Is there a temporary cement for provisional veneers? (Photo)

I got some provisional veneers made up for my 4 upper front teeth. After 3 months of re-bonding them as they came off every couple of days or more than once in 1 day, they were no longer viable. A new set has been made. My dentist insists that there is no such thing as a provisional cement, meant to hold for a try-in period, a week or so. She says only temporary cement good for a couple of hours, or permanent. Permanent could mean temps have to be ground off, defeating their whole purpose