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Shovel-shaped incisors (or, more simply, shovel incisors) are incisors whose lingual surfaces are scooped as a consequence of lingual marginal ridges, crown curvature, or basal tubercles, either alone or in combination.
The genetic mutation behind tooth shoveling—found in two alleles of the EDAR gene—occurred in China some 30,000 years ago and spread through the ancestors of Native Americans and Asians 20,000...
The posterior shovel shape on front upper teeth is found in many eastern northern woodland Natives, but there are also many variations [wider or deeper or more narrow etc.] to this among different tribes that are not woodland Natives of eastern USA.
If your teeth are shovel shaped, meaning the backs of your upper 4 teeth are shaped like a spoon as opposed to straight, then you have this trait. So are you wondering what this might have to do with genetic genealogy?
From the shape of your incisors to the size of your molars, your teeth can provide valuable insights into your genetic heritage. One of the most well-known dental traits associated with ancestry is shovel-shaped incisors. This refers to incisors that have a concave shape on the back, resembling a shovel.
Shovel Teeth. Shovel-shaped incisors (SSIs) have a well-defined elevated enamel border and a noticeable hollow section on the palatal surface of the teeth. Teeth with this extraordinary nature are referred to as "shovel-shaped incisors'' because they resemble a normal coal shovel.
Sinodonty is a particular pattern of teeth characterized by the following features: The upper first incisors and upper second incisors are shovel-shaped , and they are "not aligned with the other teeth".
Possibly not a true anomaly, shovel-shaped incisors are a frequently occurring trait that reflect biologic differences between races. 4 The lingual anatomy includes a pronounced cingulum and marginal ridges that resemble the shape of a “shovel” (Fig. 11-23A). These teeth occur most frequently in Asian, Mongoloid, Arctic, and Native American ...
Shovel shape is the term commonly used to designate incisor teeth that have prominent marginal ridges and a deep fossa on their lingual surfaces (Fig. 2-28).
Shovel-shaped incisors (or, more simply, shovel incisors) are incisors whose lingual surfaces are scooped as a consequence of lingual marginal ridges, crown curvature, or basal tubercles, either alone or in combination.