The dental morphology of Pima Indians

Scott, G. Richard; Potter, Rosario H. Yap; Noss, John F.; Dahlberg, Albert A.; Dahlberg, Thelma

doi:10.1002/ajpa.1330610103

Cited by 87 publications

(44 citation statements)

References 34 publications

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“…A lower MMD value indicates greater similarity and vice versa. It is assumed that phenetic similarity approximates cladistic relationship (Sokal and Sneath, 1963;Scott et al, 1983). Twenty-seven samples were compared on the basis of all 36 traits.…”

Section: Methodsmentioning

confidence: 99%

Characteristic high- and low-frequency dental traits in sub-Saharan African populations

Irish

1997

Am. J. Phys. Anthropol.

152

101

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In an earlier investigation (Irish [1993] Biological Affinities of Late Pleistocene Through Modern African Aboriginal Populations: The Dental Evidence [Ann Arbor: University Microfilms]), biological affinities of 32 sub-Saharan and North African dental samples were estimated using comparative analyses of 36 dental morphological traits. Marked dental homogeneity was revealed among samples within each of the two geographic regions, but significant interregional differences were noted. Assuming dental phenetic expression approximates or is an estimate of genetic variation, the present study of 976 sub-Saharan-affiliated Africans indicates they are not closely related to other world groups; they are characterized by numerous morphologically complex crown and root traits. Turner ([1984] Acta Anthropogenetica 8:23-78; [1985] in R Kirk and E Szathmary (eds.): Out of Asia: Peopling the Americas and the Pacific [Canberra: The Journal of Pacific History], pp. 31-78; [1990] Am. J. Phys. Anthropol. 82:295-318; [1992] Persp. Hum. Biol. 2/Archaeol. Oceania 27:120-127; [1992] in T Akaszawa, K Aoki, and T Kimura (eds.): The Evolution and Dispersal of Modern Humans in Asia [Tokyo: Hokusen-Sha Publishing Co-], pp. 415-438) reports that Northeast Asian/New World sinodonts also have complex teeth relative to Europeans, Southeast Asian sundadonts, Australian/Tasmanians, and Melanesians. However, sinodonty is characterized by UI1 winging, UI1 shoveling, UI1 double shoveling, one-rooted UP1, UM1 enamel extension, M3 agenesis, and three-rooted LM1. Sub-Saharan peoples exhibit very low frequencies of these features. It is proposed that the collection of dental traits which best differentiate sub-Saharan Africans from other worldwide samples includes high frequencies of the Bushman Canine, two-rooted UP1, UM1 Carabelli's trait, three-rooted UM2, LM2 Y-groove pattern, LM1 cusp 7, LP1 Tome's root, two-rooted LM2, UM3 presence, and very low incidences of UI1 double shoveling and UM1 enamel extension. This suite of diagnostic traits is termed the sub-Saharan African dental complex.

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Section: Methodsmentioning

confidence: 99%

Characteristic high- and low-frequency dental traits in sub-Saharan African populations

Irish

1997

Am. J. Phys. Anthropol.

152

101

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“…That is, the Mexican populations have more dental characters with frequencies similar to Sundadonts than Sinodonts, and overall they fit the Sundadont pattern described by Turner. Relative to other populations of American Indians (Dahlberg, 1949;Hrdlicka, 1931;Scott et al, 1983;, the Mesoamerican groups in this study have a low frequency of the almost universal trait for the Sinodont pattern, shoveling of upper incisors. This low frequency is also found in the Inuit of the Central Arctic (Mayhall, 1979).…”

Section: Monte Alban4mentioning

confidence: 76%

“…Previous studies have shown that American Indian populations follow the Sinodont pattern (Scott et al, 1983;Turner, 1983Turner, , 1985aTurner, , 1986a. The results of the discriminant analysis performed indicate that certain New World populations show frequencies of dental traits most consistent with the Sundadont pattern, suggesting extensive dental morphological variation among American Indians.…”

Section: Monte Alban4mentioning

confidence: 98%

“…Dental morphological traits are, for the most part, expressed independently of each other, and only shovelingldouble shoveling and Carabelli's trait/protostylid have been shown to be moderately correlated (Scott et al, 1983;Turner, 1987). Because of intertrait correlation, only the key teeth (I' for shoveling and M' for Carabelli's trait) were included in the statistical analyses of these traits.…”

Section: Samples and Morphological Variables Scoredmentioning

confidence: 99%

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Dental variation among four prehispanic Mexican populations

Haydenblit

1996

Am. J. Phys. Anthropol.

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In this paper, the dental morphology of prehispanic Meso-american populations is described, compared, and examined within the context of New World dental variation. Twenty-eight morphological dental traits were studied and compared in four samples of prehispanic Mexican populations. After eliminating intra- and interobserver error, the dental morphological characteristics observed show evidence of heterogeneity among the populations. In particular, the oldest population, Tlatilco (1300-800 BC), was significantly different from the other three groups, Cuicuilco (800-100 BC), Monte Albán (500 BC-700 AD) and Cholula (550-750 AD). When the four samples were compared to other Mongoloid populations, either univariately or multivariately, it was observed that the Mexican groups did not follow a strict Sinodont (characteristic of Northeast Asia)/Sundadont (characteristic of Southeast Asia) classification (Turner [1979] Am. J. Phys. Anthropol. 51:619-636). From the traits examined, 27% presented frequencies consistent with Sinodont variation, while 73% of the traits showed similar incidence to Southeast Asian groups. Multivariately, the Mexican populations were found to fit an overall Sundadont classification. These results indicate that there is more dental morphological variation among American Indian populations than previously shown.

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“…The aetiology of the rotation could not be identified, as the patient did not have any orofacial deformities which are the possible aetiological factors for the presence of rotated tooth [6]. The clinical examinations of his parents and sibling did not reveal any malformed teeth.…”

Section: Discussionmentioning

confidence: 90%

The Aesthetic Management of a 180 Degree Rotated Maxillary Central Incisor With Two Root Canals- A Case Report

Jain

Narang²,

Sharma³

et al. 2013

JCDR

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The success of the root canal treatment is based on a thorough knowledge of the normal tooth, the root and the root canal morphology, which include variations. Tooth rotation is a common finding in the premolar-molar region, but a 180 degree rotation of the maxillary central incisor is extremely rare and it has not documented anywhere in the dental literature. This case report describes the aesthetic correction of a maxillary central incisor with a 180 degree rotation and two root canals.

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The dental morphology of Pima Indians

Cited by 87 publications

References 34 publications

Characteristic high- and low-frequency dental traits in sub-Saharan African populations

Characteristic high- and low-frequency dental traits in sub-Saharan African populations

Dental variation among four prehispanic Mexican populations

The Aesthetic Management of a 180 Degree Rotated Maxillary Central Incisor With Two Root Canals- A Case Report

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