Para. 1 - The Relationship Between Special and Regular School Programs. Special education is an integral part of the total educational enterprise, not a separate order. In any school system, special education is a means of enlarging the capacity of the system to serve the educational needs of all children.
The purity of dental gold is usually 16 karat, but it is slightly more complicated to recycle than jewelry because it may include nonmetal content like tooth enamel or porcelain. The recycler will use a process like acid reduction or reverse electroplating to extract the gold from the nonmetal elements.
Gold may also be the least reactive metal of all the metals used in dental restorations, but some patients can still be sensitive to a gold crown even if they do not have a specific gold allergy. All gold restorations are alloys, meaning that the gold is mixed with other metals to give it added strength.