shovel-shaped incisor

sho·vel-shaped in·ci·sor

(shŏv'ĕl-shāpt in-sī'zŏr)
A tooth in which the lingual, and occasionally the labial, marginal ridges are accentuated; more highly developed in people of Asian origin.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

sho·vel-shaped in·ci·sor

(shŏv'ĕl-shāpt in-sī'zŏr)
Incisor in which lingual, and occasionally labial, marginal ridges are accentuated; more highly developed in people of Asian origin.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Shovel-shaped incisor, a morphological variation on the palatine face of the superior incisor with variable expression, is a trait of Asian origin.
The estimation of genetic mixture was determined based on frequency of shovel-shaped incisor and Carabelli's cusp, using the Berstein method and assuming a population of mixed Amerindian and Caucasian origin (Cavalli-Sforza & Bodmer).
The researchers noted just around the same time when the mutation was spreading, Native Americans and northeast Asians started developing shovel-shaped incisors (with ridges along the sides and biting edge), something that has only been found in people belonging to the two groups.
In fact, they noted almost 100 percent of the early Native Americans and 40 percent of modern-day East Asians had shovel-shaped incisors back in the day.
William King Gregory (1922:476) opined: "Apart from a few striking cases, presently to be noted, racial characters in the teeth are at most not very conspicuous." The traits he considered variable enough to be noted included shovel-shaped incisors, upper molar cusp number, lower molar cusp number, Dryopithecus pattern, and Carabelli's cusp.
In some ways harkening back to Gregory, the two traits are shovel-shaped incisors, characterizing Asian and Native American groups, and Carabelli's cusp, characterizing European and European-derived populations.
Macrodon- tia shovel-shaped incisors and multituberculism: probable Ekman-Westborg-Julin trait Sep 2012; 79(3): 197-201.
Talon cusp can be found in isolation or in association with other dental anomalies such as peg-shaped lateral incisors, shovel-shaped incisors, bifid cingulum, unerupted canines and the large cusp of Carabelli, dens invagi-natus, supernumeraries and complex odon-tomas (2, 23, 26).
Talon cusps may be associated with other dental anomalies, especially in the permanent dentition, such as peg-shaped lateral incisors, impacted mesiodens and canines, odontoma, macrodontia, dens invaginatus, supernumerary teeth, shovel-shaped incisors, bifid cingulum, additional tubercle on incisors, exaggerated Carabelli cusps, and microdontia of antimere teeth [Al-Omari et al., 1999; Gungor et al., 2000; Segura-Egea et al., 2003].
And he lacked other features, such as shovel-shaped incisors, that are generally associated with Mongoloid people.