Identifying Life-History Events in Dental Cementum: A Literature Review

Newham, Elis; Naji, Stephan

doi:10.1017/9781108569507.010

Cited by 3 publications

(5 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This represents the reduction in growth rates at the attainment of sexual maturity, creating increments that are narrower (higher counts of contrasting light/dark increments deposited per unit area) and vary less in orientation and opacity (intraspecific variation in growth rates between each growth increment), providing quantitative data for the relationship between the attainment of sexual maturity and cementum growth previously only suggested qualitatively (Fig. 1) (22,28,29,32).…”

Section: Attainment Of Sexual Maturitymentioning

confidence: 93%

“…Cementum helps to keep tooth crowns level above the gumline through life as the jaw remodels through growth and crowns are worn from occlusion (22,26). This is reflected in frequent observations of changes in increment width and quality at the reduction of somatic growth and attainment of sexual maturity in extant mammals (22,(27)(28)(29)(30)(31)(32). A number of extant mammal species display a negative sigmoidal trend in cementum increment thickness that follows their somatic growth patterns: rapid juvenile growth is represented by widely spaced irregularly organized increments (28), and the advent of sexual maturity and cessation of somatic growth lead to narrowly spaced, more uniformly organized increments (Figs.…”

Section: Cementochronology Of Mesozoic Mammaliaformsmentioning

confidence: 98%

“…Cementochronology is an important tool to investigate life history (26)(27)(28)(29)(30)(31)(32). Nondestructive SRCT imaging allows counting of annual growth layer groups [a pair of one thick "light," higher density increment deposited during favorable seasons and one thin "dark," lower density increment deposited during unfavorable seasons (26,27)] deposited for each year of life in the acellular extrinsic fiber portion of the cementum tissue (AEFC) (Materials and Methods) (Fig.…”

Section: Cementochronology Of Mesozoic Mammaliaformsmentioning

confidence: 99%

See 2 more Smart Citations

The origins of mammal growth patterns during the Jurassic mammalian radiation

Newham,

Corfe,

Brewer

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

We use synchrotron x-ray tomography of annual growth increments in the dental cementum of mammaliaforms (stem and crown fossil mammals) from three faunas across the Jurassic to map the origin of patterns of mammalian growth patterns, which are intrinsically related to mammalian endothermy. Although all fossils studied exhibited slower growth rates, longer life spans, and delayed sexual maturity relative to comparably sized extant mammals, the earliest crown mammals developed significantly faster growth rates in early life that reduced at sexual maturity, compared to stem mammaliaforms. Estimation of basal metabolic rates (BMRs) suggests that some fossil crown mammals had BMRs approaching the lowest rates of extant mammals. We suggest that mammalian growth patterns first evolved during their mid-Jurassic adaptive radiation, although growth remained slower than in extant mammals.

show abstract

Section: Attainment Of Sexual Maturitymentioning

confidence: 93%

Section: Cementochronology Of Mesozoic Mammaliaformsmentioning

confidence: 98%

Section: Cementochronology Of Mesozoic Mammaliaformsmentioning

confidence: 99%

See 1 more Smart Citation

The origins of mammal growth patterns during the Jurassic mammalian radiation

Newham,

Corfe,

Brewer

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…The most exciting area to explore demographic variables stems from noninvasive synchrotron 3D analysis (Le Cabec et al 2019;Newham et al 2019). This technology allows us to identify innovatively individual stress events (Mani-Caplazi et al 2019;Newham and Naji, accepted) and potentially female fertility in the past (Naji et al accepted).…”

Section: Cabbages and Storks Cabbages And Storksmentioning

confidence: 99%

The agricultural demographic transition, a Bocquet-Appel signature

Naji¹

2021

Journey of a Committed Paleodemographer

View full text Add to dashboard Cite

Jean-Pierre Bocquet-Appel (JPBA) had a broad anthropology vision focused on understanding human and pre-human population dynamics from an evolutionary demographic perspective. He was one of the rare paleodemographer in France with a robust understanding of cultural and biological anthropology and a solid experience in statistics. His large-scale, ‘top-down’ approach led him to test the hypothesis of an abrupt population growth in the major centers of agriculture invention worldwide. The signal of this Agricultural Demographic Transition (ADT) was identified in Europe, North America, and the Levant and characterized by a rapid fertility increase. Also, JPBA was the principal promoter of cementochronology as a solution to individual age estimation techniques.

show abstract

“…Several studies in animals [1][2][3][4] and in humans [5][6][7][8][9] were able to identify reproduction based on permanent records in the tooth cementum. (An overview is presented in [10]). Tooth cementum is deposited lifelong, supporting the anchoring of the tooth in the alveolar bone, and shows a layered structure with incremental lines (ILs) [11].…”

Section: Introductionmentioning

confidence: 99%

The concordance of signals based on irregular incremental lines in the human tooth cementum with documented pregnancies: Results from a systematic approach

et al. 2022

View full text Add to dashboard Cite

Background and objective There is evidence from previous studies that pregnancies and diseases are recorded in the tooth cementum. This study aims to assess the degree of concordance between signals based on irregular incremental lines (ILs) and reported pregnancies. Material and methods 23 recent and 24 archaeological human teeth with known birth history were included in this investigation. 129 histological sections of tooth roots were assessed for irregularities in appearance and width using a standardized protocol. Similarity of observed irregularities at the section level allowed us to define signals at the tooth level. The sensitivity of signals to detect pregnancies was determined and related to the signal prevalence. Results Pregnancy signals were frequently visually observed. However, applying a standardized process we could only reach signal sensitivities to identify pregnancies up to 20 percentage points above chance level. Conclusions Based on a standardized and reproducible method it could be confirmed that some pregnancies leave visible signals in the tooth cementum. The results show the potential of the tooth cementum to support reconstruction of life courses in paleopathology. However, it seems that not all pregnancies affect the cementogenesis in such a way that irregular ILs are identifiable. Further research is needed to better understand which type of pregnancies and other conditions are recorded in the tooth cementum.

show abstract

Identifying Life-History Events in Dental Cementum: A Literature Review

Cited by 3 publications

References 42 publications

The origins of mammal growth patterns during the Jurassic mammalian radiation

The origins of mammal growth patterns during the Jurassic mammalian radiation

The agricultural demographic transition, a Bocquet-Appel signature

The concordance of signals based on irregular incremental lines in the human tooth cementum with documented pregnancies: Results from a systematic approach

Contact Info

Product

Resources

About