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Concrescence is an uncommon developmental condition of teeth where the cementum overlying the roots of at least two teeth fuse together without the involvement of dentin. [ 1 ] [ 2 ] Usually, two teeth are involved with the upper second and third molars being most commonly fused together. [ 3 ]
Mader’s “two-tooth” rule can help distinguish between tooth fusion and gemination. If the double tooth is counted as two teeth and the number of teeth in the mouth is normal, then the double tooth is likely a fused tooth. However, in some rare cases a tooth is fused to an extra tooth in which case counting the double tooth as two teeth ...
Tooth ankylosis refers to a fusion between a tooth and underlying bony support tissues. In some species, this is a normal process that occurs during the formation or maintenance of the dentition. [1] By contrast, in humans tooth ankylosis is pathological, whereby a fusion between alveolar bone and the cementum of a tooth occurs.
Discoloured teeth - teeth may be amber, brown, blue or opalescent; Bulbous shape to the tooth crown due to cervical constriction; Tooth wear/Non-carious tooth surface loss (NCTSL) - due to the poorly mineralised dentine, the enamel of the tooth is unsupported and subsequently shears or chips off as it is subjected to biting forces. This exposes ...
Occasionally, additional teeth may also arise from developmental anomalies like fusion or gemination. Fusion occurs when two tooth buds fuse together, creating a single, larger tooth. Gemination involves the incomplete division of a single tooth bud into two teeth. In some cases, these anomalies may take the form of the appearance of extra teeth.
Double teeth are more common in primary teeth with a prevalence of 0.5 - 0.7%, but can occur in permanent teeth. [1] Unlike tooth fusion, tooth gemination is more common in the maxillary incisors and canines. [3] [4] [5] Like tooth gemination, tooth fusion is more common in the anterior teeth (incisors and canines). Double teeth affect both ...
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In young children many cases of dilaceration occur due to some kind of trauma to the tooth, commonly causing dislocation of the tooth affecting its direction and growth. [10] Once a trauma has occurred dilaceration can be prevented by yearly visits to the dentist and maintaining radiographic images to note any changes that may occur.