Dental size variability in Central African Pygmy hunter‐gatherers and Bantu‐speaking farmers

Romero, Alejandro; Ramírez‐Rozzi, Fernando; Pérez‐Pérez, Alejandro

doi:10.1002/ajpa.23458

Cited by 14 publications

(42 citation statements)

References 44 publications

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“…Tooth size in Pygmies does not differ from that in other populations, and for some dimensions, teeth in Pygmies are in fact larger than in non-Pygmies (Romero et al 2018). This indicates an intraspecies relationship; since similar tooth dimensions correspond to very dissimilar body sizes, an absence of correlation between these two sets of variables would be expected for our species.…”

Section: Introductionmentioning

confidence: 54%

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Tooth dimensions and body size in a Pygmy population

Rozzi

Romero

2019

Annals of Human Biology

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Background: The relationship between tooth size and stature has been analyzed extensively at the interspecies level but has received less attention at the intraspecies level. The relationship between these two parameters does not seem to be the same among modern human populations. Aim: The aim of this study is to analyze the relationship between tooth dimensions and body measurements in the Baka pygmies. Subjects and methods: Height, weight and tooth dimensions were obtained for 45 adult Baka females and 17 males from Le Bosquet (Cameroon). Correlations were obtained between the variables and compared to results for other human populations. Results: The Baka population is distinctive in the small number of significant correlations. Only two bucco-lingual diameters among Baka females show any significant correlation with height. The lack of significant correlations between tooth dimensions and body dimensions among the Baka means that changes in body size are accompanied by random variations in tooth dimensions. Conclusion: These lack of correlations may be accounted for by the impact of environmental effects on the somatic growth of the Baka producing a pygmy phenotype adapted to live in the forest. It is worth noting that many correlations become significant when sexes are pooled.

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Section: Introductionmentioning

confidence: 54%

“…Maximum mesiodistal (MD) and buccolingual (BL) crown dimensions (in mm) were obtained from casts for both I 1 -M 2 and I1-M2. Teeth from left side were measured using a needle-point Helios-Preisser (Germany) digital caliper (0.01-mm precision) (Romero et al 2018).…”

Section: Methodsmentioning

confidence: 99%

Tooth dimensions and body size in a Pygmy population

Rozzi

Romero

2019

Annals of Human Biology

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“…Several studies have shown significant inter‐population variations in both metric and non‐metric measurements, and in the degree of sexual dimorphism in such measurements (Ateş et al, ; Brook et al, ; Garn et al, ; Guatelli‐Steinberg, Sciulli, & Betsinger, ; Hanihara, ; Hanihara & Ishida, ; Harris, Hicks, & Barcroft, ; Peckmann et al, ; Pereira, Bernardo, Pestana, Santos, & Mendonça, ; Pilloud, Hefner, Hanihara, & Hayashi, ; Romero, Ramirez‐Rozzi, & Pérez‐Pérez, ; Yong et al, ; Zorba et al, ). Saunders et al () suggested that the degree of sexual dimorphism in relative measures of dental tissue proportions may remain constant across tooth types and populations, despite variation in overall tooth crown size between males and females, but there is currently little data on this question.…”

Section: Discussionmentioning

confidence: 99%

Sexual dimorphism of dental tissues in modern human mandibular molars

Sorenti

Martinón‐Torres

Martín‐Francés

et al. 2019

American J Phys Anthropol

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Objectives: Previous studies have revealed that human permanent dental tissue proportions differ significantly between males and females, with females having relatively thicker enamel relative to overall crown area than males. The aims of this study are to investigate sexual dimorphism in permanent mandibular molars and to determine whether such differences can be used to estimate sex in modern humans reliably. Materials and Methods:The permanent mandibular molars used in this study (n = 51) originate from 36 individuals of known sex from a Spanish anthropological collection. Eight variables were assessed from two-dimensional (2D) mesial planes of section obtained from microtomographic scans. Binary stepwise logistic regression was then applied to the data.Results: Male molars possess significantly greater quantities of dentine than females, both absolutely and proportionally. Females differed significantly from males by having greater relative enamel thickness. Logistic regression identified the proportion of dentine (relative dentine area [RDA]) as the most important sex discriminator, which can be used to correctly classify specimens with an overall accuracy rate of 74.36%.Discussion: These results confirm that sexual dimorphism in mandibular molar size is a result of males having a greater amount of dentine, both absolutely and proportionally. The findings suggest that 2D measurements of RDA may be useful for sex determination, although further research is required to test the reliability of these predictive techniques across different populations.K E Y W O R D S dental anthropology, dental tissue proportions, enamel thickness, microtomography, molars

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“…Dental measurements were then converted into shape variables by dividing each measurement by the geometric mean for all the measurements in each individual (Jungers, Falsetti, & Wall, ). This standardization procedure removes gross size from the data in order to assess differences in the proportionate contribution of individual variables to overall tooth size (Harris & Lease, ; Hemphill, , ; Irish, Hemphill, de Ruiter, & Berger, ; Irish & Kenyhercz, ; Paul et al, ; Romero, Ramirez‐Rozzi, & Pérez‐Pérez, ; Scherer, ). Furthermore, this procedure adjusts for size differences between individuals that may result from sexual dimorphism.…”

Section: Methodsmentioning

confidence: 99%

Population history of southern Italy during Greek colonization inferred from dental remains

Rathmann

Kyle

Nikita

et al. 2019

American J Phys Anthropol

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Objectives:We are testing competing scenarios regarding the population history of the ancient Greek colonization of southern Italy using dental phenotypic evidence. Materials and Methods:We collected dental metric and nonmetric trait data for 481 human skeletons from six archaeological sites along the Gulf of Taranto, dating to pre-colonial (900-700 BC) and post-colonial periods (700-200 BC). We are evaluating scenarios through an individual-level biodistance analysis using a three-pronged approach: (a) by analyzing levels of mobility in pre-and post-colonial periods under a model of isolation-by-distance; (b) by quantifying differences in group means and variances in pre-and post-colonial periods utilizing permutational multivariate analysis of variance and Betadisper analyses; and (c) by identifying ancestries of post-colonial individuals using naïve Bayes classification. Results: Southern Italy during pre-colonial times was characterized by low levels of mobility and marked differences in group means and variances. During post-colonial times, mobility increased and there were no differences in group means and variances. About 18% of the people in post-colonial times were of Greek ancestry and lived equally distributed across Greek colonies and indigenous villages. Nevertheless, the overall biological composition and variability of southern Italy remained relatively unchanged across pre-and post-colonial periods. Discussion: Our results support a scenario in which only few Greek colonists migrated to southern Italy and lived in smaller numbers alongside indigenous people in Greek colonies as well as in indigenous villages. Our results contradict a scenario in which large numbers of Greek invaders founded biologically isolated and substantially homogeneous colonial enclaves within conquered territories.

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Dental size variability in Central African Pygmy hunter‐gatherers and Bantu‐speaking farmers

Cited by 14 publications

References 44 publications

Tooth dimensions and body size in a Pygmy population

Tooth dimensions and body size in a Pygmy population

Sexual dimorphism of dental tissues in modern human mandibular molars

Population history of southern Italy during Greek colonization inferred from dental remains

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