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Tooth eruption is a process in tooth development in which the teeth enter the mouth and become ... This may cause crowding and/or misplacement once the permanent ...
[2] [3] This type of failure of eruption has a genetic or familial background precursor as a cause. The prevalence is of PFE is about 0.06% in population. In this type of failure, teeth that are non-ankylosed fail to erupt in the mouth. These teeth do not have a precursor tooth that is blocking their path.
Although tooth eruption occurs at different times for different people, a general eruption timeline exists. Typically, humans have 20 primary (baby) teeth and 32 permanent teeth. [43] Tooth eruption has three stages. The first, known as deciduous dentition stage, occurs when only primary teeth are visible. Once the first permanent tooth erupts ...
Overeruption can cause interferences in the occlusion and difficulty when constructing dentures. The alveolar bone typically overgrows, but root surfaces can be exposed to the oral environment increasing likelihood of dental caries. Overerupted teeth are often sharp due to lack of tooth wear (dental attrition) by adjacent teeth during chewing.
Pericoronitis is caused by an accumulation of bacteria and debris beneath the operculum, or by mechanical trauma (e.g. biting the operculum with the opposing tooth). [3] Pericoronitis is often associated with partially erupted and impacted mandibular third molars (lower wisdom teeth), [4] often occurring at the age of wisdom tooth eruption (15-26).
Tooth eruption may be altered by some environmental factors. When eruption is prematurely stopped, the tooth is said to be impacted. The most common cause of tooth impaction is lack of space in the mouth for the tooth. [70] Other causes may be tumors, cysts, trauma, and thickened bone or soft tissue.
Wisdom teeth become impacted when there is not enough room in the jaws to allow for all of the teeth to erupt into the mouth. Because the wisdom teeth are the last to erupt, due to insufficient room in the jaws to accommodate more teeth, the wisdom teeth become stuck in the jaws, i.e., impacted. There is a genetic predisposition to tooth impaction.
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).
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