I have had my dental implant trays actual teeth break away 4 times in 10 months. I am have continual problems with them . I will say that the Glidewell Corporation cares little about the people that receive their final product for placement. In all I would suggest that you research who your dentist will be using for the final manufacture of the actual tray of teeth place after your implants have healed and are ready for the final placement of the tray.