Divide
horizontally your tooth in 3 parts: if only one part is
left, it is still possible to restore it. However, if the
breaking has for any reason reached the third part, even
partially, it may be necessary to make a crown in resin or mixed
porcelain. This example is valid as long as neither
the canal nor the gum has been affected.
Note:
This example is only meant as a guidance and should
never be used as a standard rule.