The maximum class size for those students whose special education needs consist primarily of the need for specialized instruction which can best be accomplished in a self-contained setting cannot exceed 15 students (15:1), or 12 students in a State-operated or State-supported school (12:1), except that:
The permanent crown will fit, look, and feel better than the temporary after all the proper and necessary adjustments has been made. Most dentists will check your bite when the temporary is out and again when the permanent crown is in place (not cemented yet). The two should feel the same.
All of the temporary cement is removed from the tooth, and the tooth is completely dried. Your dentist will then try the permanent crown on the tooth. Using a piece of dental floss, your dentist will also check the contacts in between the crown and adjacent teeth to ensure there is an ideal contact between the teeth.