Tooth Size Variation in Assemblages of Tremacyllus (Hegetotheriidae, Notoungulata): Insights into Geographical Gradients, Systematics, and Sexual Dimorphism

2021 ◽  
Author(s):  
Matías A. Armella
Keyword(s):  
Sexual Dimorphism ◽  
Size Variation ◽  
Tooth Size

scholarly journals Sexual Dimorphism and Tooth Size Variation in the Permanent Dentition of the Uva Bintenna Veddas of Sri Lanka

2014 ◽  
Vol 04 (01) ◽  
pp. 1-6
Author(s):  
Thushari Hewapathirana ◽  
Roshan Peiris ◽  
Deepthi Nanayakkara ◽  
Malkanthi Chandrasekara ◽  
Eugine Wikramanayake
Keyword(s):  
Sexual Dimorphism ◽  
Sri Lanka ◽  
Size Variation ◽  
Permanent Dentition ◽  
Tooth Size

scholarly journals Study of sexual dimorphism and tooth size variation in canines in south indian population

2017 ◽  
Vol 6 (3) ◽  
pp. 2745-2746
Author(s):  
Manthra Prathoshni S ◽  
◽  
Yuvaraj Babu K ◽  
Karthick Ganesh ◽  
◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Indian Population ◽  
Size Variation ◽  
Tooth Size ◽  
South Indian Population ◽  
South Indian

Age related tooth size variation in the Lengua Indians of Paraguay

1985 ◽  
Vol 75 (3) ◽  
pp. 341-348
Author(s):  
Julius A. Kieser ◽  
H. T. Groeneveld ◽  
Charles B. Preston
Keyword(s):  
Size Variation ◽  
Tooth Size ◽  
Age Related

Comparison of Maxillary Central Inclination, Crown Angulation and Tooth Size Variation in Aesthetic and Non-aesthetic Smiles, A Cross Sectional Study

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Tarulatha Revanappa Shyagali ◽  
Rachita Singh ◽  
Anil Tiwari ◽  
Abhishek Gupta
Keyword(s):  
Size Variation ◽  
Cross Sectional Study ◽  
Tooth Size ◽  
Central Incisor ◽  
Cross Sectional ◽  
Maxillary Central Incisor ◽  
Normal Occlusion ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
The Aesthetic

Background: An attractive smile is often attributed to incisor alignment and proclined or retroclined incisors could contribute to a less aesthetic smile. Objectives: This study was aimed to evaluate the maxillary central incisor crown inclination, crown angulation and tooth size variation in aesthetic and unattractive smiles. Methods: This study was conducted among 100 females (equally divided into aesthetic and unaesthetic smile groups), aged between15 - 25 years, with Angle’s Class I normal occlusion and balanced profiles. Variations in maxillary central incisor crown inclination and angulation were measured on lateral cephalograms, photographs and the study models of the subjects. Variations in tooth morphology were also evaluated by measuring crown height and width in both groups. Mann-Whitney U test was performed to evaluate the difference between the aesthetic and unaesthetic smiles. P < 0.05 was considered as significant. Results: This study showed that incisor angulation was significantly higher in the unaesthetic group compared to the aesthetic group (P < 0.001). However, there was no statistically significant difference for the incisor inclination relative to the Palatal Plane between the aesthetic and unaesthetic smile groups (P = 0.086). In addition, there were significant differences between the aesthetic and the non-aesthetic groups regarding the central incisor height (P < 0.05). Conclusions: The findings of this study indicate that the possible variations in aesthetics are related to the ethnic elements that are associated with differences in crown angulations, as well as tooth size.

scholarly journals Tooth Size Variation Related to Age in Amboseli Baboons

2010 ◽  
Vol 81 (6) ◽  
pp. 348-359 ◽  
Author(s):  
Jordi Galbany ◽  
Laia Dotras ◽  
Susan C. Alberts ◽  
Alejandro Pérez-Pérez
Keyword(s):  
Size Variation ◽  
Tooth Size

scholarly journals New footprints from Laetoli (Tanzania) provide evidence for marked body size variation in early hominins

eLife ◽  
2016 ◽  
Vol 5 ◽  
Author(s):  
Fidelis T Masao ◽  
Elgidius B Ichumbaki ◽  
Marco Cherin ◽  
Angelo Barili ◽  
Giovanni Boschian ◽  
...  
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Size Variation ◽  
Single Species ◽  
Australopithecus Afarensis ◽  
Body Size Variation ◽  
Northern Tanzania ◽  
The World ◽  
Marked Body ◽  
Considerable Body

Laetoli is a well-known palaeontological locality in northern Tanzania whose outstanding record includes the earliest hominin footprints in the world (3.66 million years old), discovered in 1978 at Site G and attributed to Australopithecus afarensis. Here, we report hominin tracks unearthed in the new Site S at Laetoli and referred to two bipedal individuals (S1 and S2) moving on the same palaeosurface and in the same direction as the three hominins documented at Site G. The stature estimates for S1 greatly exceed those previously reconstructed for Au. afarensis from both skeletal material and footprint data. In combination with a comparative reappraisal of the Site G footprints, the evidence collected here embodies very important additions to the Pliocene record of hominin behaviour and morphology. Our results are consistent with considerable body size variation and, probably, degree of sexual dimorphism within a single species of bipedal hominins as early as 3.66 million years ago.

scholarly journals Size and Shape: Morphology's Impact on Human Speed and Mobility

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Cara M. Wall-Scheffler
Keyword(s):  
Sexual Dimorphism ◽  
Metabolic Rate ◽  
Reproductive Strategies ◽  
Walking Speed ◽  
Size Variation ◽  
Human Populations ◽  
Optimal Speed ◽  
Metabolic Costs ◽  
Walking Speeds ◽  
Tibia Length

While human sexual dimorphism is generally expected to be the result of differential reproductive strategies, it has the potential to create differences in the energetics of locomotion and the speed at which each morph travels, particularly since people have been shown to choose walking speeds around their metabolic optimum. Here, people of varying sizes walked around a track at four self-selected speeds while their metabolic rate was collected, in order to test whether the size variation within a population could significantly affect the shape of the optimal walking curve. The data show that larger people have significantly faster optimal walking speeds, higher costs at their optimal speed, and a more acute optimal walking curve (thus an increased penalty for walking at suboptimal speeds). Bigger people who also have wider bitrochanteric breadths have lower metabolic costs at their minimum than bigger people with a more narrow bitrochanteric breadth. Finally, tibia length significantly positively predicts optimal walking speed. These results suggest sex-specific walking groups typical of living human populations may be the result of energy maximizing strategies. In addition, testable hypotheses of group strategies are put forth.

Tooth Size Variation in Prehistoric India

1985 ◽  
Vol 87 (4) ◽  
pp. 811-825 ◽  
Author(s):  
John R. Lukacs
Keyword(s):  
Size Variation ◽  
Tooth Size

scholarly journals Tooth Size Variation in Pinniped Dentitions

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0137100 ◽  
Author(s):  
Mieczyslaw Wolsan ◽  
Satoshi Suzuki ◽  
Masakazu Asahara ◽  
Masaharu Motokawa
Keyword(s):  
Size Variation ◽  
Tooth Size
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