When a tooth present moderate damage that cannot be restored with just a filling but it is not extensive enough to need a crown, an indirect filling (Inlay or onlay) might be the restoration of choice.
An indirect filling (also known as partial crown) restores the tooth to its original shape and function. It returns the mouth to good health.
Indirect restorations typically require the restorations to be sent to a dental lab for fabrication and the they are cemented to the natural tooth been restored.