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.
Inlays and onlays are fabricated in a dental lab and are then fitted and bonded to the damaged tooth by the dentist. This type of restoration is called an indirect filling because unlike a traditional dental filling they are not molded into place during your dental visit.