Phencyclidine (PCP) was originally developed as an anesthetic, but the adverse side effects prevented its use except as a large animal tranquilizer. PCP acts as both a depress â¦ ant and a hallucinogen,and sometimes as a stimulant. It is abused primarily for its variety of mood-altering effects.
1 An inlay- As the name suggests, this restoration sits inside the tooth.  An onlay- In contrast is bonded on top of the tooth, replacing some or all of the cusps of the tooth.
An inlay restoration is a custom made filling made of composite material, gold, or tooth-colored porcelain. Porcelain inlays are popular because they resemble your natural tooth. A porcelain inlay is made by a professional dental laboratory and is permanently cemented into the tooth by your dentist.