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.
The temporary crown is also important, but for different reasons. The temporary crown is essential for comfort, appearance and to maintain the position of the adjacent teeth for the permanent crown. When a tooth is shaped for a crown, the more sensitive areas of the tooth are usually exposed. The temporary crown acts as a blanket for the tooth, insulating it from hot and cold foods and drinks. The temporary crown is also needed to help maintain the appearance of the tooth while the permanent crown is being made. A trimmed tooth can be unattractive without the temporary, especially if the tooth is near the front of the mouth.