TECHNICAL CONSIDERATIONS IN THE USE OF POLYMETHYLMETHACRYLATE IN CRANIOPLASTY

Polymethylmethacrylate (PMMA) is a self-curing acrylic resin that can be used in the repair of cranial defects. It is available in three for ms: PMMA without mesh, PMMA reinforced with mesh, and PMMA preformed t o fit a defect. In cranioplasty, the size and location of the defects provide the selection criteria for the use of PMMA. PMMA without mesh is ideal for small defects (5 cm(2)-15 cm(2)). PMMA reinforced with me sh is used for moderate sized defects (16 cm(2)-49 cm(2)). For very la rge defects (greater than or equal to 50 cm(2)), a CT scan guided mold is recommended because it provides the ideal contour and shape that s imulates the normal skull.