surface filling/restoration

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We need a term represent the chunks of material have actually been put in teeth 
in order to restore them. The reason for this is that during a single 
restoration procedure a portion of restoration material will often span 
multiple surfaces. Thus, when a restoration fails, it is not enough to say that 
the surface failed. Rather, the whole portion of material, which may span 
multiple surfaces, failed.

In the code (see eaglesoft-fillings.lisp), I have represented the relation 
between the material and the surface restored using the 'is dental restoration 
of' relation like so:

procedure_instance <- instance of tooth restoration procedure
material_instance <- instance of dental restoration material
surface_instance <- instance of surface enamel of tooth

for each surface_instance that is restored during procedure_instance
  material_instance 'is dental restoration of' surface_instance

A proposed definition for the term could be:

surface filling =def. a portion of dental restoration material that restores 
(i.e., 'is dental restoration of') one or more tooth surfaces

Question:
Do we need similar terms for crowns, inlays, and onlays?

Original issue reported on code.google.com by wddun...@gmail.com on 5 May 2015 at 8:50