Temporary Onlay fell out

I have two questions:

How should I care for this tooth until my dentist can put a new temp onlay on.  It seems to be sensitive now causing some discomfort.

What should I expect when I go back to the dentist for a new one.  Will I need novacaine?

(the tooth is third on the top from the back not counting wisdon teeth)

[Jerome Bogin, D.D.S.]

If you can get some wax you can try to place it in the tooth.The dentist will either make a new temporary inlay or just put in a temporary filling. In all likelyhood you will not need any local anesthesia.

[pertykitty]

just keep it clean and please oh please dont use anything to fix it yourself! lol ive seen messes from self fixers. if its just a little sensitive i always remade my temps without anesth. but if you are in pain im sure they can numb you up.