It may also reduce the mechanical properties. Some contain nickel or titanium. Sandblasted and electrolytically polished. Properties Corrosion resistant due to passive layer of oxide produced by chromium. Any nickel may create allergy.
Oxide film breaks down in hypochlorite cleansers.
Properties Thin and light. Resistant to fracture. To act as a cushion between the rigid denture base and the mucosal-covered alveolar ridge by elastic deformation under load. Properties Remains soft throughout its lifetime but does not bond well to acrylic denture. Properties Forms a physical gel which acts as a temporary soft lining for a few days, but the plasticiser and alcohol soon leach out and it then hardens.