Has my crown adjustment cracked my crowns? (Photos)

I have had my zirconium crowns (10 upper and 10 lower) for 4 years, no issues. I returned to the same practise for a check up, who advised they are more than happy with the oral hygiene and only slight adjustments/polish was made. I was very anxious and sought a 2nd opinion, where the 2nd dentist adjusted my bite as he said I had high points when biting (from the biting papers). He filed the crowns down, which now feel very rough . I am frightened that they are damaged :( Marks can be seen?