurs slowly, so although it may look OK after a year, the dorsal volume decreases dramatically after 2-3 years.
Resorption of the dermis can be minimized or prevented by using dermis and cartilage together. Dermis acts as soft tissue camouflaging material on top and cartilage acts as volume filler underneath. By combination, the resorption rate of the original volume can be minimized.
Dermis is commonly used to cover the tip grafts to prevent showing. It is also used to camouflage damaged skin after failed rhinoplasties. Some surgeons use it to augment the dorsum after silicone removal. Augmenting the dorsum with dermis has two potential disadvantages: one is infection and the other is resorption. Once the dermis graft is infected, there is a high possibility of comcomittant skin damage, so absolute sterile technique is important. Resorption of dermis is somewhat unpredictable. In severe revision cases that has decreased blood supply to the dorsum, the resoption rate is very high. Resorption occurs slowly, so although it may look OK after a year, the dorsal volume decreases dramatically after 2-3 years.
Resorption of the dermis can be minimized or prevented by using dermis and cartilage together. Dermis acts as soft tissue camouflaging material on top and cartilage acts as volume filler underneath. By combination, the resorption rate of the original volume can be minimized.
From the photos above, dorsal augmentation using cartilage and dermis combination is well maintained even 4 years after surgery.
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