“…It has long been recognized that exposure to cleaning methods and solvents, sunlight, and oils of human skin has altered the color stability of silicone facial prostheses. Since 1969, reflectance spectrophotometry 3,4,28–36 and color and optical density 2,5,37,38 have been used to evaluate the color stability of maxillofacial prosthetic materials subjected to natural weathering, artificial aging, passage of time, ultraviolet light exposure, etc; however, no studies have evaluated microwave energy and its effect on the color stability of facial elastomers.…”