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Impacted wisdom teeth are classified by the direction and depth of impaction, the amount of available space for tooth eruption, and the amount of soft tissue or bone (or both) that covers them. The classification structure helps clinicians estimate the risks for impaction, infections and complications associated with wisdom teeth removal. [6]
Teeth may become impacted because of adjacent teeth, dense overlying bone, excessive soft tissue or a genetic abnormality. Most often, the cause of impaction is inadequate arch length and space in which to erupt. That is the total length of the alveolar arch is smaller than the tooth arch (the combined mesiodistal width of each tooth).
A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons (the sheaths of tissue that connect bones to muscles) where a great deal of pressure is generated in a joint. The sesamoid bones protect tendons by helping them overcome compressive forces.
The rigidity may be complete or partial and may be due to inflammation of the tendinous or muscular structures outside the joint or of the tissues of the joint itself. [1] When the structures outside the joint are affected, the term "false ankylosis" has been used in contradistinction to "true ankylosis", in which the disease is within the joint.
Pulp necrosis is a clinical diagnostic category indicating the death of cells and tissues in the pulp chamber of a tooth with or without bacterial invasion. [1] It is often the result of many cases of dental trauma, caries and irreversible pulpitis.
Normally, bone continuously breaks down and rebuilds—old bone is resorbed and replaced with new bone. The process keeps the skeleton strong and helps it to maintain a balance of minerals. [ 23 ] In the course of avascular necrosis, however, the healing process is usually ineffective and the bone tissues break down faster than the body can ...
Impaction may refer to: Impaction (animals), blockage of the digestive tract of animals; Fecal impaction, a solid, immobile bulk of feces or indigestible matter that can develop in the rectum; Dental impaction, the failure of a tooth fully to erupt into the mouth because of obstruction from another tooth; Aerosol impaction
Tooth impaction: these can cause resorption of adjacent teeth and other pathologies for example a dentigerous cyst formation. Psychosocial wellbeing: malocclusions of teeth with poor aesthetics can have a significant effect on self-esteem.