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Tooth fusion occurs when at least the dentin of developing tooth germs fuse. When only the cementum (root portion) of teeth is fused, this is known as concrescence. [4] The exact cause of tooth fusion is unknown, but is the result of alterations in embryonic tooth development.
Double teeth are usually larger than normal teeth and have a groove/fold in the enamel on the labial surface that can extend further down the root. In tooth gemination, this groove often symmetrically divides the tooth in half. [6] Mader’s “two-tooth” rule can help distinguish between tooth fusion and gemination.
They can be used in direct restorations to fill in the cavities created by dental caries and trauma, minor buildup for restoring tooth wear (non-carious tooth surface loss) and filling in small gaps between teeth (labial veneer). Dental composites are also used as indirect restoration to make crowns and inlays in the laboratory.
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.
Atraumatic restorative treatment (ART) [1] is a method for cleaning out tooth decay (dental caries) from teeth using only hand instruments (dental hatchet and spoon-excavator) and placing a filling. It does not use rotary dental instruments ( dental drills ) to prepare the tooth and can be performed in settings with no access to dental equipment.
Dental composites. Glass ionomer cement - composite resin spectrum of restorative materials used in dentistry. Towards the GIC end of the spectrum, there is increasing fluoride release and increasing acid-base content; towards the composite resin end of the spectrum, there is increasing light cure percentage and increased flexural strength.
The tooth of choice to replace a tooth missing in the anterior maxillary region is the maxillary second premolars. Poor prognosis first permanent molars can be replaced with third molars Autotransplantation has the best outcome in growing patients with some root development complete but incomplete development at the apex.
Concrescence teeth could be reshaped and replaced with full crowns. If the teeth are having recurrent problems, are non-restorable, or are painful, tooth extraction should be considered to prevent further periodontal destruction leading to tooth loss. [3] [4] [5] However, a consequence of extraction is that the conjoined tooth also must often ...