Maxillary first premolar angular differences between North American Indians and non‐North American Indians

Morris, Donald H.

doi:10.1002/ajpa.1330540317

Cited by 28 publications

(7 citation statements)

References 2 publications

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“…In terms of geographic regions, a large percentage of dental studies have focused on Arctic Aleut-Eskimos and Indian groups of the American Southwest. Considering just the Southwest, data on dental metrics and morphology have been obtained from samples of both skeletal (Nelson, 1938;Snyder, 1959;Morris, 1965;Turner, 1969;Larson, 1978;Coyne, 1981) and living (Kraus, 1959;Morris, 1965Morris, , 1967Morris, , 1981Morris et al, 1978;Dahlberg, 1963;Snyder et al, 1969;Sofaer et al, 1972;Scott, 1973Scott, , 1977Scott and Dahlberg, 1982) populations.…”

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confidence: 99%

The dental morphology of Pima Indians

Scott

Potter

Noss

et al. 1983

American J Phys Anthropol

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Fourteen morphologic crown traits were observed in a sample of 1528 Pima Indians of south-central Arizona. Pima dentitions are characterized by high frequencies of shoveling, incisor winging, the hypocone, the lower canine distal accessory ridge, cusp 6, and the protostylid. They exhibit low frequencies of the metaconule and lower premolar multiple lingual cusps and moderate frequencies of the canine tubercle, Carabelli's trait, cusp 7, and lower second molars with four cusps and X groove patterns. When Pima crown trait frequencies were compared to those of 13 Southwest Indian samples, their closest affinities were to other Uto-Aztecan groups, the Papago and Hopi. The Pima are most divergent from Athapaskans and are also clearly removed from Yuman speaking groups and the Zuni. In general, the pattern of dental morphologic variation in the Southwest corresponds closely to linguistic divisions.

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mentioning

confidence: 99%

The dental morphology of Pima Indians

Scott

Potter

Noss

et al. 1983

American J Phys Anthropol

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“…For both cases, the diagnostic pit on the distal border between the two major cusps is highlighted by an arrow. In Figure 3, Individual A from the Kaposszentjakab site dates to the 14th-15th centuries; cusp rotation is not as pronounced as in the cases from Figure 2, but it still reaches 21 , about three times that of an average European (Morris, 1981). It also has the diagnostic distal pit highlighted by an arrow.…”

Section: Hungarian Examplesmentioning

confidence: 89%

“…For UP1, the distal lobe of the buccal cusp rotates away from the primary axis of the maxilla. Morris (1981) measured this angle by drawing one line through the sagittal sulcus and another along the main axis of the buccal cusp. For Southwest Native Americans, the average angle was between 9° and 11°.…”

Section: Methodsmentioning

confidence: 99%

Multiple occurrences of the rare Uto‐Aztecan premolar variant in Hungary point to ancient ties between populations of western Eurasia and the Americas

Scott

Dern

Évinger

et al. 2022

Intl J of Osteoarchaeology

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The Uto-Aztecan premolar (UAP) is a rare dental morphological variant long thought to be restricted to non-Arctic Native Americans. The recent discovery of four individuals with this trait in a Hungarian sample invites reassessment of its geographic distribution.Our goal is to assess the variation of this trait on a global level and provide an explanation for its distribution. Observations on over 300 medieval Hungarian dentitions, along with data from the C.G. Turner II database, provide the authors with a global perspective on the distribution of UAP. In addition to four instances of UAP from Hungary, additional European cases have been reported from Germany, Spain, Yugoslavia, and France.Although the trait is most common in non-Arctic Native Americans, it is absent in Africa, Arctic America, the Pacific, and Asia with a few isolated and problematic exceptions.Most papers on UAP have focused on the trait's presence in the Americas with some authors suggesting a possible New World mutation. Although rare outside of the Americas, four examples from Hungary, in addition to other reported cases from Europe, suggest a more complex history of the UAP. Recent paleogenomic research indicates that direct gene flow from a west Eurasian lineage to an Ancient Native American population may have taken place after their divergence from the ancestral Arctic Native American population (Ancient Paleo-Siberians), thus explaining its current distribution among Europeans and non-Arctic Native Americans.

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“…These methods are limited to providing tooth size and are inherently incapable of detecting variations in tooth shape, form, and surface topography [ 10 ]. The establishment of more detailed methods has included identifying more landmarks on teeth, [ 11 , 12 ] introducing angles within teeth, [ 13 ] and the use of occlusal polygons [ 14 , 15 ]. A significant development was the combined use of high-definition photographs and computer technology [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Morphometric analysis of tooth morphology among different malocclusion groups in a hispanic population

Alsaigh

Alrashdi

2023

BMC Oral Health

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Background There have been reports of unique dental morphological features amongst Latin American and Hispanic populations, and this might invalidate the use of current orthodontic diagnostic tools within this population. There are no tooth size/tooth ratio normative standards for the Hispanic population, despite overwhelming evidence about differences in tooth size between racial groups. Objective This study aimed to determine whether there are significant differences in 3-D tooth shape between patients with Angle Class I, Class II, and Class III dental malocclusion in the Hispanic population. Methodology Orthodontic study models representing Hispanic orthodontic patients with Angle Class I, II, and III dental malocclusions scanned using an intra-oral scanner. The scanned models were digitized and transferred to a geometric morphometric system. Tooth size shape were determined, quantified, and visualized using contemporary geometric morphometric computational tools using MorphoJ software. General Procrustes Analysis (GPA) and canonical variates analysis (CVA) used to delineate the features of shape that are unique to each group. Result The study revealed differences in tooth shape between the different dental malocclusion groups on all twenty-eight teeth that were studied; the pattern of shape differences varied between the teeth and the dental malocclusions. The MANOVA test criteria, F approximations, and P-values show that shape in all the groups was significantly different < 0.05. Conclusion This study revealed differences in tooth shape between the different dental malocclusions on all teeth, and the pattern of shape differences varied between the different dental malocclusions group.

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Maxillary first premolar angular differences between North American Indians and non‐North American Indians

Cited by 28 publications

References 2 publications

The dental morphology of Pima Indians

The dental morphology of Pima Indians

Multiple occurrences of the rare Uto‐Aztecan premolar variant in Hungary point to ancient ties between populations of western Eurasia and the Americas

Morphometric analysis of tooth morphology among different malocclusion groups in a hispanic population

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