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.
1 2. 2  Inlays â¢ Inlays are most commonly made of different types of woods and in varying colors. â¢ 3  Inlays can also be made with bone, ivory, brass, mother-of-pearl, pewter and tortoise shell.