How is determined what fillings to use what's the difference between a microfi!
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the non microfil fillings are also called conventional, traditional or macrofilled composites. generally, these kinds are not used any longer due to their many disadvantages such as surface roughness, discoloration, polymerization shrinkage, coeff of thermal expansion and resistance to wear.
the difference between the two is the filler size.
macrofilled composites consist of ground quartz as the fillers, the average size being 8-12 microm but as large as 50 microm may also b present.
the microfilled variety has colloidal silica as the inorganic filler, the size being 0.04 microm in size, makin them abt 200-300 times smaller than the average quartz particles in traditional composites.
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Just for some added info. a composite is a tooth colored filling. An amalgam is a silver filling.
Source(s):
Dental Instructor
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