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Tiwa ES, Pilipili CM, Ramírez Rozzi FV. Early onset of enamel formation in Baka pygmy's deciduous canines. Arch Oral Biol 2024; 166:106030. [PMID: 38941877 DOI: 10.1016/j.archoralbio.2024.106030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 06/10/2024] [Accepted: 06/11/2024] [Indexed: 06/30/2024]
Abstract
OBJECTIVE Our aim was to evaluate by enamel microstructure analysis two hypotheses that would explain the early dental eruption in the Bakaparticularity, a shorter crown formation time and/or earlier onset of crown formation. DESIGN Deciduous canines corresponds to the best teeth to perform the analysis of enamel microstructure. Longitudinal ground sections of 21 deciduous canines from 12 individuals were studied with transmitted light microscopy. Cross-striations, striaes of Retzius (SR) and the neonatal line (NNL) enable to establish the prenatal crown formation time (preCFT), the postnatal crown formation time (postCFT), the crown formation time (CFT) as well as the daily secretion rate (DSR) and the enamel extension rate (EER) and their variation along crown formation. RESULTS The DSR and the EER in the Baka are similar than in other populations with an average DSR of 3.26 µm and EER of 18.18 µm. The preCFT was 154 days, the postCFT 265 days and CFT 419 days. Comparison with other population does not show difference in CFT. However, the preCFT and the postCFT differ, the first is higher and the second lower in the Baka than in other populations. Furthermore, the number of prenatal areas of enamel was greater in the Baka. CONCLUSION Our analysis suggests that the Baka does not distinguish by a different CFT but the onset of crown formation is earlier than in other groups. Therefore, the early dental eruption in the Baka results from an earlier onset of crown formation.
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Affiliation(s)
- Elsa Sonkeng Tiwa
- Laboratoire de Pathologies, Imagerie et Biothérapies Orofaciales et Plate-forme Imageries du vivant, URP 2496, Faculté de chirurgie dentaire, Université Paris Cité, Montrouge, France; Odontostomatologie, Institut Supérieur des Sciences de la Santé, Université des Montagnes, Bangangté, Cameroon
| | - Charles Muhima Pilipili
- Odontostomatologie, Institut Supérieur des Sciences de la Santé, Université des Montagnes, Bangangté, Cameroon
| | - Fernando V Ramírez Rozzi
- Laboratoire de Pathologies, Imagerie et Biothérapies Orofaciales et Plate-forme Imageries du vivant, URP 2496, Faculté de chirurgie dentaire, Université Paris Cité, Montrouge, France; UMR 7206 Écoanthropologie, MNHN, CNRS, Université de Paris Cité, Musée de l'Homme, Paris, France.
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2
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Nava A, Lugli F, Lemmers S, Cerrito P, Mahoney P, Bondioli L, Müller W. Reading children's teeth to reconstruct life history and the evolution of human cooperation and cognition: The role of dental enamel microstructure and chemistry. Neurosci Biobehav Rev 2024; 163:105745. [PMID: 38825260 DOI: 10.1016/j.neubiorev.2024.105745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/25/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
Studying infants in the past is crucial for understanding the evolution of human life history and the evolution of cooperation, cognition, and communication. An infant's growth, health, and mortality can provide information about the dynamics and structure of a population, their cultural practices, and the adaptive capacity of a community. Skeletal remains provide one way of accessing this information for humans recovered prior to the historical periods. Teeth in particular, are retrospective archives of information that can be accessed through morphological, micromorphological, and biogeochemical methods. This review discusses how the microanatomy and formation of teeth, and particularly enamel, serve as archives of somatic growth, stress, and the environment. Examining their role in the broader context of human evolution, we discuss dental biogeochemistry and emphasize how the incremental growth of tooth microstructure facilitates the reconstruction of temporal data related to health, diet, mobility, and stress in past societies. The review concludes by considering tooth microstructure as a biomarker and the potential clinical applications.
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Affiliation(s)
- Alessia Nava
- Department of Odontostomatological and Maxillofacial Sciences, Sapienza University of Rome, via Caserta 6, Rome 00161, Italy.
