Timing of Demirjian's tooth formation stages

Liversidge, Helen M.; Chaillet, Nils; Mörnstad, H; Nyström, Marjatta; Rowlings, K; Taylor, J. Andrew; Willems, Guy

doi:10.1080/03014460600802387

Cited by 126 publications

(99 citation statements)

References 19 publications

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“…The cause of this phenomenon seems to be, e.g. ethnic differences [28,29,34], and also an observed tendency to earlier sexual maturity in normally developing children [29,31,32,34].…”

Section: Discussionmentioning

confidence: 99%

Influence of growth hormone therapy on selected dental and skeletal system parameters

Partyka¹,

Chałas²,

Dunin-Wilczyńska³

et al. 2018

Ann Agric Environ Med.

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Partyka M, Chałas R, Dunin-Wilczyńska I, Drohomyretska M, Klatka M. Influence of growth hormone therapy on selected dental and skeletal system parameters. Ann Agric Environ Med. 2018; 25(1): 60-65. doi: 10.5604/12321966.1233573 Abstract Introduction. Growth hormone deficiency (GHD) is one of the main indications for growth hormone therapy. One characteristic of this disease is bone age delay in relation to the chronological age. Pituitary dysfunction negatively affects the growth and development of the jaws and teeth of the child. The secretion of endocrine glands regulates growth, development, and gender differentiation. It also controls the growth of bones and teeth, regulates metabolism of calcium and phosphate, proteins, lipids and carbohydrates. The primary role in the endocrine system is played by the pituitary gland which is responsible for the production of somatotropin [1]. Dysfunction of the pituitary gland has a negative effect on the growth and development of long bones in the body, and may have an adverse effect on the development of maxilla, mandible and dentition of a child. There is some information in the literature that dental age is delayed in short stature children; the replacement of deciduous teeth by permanent teeth is also delayed, and newly erupted permanent teeth often require orthodontic treatment. Applying hormonal therapy positively affects the process of replacement of dentition [2,3,4,5,6]. Objectives. The aim of the study was to assess bone and dental age, as well as analyze the state of dentition in children diagnosed with GH deficiency treated with growth hormone, depending on the duration of treatment. Materials and method. The study material consisted of 110 children (27 males, 83 females), hospitalized for somatotropin hypopituitarism in the Department of Paediatric Endocrinology and Diabetology at the Medical University of Lublin, Poland. The mean birth age was 13 years (156 months) with a standard deviation of 2 years and 6 months (30 months). 47 children (43%) started treatment with the growth hormone (group starting treatment) and 63 children (57%) whose treatment was started 2-3 years previously (group in the course of treatment). The control group consisted of 41 generally healthy children (15males, 25 females) with ENT problems, such as hypoacusis and a condition after nasal injury, hospitalized in the Department of Paediatric Otolaryngology at the Medical University of Lublin, Poland. The mean age was 11 years and 5 months (137 months) with standard deviation of 2 years and 5 months (29 months).

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“…The cause of this phenomenon seems to be, e.g. ethnic differences [28,29,34], and also an observed tendency to earlier sexual maturity in normally developing children [29,31,32,34].…”

Section: Discussionmentioning

confidence: 99%

Influence of growth hormone therapy on selected dental and skeletal system parameters

Partyka¹,

Chałas²,

Dunin-Wilczyńska³

et al. 2018

Ann Agric Environ Med.

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“…Around 83% of comparisons in our 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 (Liversidge et al, 2006). About 13% of comparisons were significantly different between groups with no clear pattern.…”

Section: Comparison Between Northern and Western Groupsmentioning

confidence: 99%

“…This is particularly evident in crown formation 52 (Antoine et al, 2009). Children vary considerably with 53 respect to maturing teeth in relation to chronological age 54 by a number of years, but are still considered biologically 55 normal (Demirjian & Levesque, 1980;Levesque et al, 1981;56 Liversidge, 2011;Liversidge et al, 2006;Nystrom et al, 57 2007). 58…”

