I had a root canal about a month ago (including crowning). Any suggestions?

The tooth receiving root canal treatment was at the top. But a day later when I was eating my food, I felt a small pain in the teeth below the crowned tooth. I visited the dentist and she said that the crown was too high and my lower teeth shorter. Till today, my teeth is still pain when eating. But it is only pain when eating foods like chips, Apple . But it is not pain when eating rice, noodle, meat , orange. May I know if I need root canal?

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