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[17] [18] If any primary teeth are shed or lost before permanent teeth are ready to replace them, some posterior teeth may drift forward and cause space to be lost in the mouth. [19] [20] This may cause crowding and/or misplacement once the permanent teeth erupt, which is usually referred to as malocclusion.
The erupting permanent teeth cause root resorption, where the permanent teeth push on the roots of the primary teeth, causing the roots to be dissolved by odontoclasts (as well as surrounding alveolar bone by osteoclasts) and become absorbed by the forming permanent teeth. The process of shedding primary teeth and their replacement by permanent ...
A young boy after losing two baby teeth, exfoliated in response to the permanent teeth beneath, which will erupt through the gums to take their place. Normal loss of primary teeth typically begins around age six and continues until age twelve. The upper and lower central incisors are shed at age six to seven years. The upper and lower lateral ...
When at least 3 teeth are affected, it is referred to as multiple idiopathic cervical root resorption. The causes of external cervical root resorption are poorly understood but trauma, periodontal treatment, and/or tooth whitening may be predisposing factors. [16]
Failure of eruption of teeth happens when a single or multiple teeth fail to erupt in the mouth. This can happen due to many reasons which may include obstruction from primary teeth, bone surrounding the unerupted tooth or other mechanical factors. The two types of failure of eruption are primary failure of eruption and mechanical failure of ...
When primary teeth are near exfoliation (shedding of primary teeth) there will inevitably be an increase in mobility. Exfoliation usually occurs between the ages of six and thirteen years. It usually starts with the lower anterior teeth (incisors); however, exfoliation times of the primary dentition can vary.
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During primary dentition, the tooth buds of permanent teeth develop below the primary teeth, close to the palate or tongue. Mixed dentition starts when the first permanent molar appears in the mouth, usually at six years, and lasts until the last primary tooth is lost, usually at eleven or twelve years. [47]
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