use term 'surface restoration procedure' instead of 'intracoronal restoration procedure'

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In defining tooth restoration procedures, we (mostly myself) have been overly 
hung up on the intra/extra coronal procedure distinction. This distinction is 
difficult to maintain b/c some procedures, such as onlays, have both intra and 
extra coronal dimensions to them.

I suggest that we replace the term 'intracoronal restoration procedure' with 
the term 'surface restoration procedure'. The goal is to make it clear that 
some restoration procedures are aimed at restoring particular surfaces, as 
opposed to restoring the crown as a whole.

Suggested definition:
A tooth restoration procedure in which the structural, aesthetic, or functional 
integrity of the tooth is restored by inserting dental restoration material 
into a site that is located in the surface of the tooth.

Original issue reported on code.google.com by [email protected] on 10 Feb 2015 at 5:29