Prosthesis implantation is the fundamental method to redress skeletal nasolabial groove depression, with an improvement of up to 70–80% on average. The materials frequently used by Dr. Chuang are Medpor and Gore-Tex; common mild depressions can be corrected by Gore-Tex, and wide and deep paranasal depressions can be filled by the tough and thick Medpor, the results of which are also relatively distinct. By either of these materials, the procedures involve making a 1.5-cm incision at the superior area of the alveoli, limited detaching the skin adjacent to the paranasal depression from the skeleton via the incision, emplacing the sculpted Gore-Tex to the subperiosteal space, and adhering to the bone depression, which can be fully fixated after 1 month. In case of Medpor emplacement, besides cutting and sculpting to the appropriate size and shape, it should be fixate at the affected site by titanium bone screws to prevent future dislocation, so the recovery period is shorter than that of obtained by a Gore-Tex implant. Generally it takes approximately 1 week to become stable.
This surgery mainly corrects the structural (osseous) nasolabial groove depression. However, if patients have concurrent skin looseness and other problems of aging nasolabial folds, auxiliary injections such as hyaluronic acid injections, autologous fats grafting, or even temporal midface lift are indicated to achieve comprehensive improvement.