Mesiodistal Crown Diameters of the Deciduous and Permanent Teeth in Individuals

Moorrees, Coenraad F. A.; Thomsen, Selma Ø.; Jensen, Elli; Yen, Peter Kai-Jen

doi:10.1177/00220345570360011501

Cited by 306 publications

(175 citation statements)

References 3 publications

(1 reference statement)

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“…Mesiodistal crown diameter (MD) was measured as the distance between the mesial and distal contact points of the tooth crown [1,15] by using a 2D imaging system. Dental casts were oriented using an adjustable stage to obtain the correct plane or angle before taking images and a calibrated Image J [16] software was used to digitise landmarks (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…A number of studies have been conducted on sexual dimorphism in the human dentition. In general, males have larger crown diameters than females [1,2], and sexual dimorphism is greater in permanent than in primary dentition [2,3]. Meanwhile, studies on sexual dimorphism in adult human dermatoglyphs reveal that males have fewer ridges than females [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Complex Systems in Human Development: Sexual Dimorphism in Teeth and Fingerprints of Australian Twins

Taduran

Ranjitkar

Hughes

et al. 2017

WIT Transactions on State-of-the-Art in Science and Engineering

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Human teeth and fingerprints have similar embryological origin from epithelial-mesenchymal interactions. This study aims to determine the nature and extent of sexual dimorphism in fingerprints and teeth of twins; investigate the influences of genetic, epigenetic and environmental factors on observed variation; identify possible developmental associations between the phenotypes; and explore whether both systems display the features of complex adaptive systems. Mesiodistal (MD) measurements from both primary and permanent teeth and ridge density (RD) from three different finger areas, namely ulnar (U), radial (R), and proximal (P), from fingerprints of the same set of monozygotic and dizygotic Australian twins (28 males and 31 females aged 8 to 10 years, and aged 13 to 16 years, respectively) were collected and analysed. Sexual dimorphism was observed in both the primary and permanent dentitions, with the latter showing greater magnitude of differences than the former. There was no observed sexual dimorphism in the fingerprints of the 8 to 10 year cohort, but a few finger areas (left index U, right index R, left little R, and left little P) of the 13-to 16-year cohort exhibited significant differences, showing that friction ridges expand over time. It was concluded that both dentition and dermatoglyphics display characteristics of complex adaptive systems.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Complex Systems in Human Development: Sexual Dimorphism in Teeth and Fingerprints of Australian Twins

Taduran

Ranjitkar

Hughes

et al. 2017

WIT Transactions on State-of-the-Art in Science and Engineering

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“…The measurements were recorded by holding the caliper parallel to the occlusal surface and perpendicular to the long axis of the tooth. [3] To gain easier access to interdental spaces, the measuring tips of the digital caliper were narrowed. To diminish ocular fatigue, not more than six sets of casts were measured per day.…”

Section: Methodsmentioning

confidence: 99%

“…The first employs direct measurements of the teeth from radiographs with or without the use of prediction formula. [2][3][4] The second method utilizes prediction tables based on measurements of other erupted permanent teeth. [5][6][7][8] The third method involves a combination of previous two methods, i.e.…”

Section: What This Study Adds To the Fieldmentioning

confidence: 99%

Comparative evaluation of three mixed dentition analyses and formulation of regression equations for north Indian population: A cross-sectional study

Juneja¹,

Mahajan²,

Kaur³

et al. 2015

Biomed J

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Background: The present study was undertaken to evaluate the accuracy of methods proposed by Tanaka and Johnston, Moyers, and Bernabé and Flores-Mir to forecast the mesiodistal dimensions of permanent canine and premolars in a North Indian population. Methods:Mesiodistal tooth dimensions were measured from study models representing 68 male and 68 female subjects (aged 12-16 years) of North Indian descent. The mesiodistal dimensions of the teeth were measured using a digital Vernier caliper (providing measurements to 0.01 mm accuracy). The measurements of canine and premolars were summed up and compared with those derived from Tanaka and Johnston equations, Moyers probability tables (75 th percentile), and Bernabé and Flores-Mir equations. Results:All the three methods exhibited overestimation of actual sum of permanent canine and premolars in both the arches and genders in this population. Because of the discrepancy observed, new regression analyses in the form of Y = A + B (X) were formulated similar to those proposed by Tanaka and Johnston originally, but separately for males and females. In males, the correlation coefficient between the sum of mesiodistal widths of mandibular incisors and the sum of widths of canine and premolars was 0.637 and 0.685 for maxilla and mandible, respectively. This value was 0.55 for maxilla and 0.64 for mandible in females. These values were found to be statistically significant. Conclusion: All the methods evaluated in the study were found to be inaccurate and they overestimate the mesiodistal widths of permanent canine and premolars in North Indian population. Revised linear regression equations were derived using the data obtained from this population. (Biomed J 2015;38:450-455)

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“…Some researchers have proposed that sexual differences are regulated by sex chromosomes [1,2], but there are some who have suggested that hormonal influences are also important [3,4]. Sexual dimorphism in human dentition and dermatoglyphs have been studied separately, and results are fairly consistent: males have larger tooth crown diameters than females [5,6], sexual dimorphism is greater in permanent than in primary teeth [6,7] and adult males have fewer finger ridges than females [8,9].…”

Section: Introductionmentioning

confidence: 99%

Two complex adaptive systems in human development: Further studies of dental and fingerprint parameters

Taduran¹,

Ranjitkar²,

Hughes³

et al. 2018

Int. J. DNE

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This paper reports further results and an extension of the study presented at Complex Systems 2016. Human teeth and fingerprints both arise from genetic/epigenetic/environmental interactions and have embryological pathways with epithelial-mesenchymal interactions. The aims of this study were to determine the nature and extent of sexual dimorphism in teeth and fingerprints of twins at two different ages and to explore whether both systems display the features of complex adaptive systems. Buccolingual (BL) measurements from both primary and permanent teeth and ridge breadth (RB) measurements from fingerprints of the same set of Australian twins (28 males and 31 females aged 8 to 10 years, and aged 13 to 16 years, respectively) were collected and analysed. Sexual dimorphism was observed in both the primary and permanent dentitions, with the latter showing greater differences than the former. There was no observed sexual dimorphism in the fingerprints at 8 to 10 years. However, a few fingers (left index, left ring, and right middle) at 13 to 16-years exhibited significant differences, suggesting that friction ridges expand over time. It is concluded that both the dentition and dermatoglyphics display sexual dimorphism and characteristics of complex adaptive systems.

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Mesiodistal Crown Diameters of the Deciduous and Permanent Teeth in Individuals

Cited by 306 publications

References 3 publications

Complex Systems in Human Development: Sexual Dimorphism in Teeth and Fingerprints of Australian Twins

Complex Systems in Human Development: Sexual Dimorphism in Teeth and Fingerprints of Australian Twins

Comparative evaluation of three mixed dentition analyses and formulation of regression equations for north Indian population: A cross-sectional study

Two complex adaptive systems in human development: Further studies of dental and fingerprint parameters

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