Cold Stress in Captive Great Apes Recorded in Incremental Lines of Dental Cementum

Cipriano, A.

doi:10.1159/000060416

Cited by 29 publications

(26 citation statements)

References 17 publications

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“…Based on this current body of knowledge, it is reasonable to predict that these physiological events also impact the mineralization of dental cementum. Indeed, previous research on a variety of mammals shows that events impacting the physiology of an organism, such as a change in diet 64 , exposure to exceptional cold 65 and renal diseases 38 affect the histomorphology of cementum, and likely also its elemental composition. Humans are one of only five mammalian species 66 that experience a PRLS (and the only terrestrial one), hence comparative data from other organisms are unavailable.…”

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confidence: 99%

Parturitions, menopause and other physiological stressors are recorded in dental cementum microstructure

Cerrito

Bailey

et al. 2020

Sci Rep

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The life history pattern of recent humans is uniquely derived in many of its aspects including an extended post-reproductive lifespan combined with short interbirth intervals. A number of theories have been proposed to explain the evolution of this unusual pattern. However most have been difficult to test due to the fragmentary nature of the hominin fossil record and the lack of methods capable of inferring such later life history events. In search of a method we tested the hypothesis that the physiologically impactful events of parturition and menopause are recorded in dental cementum microstructure. We performed histomorphological analyses of 47 teeth from 15 individuals with known life history events and were able to detect reproductive events and menopause in all females. Furthermore, we found that other stressful events such as systemic illnesses and incarceration are also detectable. Finally, through the development of a novel analytical method we were able to time all such events with high accuracy (R-squared = 0.92).

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confidence: 99%

Parturitions, menopause and other physiological stressors are recorded in dental cementum microstructure

Cerrito

Bailey

et al. 2020

Sci Rep

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“…Thus, both hormones and vitamins may interact to produce a circannual rhythm by a complex mechanism of environmental and physiochemical “synchronizers” (Halberg et al, 1983). Many questions remain regarding the mechanisms of tooth cementum annulation and its influencing factors, particularly concerning the interpretation of seasonal increments (Stott et al, 1980; Lieberman, 1994; Cipriano, 2001).…”

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Tooth cementum annulation for age estimation: Results from a large known‐age validation study

Wittwer-Backofen

Gampe

Vaupel

2003

American J Phys Anthropol

231

122

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Recent research indicates that tooth-cementum annulations (TCA) may be used more reliably than other morphological or histological traits of the adult skeleton to estimate age. Until now, however, confidence intervals for age estimated by this method have not been available for paleodemographic and forensic applications. The present study addresses this problem. Based on a large known-age sample, age estimates by TCA were conducted in a blind study involving 363 teeth. Tooth-root cross sections were made using a refined preparation technique. Improved digital graphic procedures and enhancement strategies were used to produce digital images with a specially adapted software package. This resulted in high concordance between the TCA age estimates and chronological age. Assessment of the method's accuracy, as expressed by 95% confidence intervals, showed that error bounds for age estimates do not exceed 2.5 years. Sex differences, intraindividual correlations, and the effects of periodontal disease were studied. None of these indicators had a quantitative effect on the number of TCA bands when the proposed methodological standard was followed. We conclude that the TCA technique is a reliable method for estimating a subject's age from cementum annulations.

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“…These life history parameters appear to change calcium metabolism [4, 5], and lack of available calcium at the mineralization front of the cementum causes formation of a such visually different incremental AEFC line [3]. In a study on humans [3], as well as in great apes [6] “suspicious” AEFC lines were successfully detected as being visibly broader and translucent in tooth ground sections (70 - 80μm thick) under optical magnification with transmuted polarized light. These studies also showed that some of the LHPs affecting mineralization of AEFC are precisely datable from the AEFC cross-sections.…”

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Life history parameters in acellular extrinsic fiber cementum microstructure

Edinborough

Fearn

Pilgrim

et al. 2019

Preprint

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28Life-history parameters such as pregnancies, skeletal trauma, and renal disease have previously 29 been identified from hypomineralized growth layers (incremental lines) of acellular extrinsic 30 fiber cementum (AEFC). The precise periodicity of these growth layers remains vaguely 31 approximated, so causal life-history explanations using tooth cementum cannot yet be 32 rigorously calculated or tested. On the other hand, we show how life history parameters in 33 AEFC can be identified by two contrasting elemental detection methods. Based on our results 34 we reject the possibility of accurate estimation of pregnancies and other life history parameters 35 from cementum using scanning electron microscopy alone. Here, we propose a new 36 methodological approach for cementum research, Time-of-Flight Secondary Ion Mass 37 Spectrometry (ToF-SIMS), to measure degree and distribution of mineralization of cementum 38 growth layers. Our results show that Tof-SIMS can significantly increase our knowledge of 39 cementum composition and is therefore a powerful new tool for life history researchers. 40 41 131 Cluster ion sources, such as Bi 3 , are used to identify larger HAp fragment ions at for example 132 m/z 485, 541, 597, and 653, identified as Ca 5 P 3 O 12 + , Ca 6 P 3 O 13 + , Ca 7 P 3 O 14 + , and Ca 8 P 3 O 15 + , 133 respectively. Ionic species sputtered from the surface under the bismuth bombardment are 134 steered into a reflectron time-of-flight mass analyzer. Before mass spectrometry was 135 performed, an Ar n + cluster ion beam was used to remove any surface organic contaminants. 136 Identified peaks strongly localized to cementum growth layers were mapped on single ion 137 maps. Positive-ion spectra were acquired from two different 100×100 μm regions of tooth 138 encompassing the entire cementum width from mesio-buccal and disto-buccal side of the tooth, 139 respectively to localize of HAp and identification of different CaP phases within cementum 140 layers. Results 147 SEM-EDS 148No visual evidence of cementum growth layering was found SEM micrograph using Philips 149 XL30 FEG-SEM (Hillsboro, OR, USA) equipped with an Oxford instruments energy 150 dispersive x-ray analysis detector (Fig 1a). The Ca:P ratio (by atomic percent) ranged from 151 1.47 to 1.73, with 1.59 as average value. Line scan for Ca showed no significant change in its 152 relative amounts across the width of the cementum (Fig 1b), except in the case of line spectrum 153 (8) which exhibits the lowest relative amount of Ca as of 0.13(atomic %), as well as the lowest 154 Ca:Pa ratio as of 1.29 by atomic % (Fig.1a). However, these low readings for the line spectrum 155 (8) are due to an intruding artefact deposited in cementum, which can be clearly observed on 156 electron photomicrograph of a transverse section of midroot cementum (Fig 1a), and should 157 not be taken into account when interpreting mineral distribution across the AEFC width of our 158 sample.

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Cold Stress in Captive Great Apes Recorded in Incremental Lines of Dental Cementum

Cited by 29 publications

References 17 publications

Parturitions, menopause and other physiological stressors are recorded in dental cementum microstructure

Parturitions, menopause and other physiological stressors are recorded in dental cementum microstructure

Tooth cementum annulation for age estimation: Results from a large known‐age validation study

Life history parameters in acellular extrinsic fiber cementum microstructure

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