While lichen planus very rarely leads to oral cancer, irritation of lichen planus by tobacco and alcohol, poorly fitting dentures, and poor oral hygiene can turn lichen planus into the erosive type.
In economics, a deadweight loss (also known as excess burden or allocative inefficiency) is a loss of economic efficiency that can occur when equilibrium for a good or service is not achieved or is not achievable.he deadweight loss is the area of the triangle formed by the grey tax income box (to the right of it), the original supply curve, and the demand curve.
This graph shows a price ceiling. P* shows the legal price the government has set, but MB shows the price the marginal consumer is willing to pay at Q*, which is the quantity that the industry is willing to supply. Since MB > P* (MC), a deadweight welfare loss results. P' and Q' show the equilibrium price.