Crown Troubles

I wasted the entire morning at the dentist! A week or so ago, I had a crown break. I got a temporary crown put on till the new one came in. My crown came in yesterday so I went in at 9:30 this morning to get it put on. The dentist worked with it a bit and then said that a corner of it was rough and needed to be reglazed, could I come back in an hour. A ran a couple of errands and went back at 10:30. Finally got back in around 11:00. He put it back on then had me bite down. CRACK!!! The crown broke. He had to put the temporary crown back on and have the crown made again. I have the worst luck with this tooth!