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.
Composite inlays are a way to overcome the problem of the traditional composite filling material shrinking in very large cavities - they are quite effective but not widely used. Porcelain Inlays There are different types of porcelain that can be used and they vary in their structure, features and benefits. Most dentists have a particular type that they prefer and commonly use.