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.
Your dentist might discuss with you the best type of inlay or onlay material to use. If esthetics is not a concern (for example, with back molars), gold is the best option. Porcelain inlays and onlays offer the best esthetics and are often used in the smile line areas. Resin materials may be the best option for people who grind their teeth and/or those with a misaligned bite (malocclusion). During your second visit, the provisional temporary is removed and your inlay or onlay is placed.