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Molar incisor hypomineralisation (MIH) is a type of enamel defect affecting, as the name suggests, the first molars and incisors in the permanent dentition. [1] MIH is considered a worldwide problem with a global prevalence of 12.9% and is usually identified in children under 10 years old. [2]
A Mesio-impacted, partially erupted mandibular third molar, B Dental caries and periodontal defects associated with both the third and second molars, caused by food packing and poor access to oral hygiene methods, C Inflamed operculum covering partially erupted lower third molar, with accumulation of food debris and bacteria underneath, D The upper third molar has over-erupted due lack of ...
Impacted wisdom teeth is a condition where the third molars (wisdom teeth) are prevented from erupting into the mouth. [1] This can be caused by a physical barrier, such as other teeth, or when the tooth is angled away from a vertical position. [2]
In the permanent dentition third molars are most commonly absent, and one study [92] found prevalence rates of between 20–22%. When third molars are ignored the prevalence rate for each tooth varies from study to study. [6] In Caucasian studies mandibular second premolars and maxillary lateral incisors are most often absent. [6]
Mulberry molars are first molars, and have many small cusps, rather than the standard four. Both the incisors and molars demonstrate enamel thinning and discoloration. [13] Eighth nerve deafness typically starts with high-frequency hearing loss between eight and ten years old, but can start at a younger age. [7]
That is the total length of the alveolar arch is smaller than the tooth arch (the combined mesiodistal width of each tooth). The wisdom teeth (third molars) are frequently impacted because they are the last teeth to erupt in the oral cavity. Mandibular third molars are more commonly impacted than their maxillary counterparts.
Diseases may cause periodontal disease or bone loss to prompt tooth loss. Consequently, periodontal disease may cause increased infection, which may predispose a person to other diseases. Diseases commonly related to tooth loss include, but are not limited to: cardiovascular disease, [10] cancer, [11] osteoporosis [12] and diabetes mellitus. [13]
First molars (4) at approximately 14 months; Canines (4) at approximately 18 months; Second molars (4) at approximately 2–3 years; Milk teeth tend to emerge sooner in females than in males. The exact pattern and initial starting times of teething appear to be hereditary. [10] When and how teeth appear in an infant has no bearing on the health ...