Hypersensitivity (also called hypersensitivity reaction or intolerance) is a set of undesirable reactions produced by the normal immune system, including allergies and autoimmunity. They are usually referred to as an over- reaction of the immune system and these reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. They are classified in four groups after the proposal of P. G. H. Gell and Robin Coombs in 1963.
Typically refers to tooth pain that is caused very easily and with a stimulus that normally would elicit no feeling.
A crossbite is often present in childhood and doesn't correct itself as the patient ages. The misalignment can be between the front teeth or back teeth or both, and th