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confidence: 99%

“…Another challenge is that teeth mature over a long period of time in relation to other body systems, developing from prior to birth into early adulthood when individuals undergo marked morphologic and skeletal change with genetic and other environmental factors playing a role. Only a handful of studies describe the timing of individual tooth stages using appropriate statistical methods and dispersion parameters across age and these are listed in Table 1 (Anderson et al, 1976;Demirjian & Levesque, 1980;Fanning & Brown, 1971;Garn et al, 1959;Haavikko, 1970;Levesque et al, 1981;Liversidge, 2008Liversidge, , 2011Liversidge & Speechly, 2001;Liversidge et al, 2006;Moorrees et al, 1963;Nystro €m et al, 2007;Thompson et al, 1975;Zhao et al, 1990). Some directly compare ethnic/regional groups (Liversidge, 2008(Liversidge, , 2011Liversidge et al, 2006), one notes differences for the 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 third molar (Liversidge, 2008), whilst others showed similarities (Liversidge, 2011;Liversidge et al, 2006) in formation times.…”

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confidence: 99%

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The timing of mandibular tooth formation in two African groups

Elamin

Hector

Liversidge

2016

Annals of Human Biology

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Background: Ethnic differences in the timing of human tooth development are unclear. Aim: To describe similarities and differences in the timing of tooth formation in two groups of Sudanese children and young adults. Subjects and methods: The sample consisted of healthy individuals from Khartoum, Sudan, aged 2-23 years. The Northern group was of Arab origin (848 males, 802 females) and the Western group was of African origin (846 males, 402 females). Each mandibular left permanent tooth from first incisor to third molar was assessed from dental radiographs into one of 15 development stages. Mean ages at entry for 306 tooth stages were calculated using probit regression in males/females in each group and compared using a t-test. Results: Mean ages were not significantly different in most tooth stage comparisons between ethnic groups for both males (61/75) and females (56/76), despite a tendency of earlier mean ages in the Western group. Mean ages for most tooth stage comparisons between males and females (137/155) were not significantly different within ethnic groups suggesting low sexual dimorphism. Conclusion: The mean ages of most mandibular tooth formation stages were generally not significantly different between ethnic groups or between males and females in this study.

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“…Unfortunately, no M3 exists in this specimen that would have allowed the age at dental maturity (M3 root completion) to be tracked beyond the age at P4 root completion but it would have probably been 3 or 4 years more. Liversidge and colleagues have now published several large databases of chronological ages of children with teeth at many fractional stages of development [70,[89][90][91][92][93][94]. These dental radiographic data are especially valuable because they include many populations worldwide.…”

Section: (I) S7-37mentioning

confidence: 99%

Measures of maturation in early fossil hominins: events at the first transition from australopiths to earlyHomo

Dean

2016

Phil. Trans. R. Soc. B

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One contribution of 17 to a discussion meeting issue 'Major transitions in human evolution'. Subject Areas: evolution, palaeontologyKeywords: hominin evolution, life history, dental development, incremental markings, enamel, dentine Author for correspondence: M. Christopher Dean e-mail: ucgacrd@ucl.ac.ukMeasures of maturation in early fossil hominins: events at the first transition from australopiths to early Homo M. Christopher DeanDepartment of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK An important question in palaeoanthropology is whether, among the australopiths and the first fossil hominins attributed to early Homo, there was a shift towards a more prolonged period of growth that can be distinguished from that of the living great apes and whether between the end of weaning and the beginning of puberty there was a slow period of growth as there is in modern humans. Evidence for the pace of growth in early fossil hominins comes from preserved tooth microstructure. A record of incremental growth in enamel and dentine persists, which allows us to reconstruct tooth growth and compare key measures of dental maturation with modern humans and living great apes. Despite their diverse diets and way of life, it is currently difficult to identify any clear differences in the timing of dental development among living great apes, australopiths and the earliest hominins attributed to the genus Homo. There is, however, limited evidence that some early hominins may have attained a greater proportion of their body mass and stature relatively earlier in the growth period than is typical of modern humans today.This article is part of the themed issue 'Major transitions in human evolution'.

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Timing of Demirjian's tooth formation stages

Abstract: These results suggest no major differences in the timing of tooth formation stages between these children. This fails to explain previous findings of differences using Demirjian's dental maturity method.

Cited by 126 publications

References 19 publications

Influence of growth hormone therapy on selected dental and skeletal system parameters

Influence of growth hormone therapy on selected dental and skeletal system parameters

The timing of mandibular tooth formation in two African groups

Measures of maturation in early fossil hominins: events at the first transition from australopiths to earlyHomo

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