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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 ...
The fusion may be complete (involves crown and root) or partial (involves only the crown), depending on the stage of tooth development when the teeth started to fuse. Tooth fusion is difficult to distinguish from tooth gemination, thus, both conditions are often referred to together as “double teeth”. [1] Double teeth can cause other dental ...
As a tooth is forming, a force can move the tooth from its original position, leaving the rest of the tooth to form at an abnormal angle. Cysts or tumors adjacent to a tooth bud are forces known to cause dilaceration, as are primary (baby) teeth pushed upward by trauma into the gingiva where it moves the tooth bud of the permanent tooth.
The fusion of two deciduous teeth. Gemination occurs when a developing tooth incompletely splits into the formation of two teeth. Fusion is the union of two adjacent teeth during development. Concrescence is the fusion of two separate teeth only in their cementum.
Dental concrescence between a 2M (erupted) and a higher 3M (retained) 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 ...
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.
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.
The dental lamina is a band of epithelial tissue seen in histologic sections of a developing tooth. [1] [2] The dental lamina is first evidence of tooth development and begins (in humans) at the sixth week in utero or three weeks after the rupture of the buccopharyngeal membrane. It is formed when cells of the oral ectoderm proliferate faster ...
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