Yes, if Elavil is effective and well-tolerated for your chronic tooth pain, it may be a good idea to resume taking it. It seems like Elavil could be a good choice for the type of pain you are experiencing. You are currently taking a low dose in an appropriate context, so continuing with it may provide relief. It would be wise to see if resuming Elavil helps alleviate your pain and determine if the pain is related to stopping this medication. If you have any more questions about managing pain, feel free to reach out.