My provisional veneers have been coming off every couple of days. Will it affect my final result? (Photo)

I got provisional veneers on teeth numbers 7,8,9,10 about 3 weeks ago. They have never stayed on for more than a couple of days, Except for the most recent time when my dentist reinforced #9 by adding extra cement on back of it. I can't bite down all the way but they have stayed on. 9 and 10 cement is much whiter even after already decided on the proper color. She had to grind them down inside each time to remove remaining cement. She says not her fault. will it affect final impression