Thank you for the query.
Loss of temporary restoration should be replaced with a permanent restoration with GIC or miracle mix ,at least till you get a crown done for it. If the teeth is left unfilled then there are chance of re infection and breakage of the teeth when you bite on it . I suggest you to see your dentist
and get the permanent filling done and plan for getting a crown placed on to it as early as you can and make sure you donot eat anything hard on the teeth .
Hope this information helps you.