Morphological features of Jat dentition

Kaul, Vijay Kumar; Prakash, Suraj

doi:10.1002/ajpa.1330540115

Cited by 56 publications

(46 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar findings have occurred elsewhere, [13][14][15][16][17] but these are in contradiction with some other studies. [18][19][20][21][22] It appears difficult to conclude that sex differences exist in Carabelli's trait.…”

Section: Discussioncontrasting

confidence: 57%

Ethnic dental analysis of shovel and Carabelli's traits in a Chinese population

Hsu

Tsai

Hsiao

et al. 1999

Australian Dental Journal

View full text Add to dashboard Cite

Chinese populations differ from Caucasoids by having a high prevalence of shovel trait and a low prevalence of Carabelli's trait. This study was conducted to investigate the association between the shovel and the Carabelli's traits in a Chinese population. The research design investigated a Chinese population that resides in southern Taiwan. The ancestors of this Chinese population migrated to Taiwan from mainland China, mainly from Fukien and Kwangtung. The effects of sex and age on Carabelli's trait were controlled in this investigation, as was the association between tooth size and Carabelli's trait. Results show that males were more likely to have Carabelli's trait expressed on teeth than females. The buccolingual diameter of Carabelli's trait teeth was larger than that of teeth without the trait. After controlling for sex, age, and tooth size, the existence of the shovel trait increased the likelihood of having Carabelli's trait by a factor of five and a half, which is a significant effect.

show abstract

Section: Discussioncontrasting

confidence: 57%

Ethnic dental analysis of shovel and Carabelli's traits in a Chinese population

Hsu

Tsai

Hsiao

et al. 1999

Australian Dental Journal

View full text Add to dashboard Cite

show abstract

“…A consistent sex dimorphism in this trait has been described across a series of smaller samples of Southwest Indians and American whites (Scott, 1977). Moreover, Harris (19771, Kieser and Preston (1981), and Kaul and Prakash (1981) also found this trait to be sexually dimorphic in three distantly related populations. Subtly reflecting our primate heritage, the canines are still the most dimorphic teeth in the dentition from an odontometric standpoint (Garn et al, 1967).…”

Section: Discussionmentioning

confidence: 90%

The dental morphology of Pima Indians

Scott

Potter

Noss

et al. 1983

American J Phys Anthropol

View full text Add to dashboard Cite

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.

show abstract

“…One notable exception is the distal accessory ridge of the upper and lower canines. Scott (1973,1977) first demonstrated strong sexual dimorphism in the expression of this trait, and his findings have since been borne out in several studies (Harris, 1977;Kieser and Preston, 1981;Kaul and Prakash, 1981). Sex differences have also been found for shoveling of the upper central incisor (Harris, 1980).…”

Section: Samplementioning

confidence: 88%

Complex segregation analysis of dental morphological variants

Nichol

1989

American J Phys Anthropol

View full text Add to dashboard Cite

A set of 20 morphological variants of the dental crowns and four characteristics of the jaws are tested for probable mode of inheritance using the complex segregation analysis method of Morton et al. (Am. J. Hum. Genet. 23:602-611, 1971). Models tested include three two-allele single-locus models (dominant, codominant, and recessive) and a model employing the polychotomized normal distribution of liability (an additive polygenic model), with transmissibility estimated via maximum likelihood. Most of the traits studied are observed using ordinal scales with several grades, and many are tested using more than one dichotomy of their scale. These multiple analyses allow for an examination of such factors as trait incidence on the results of the statistical analysis. The results of the analysis yield propositions of major genes for 13 of the 24 traits examined. Two traits give good evidence of being polygenic in origin. The remaining nine characters present methodological problems that do not allow for a definite conclusion on their mode of inheritance at this time. The ability to test varying levels of transmissibility in the polygenic model allows for an estimation of the percentage of trait variance determined by familial factors. Estimates of transmissibility for all characters examined range from 0 to 1, with a mean of 0.36. These findings may suggest a large environmental role in the development of dental crown morphology. However, the possibility exists that difficulties in the ability to classify the expression of certain traits consistently result in overestimates of the environmental influences on the development of those characters.

show abstract

Morphological features of Jat dentition

Cited by 56 publications

References 5 publications

Ethnic dental analysis of shovel and Carabelli's traits in a Chinese population

Ethnic dental analysis of shovel and Carabelli's traits in a Chinese population

The dental morphology of Pima Indians

Complex segregation analysis of dental morphological variants

Contact Info

Product

Resources

About