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An ectopic maxillary canine is a canine which is following abnormal path of eruption in the maxilla. An impacted tooth is one which is blocked from erupting by a physical barrier in the path of eruption.
The right deciduous maxillary canine is known as "C" and the left one "H". In international notation, the right deciduous maxillary canine is known as "53" and the left one "63". In the universal system of notation, the permanent maxillary canines are referred to by numbers. The right permanent maxillary canine is known as "6" and the left "11".
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.
Very rare case of vertical premolar impaction: the permanent second premolar on the lower right side of the mouth is impacted, inverted and pierces the mandibular bone. Notice that the deciduous second molar is also present, which is uncommon because the patient is a 37-year-old man.
The most frequently involved tooth is the mandibular third molar followed by the maxillary canine, but they may be associated with supernumerary or ectopic tooth. Any permanent tooth can be involved. Regezi and Sciubba [ 6 ] stated that the impacted teeth were most commonly seen in the third molar and maxillary canine teeth, and hence ...
In the primary dentition the teeth reported as most likely to be missing are the lateral incisors, both maxillary and mandibular. [91] [90] If a deciduous tooth is missing this will increase the risk of an absent successor. [92] In the permanent dentition third molars are most commonly absent, and one study [92] found prevalence rates of ...
The cusp of Carabelli, Carabelli's tubercle, or tuberculum anomale of Georg Carabelli is a small additional cusp at the mesiopalatal line angle of maxillary first molars.This extra cusp is usually found on the secondary maxillary first molars and is rarely seen on primary maxillary second molars even less likely on other molars. [1]
The most likely causative tooth is the maxillary canine or maxillary first premolar. [1] This occurs when pus (e.g. from a periapical abscess), perforates the buccal cortical plate of the maxilla above the level of attachment of the levator anguli oris muscle. This is more likely if the tooth root is long (the maxillary canine has the longest ...