Photos of Pericoronits / Operculitis effecting Lower Jaw Wisdom Teeth
Pericoronitis is an inflammatory reaction of the operculum (this is the dense, fibrous flap that covers about 50% of the biting surface of a completely or partially erupted lower jaw wisdom tooth) covering an erupting or impacted tooth, usually the lower wisdom tooth.
Poor oral hygiene
Occlusal trauma to the operculum (i.e. the operculum is bitten on by upper jaw molars)