Hi..
Welcome to Healthcare Magic..
I have gone through your query and can very well understand your health concerns..
As per your query some soreness and sensitivity in a tooth on which crown is placed but it is not
root canal treated is not abnormal and the sensitivity wears of in 4 to 5 days..
But in case if you have pain then there is a need of evaluation and
x Ray to find out that if there is any
nerve exposed during preparing of tooth for placing the crown..
If this is the case you will have to get the root canal done, but if it is just sensitivity and not pain you can use desensitizing tooth paste like Sensoform or Thermoseal and relax as it will wean off gradually..
Hope this information helps and thanks for writing to Healthcare Magic..
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Thanks and regards..
Dr.Honey Nandwani Arora..