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Because impacted teeth do not erupt, they are retained throughout the individual's lifetime unless extracted or exposed surgically. 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.
Ankylosis of deciduous teeth may rarely occur. The most commonly affected tooth is the mandibular (lower) second deciduous molar. Partial root resorption first occurs and then the tooth fuses to the bone. This prevents normal exfoliation of the deciduous tooth and typically causes impaction of the permanent successor tooth.
Deep A, Thakur S, Jayam C. An interesting case of unilateral multiple impacted unerupted teeth in a young adolescent child: A case report and discussion. J Nat Sc Biol Med 2021;12:256‑9. (PDF) An interesting case of unilateral multiple impacted unerupted teeth in a young adolescent child: A case report and discussion.
Impacted wisdom teeth are classified by their direction of impaction, their depth compared to the biting surface of adjacent teeth and the amount of the tooth's crown that extends through gum tissue or bone. Impacted wisdom teeth can also be classified by the presence or absence of symptoms and disease. Screening for the presence of wisdom ...
Whatever the cause of the double tooth (fusion or gemination), management depends on the morphology of the crown, root, & endodontic system, the type of dentition (primary or permanent), and the orthodontic (e.g. crowding, malocclusion, ectopic eruption or impaction of adjacent teeth), periodontal, esthetic, & other functional concerns. [1]
Dental cavity, also known as tooth decay, [a] is the breakdown of teeth due to acids produced by bacteria. [6] The resulting cavities may be a number of different colors, from yellow to black. [1]
Overall, a partial government shutdown would stop all work for about 20% of the government and delay paychecks to impacted workers in agencies like the Department of Agriculture and air traffic ...
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.