| | - Federico Lugli
- Institut of Geosciences, Goethe University Frankfurt, 60438, Frankfurt, Frankfurt am Main, Germany; Frankfurt Isotope and Element Research Center (FIERCE), Goethe University Frankfurt, Frankfurt am Main, Germany; Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Giuseppe Campi, 103, Modena 41125, Italy
| | - Simone Lemmers
- Elettra Sincrotrone Trieste S.C.p.A., AREA Science Park, s.s. 14 km 163,500, Basovizza, Trieste, Italy; Department of Psychiatry, Harvard Medical School, 401 Park Drive, Boston, MA, USA; Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA, USA
| | - Paola Cerrito
- Department of Evolutionary Anthropology, University of Zürich, Zürich, Switzerland
| | - Patrick Mahoney
- School of Anthropology and Conservation, University of Kent, Giles Ln, Giles Ln, Canterbury CT2 7NZ, UK
| | - Luca Bondioli
- Department of Cultural Heritage, University of Padua, Piazza Capitaniato, 7, Padua 35139, Italy
| | - Wolfgang Müller
- Institut of Geosciences, Goethe University Frankfurt, 60438, Frankfurt, Frankfurt am Main, Germany; Frankfurt Isotope and Element Research Center (FIERCE), Goethe University Frankfurt, Frankfurt am Main, Germany
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3
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Gatti L, Lugli F, Sciutto G, Zangheri M, Prati S, Mirasoli M, Silvestrini S, Benazzi S, Tütken T, Douka K, Collina C, Boschin F, Romandini M, Iacumin P, Guardigli M, Roda A, Mazzeo R. Combining elemental and immunochemical analyses to characterize diagenetic alteration patterns in ancient skeletal remains. Sci Rep 2022; 12:5112. [PMID: 35332214 PMCID: PMC8948219 DOI: 10.1038/s41598-022-08979-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/18/2022] [Indexed: 11/22/2022] Open
Abstract
Bones and teeth are biological archives, but their structure and composition are subjected to alteration overtime due to biological and chemical degradation postmortem, influenced by burial environment and conditions. Nevertheless, organic fraction preservation is mandatory for several archeometric analyses and applications. The mutual protection between biomineral and organic fractions in bones and teeth may lead to a limited diagenetic alteration, promoting a better conservation of the organic fraction. However, the correlation between elemental variations and the presence of organic materials (e.g., collagen) in the same specimen is still unclear. To fill this gap, chemiluminescent (CL) immunochemical imaging analysis has been applied for the first time for collagen localization. Then, Laser Ablation–Inductively Coupled Plasma–Mass Spectrometry (LA–ICP–MS) and CL imaging were combined to investigate the correlation between elemental (i.e., REE, U, Sr, Ba) and collagen distribution. Teeth and bones from various archeological contexts, chronological periods, and characterized by different collagen content were analyzed. Immunochemical analysis revealed a heterogeneous distribution of collagen, especially in highly degraded samples. Subsequently, LA–ICP–MS showed a correlation between the presence of uranium and rare earth elements and areas with low amount of collagen. The innovative integration between the two methods permitted to clarify the mutual relation between elemental variation and collagen preservation overtime, thus contributing to unravel the effects of diagenetic alteration in bones and teeth.
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Affiliation(s)
- L Gatti
- Department of Chemistry, University of Bologna-Ravenna Campus, Via Guaccimanni, 42, 48121, Ravenna, Italy
| | - Federico Lugli
- Department of Cultural Heritage, University of Bologna-Ravenna Campus, Via degli Ariani 1, 48121, Ravenna, Italy. .,Department of Chemical and Geological Science, University of Modena and Reggio Emilia, 41125, Modena, Italy.
| | - Giorgia Sciutto
- Department of Chemistry, University of Bologna-Ravenna Campus, Via Guaccimanni, 42, 48121, Ravenna, Italy.
| | - M Zangheri
- Department of Chemistry, "Giacomo Ciamician" Alma Mater Studiorum-University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - S Prati
- Department of Chemistry, University of Bologna-Ravenna Campus, Via Guaccimanni, 42, 48121, Ravenna, Italy
| | - M Mirasoli
- Department of Chemistry, "Giacomo Ciamician" Alma Mater Studiorum-University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - S Silvestrini
- Department of Cultural Heritage, University of Bologna-Ravenna Campus, Via degli Ariani 1, 48121, Ravenna, Italy
| | - S Benazzi
- Department of Cultural Heritage, University of Bologna-Ravenna Campus, Via degli Ariani 1, 48121, Ravenna, Italy
| | - T Tütken
- Applied and Analytical Paleontology, Institute of Geosciences, Johannes Gutenberg University, 55128, Mainz, Germany
| | - K Douka
- Department of Archaeology, Max Planck Institute for the Science of Human History, 07745, Jena, Germany.,Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, OX1 3QY, UK
| | - C Collina
- Museo Civico Archeologico Biagio Greco, Mondragone, Caserta, Italy
| | - F Boschin
- Department of Physical Science, Earth and Environment, U.R. Preistoria e Antropologia, University of Siena, Siena, Italy
| | - M Romandini
- Department of Cultural Heritage, University of Bologna-Ravenna Campus, Via degli Ariani 1, 48121, Ravenna, Italy
| | - P Iacumin
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - M Guardigli
- Department of Chemistry, "Giacomo Ciamician" Alma Mater Studiorum-University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - A Roda
- INBB, National Institute of Biostructures and Biosystems, Rome, Italy
| | - R Mazzeo
- Department of Cultural Heritage, University of Bologna-Ravenna Campus, Via degli Ariani 1, 48121, Ravenna, Italy.,Department of Chemistry, "Giacomo Ciamician" Alma Mater Studiorum-University of Bologna, Via Selmi 2, 40126, Bologna, Italy
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4
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Nava A, Mahoney P, Bondioli L, Coppa A, Cristiani E, Fattore L, McFarlane G, Dreossi D, Mancini L. Virtual histology of archaeological human deciduous prenatal enamel through synchrotron X-ray computed microtomography images. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:247-253. [PMID: 34985442 PMCID: PMC8733994 DOI: 10.1107/s160057752101208x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 11/12/2021] [Indexed: 05/28/2023]
Abstract
Virtual histology is increasingly utilized to reconstruct the cell mechanisms underlying dental morphology for fragile fossils when physical thin sections are not permitted. Yet, the comparability of data derived from virtual and physical thin sections is rarely tested. Here, the results from archaeological human deciduous incisor physical sections are compared with virtual ones obtained by phase-contrast synchrotron radiation computed microtomography (SRµCT) of intact specimens using a multi-scale approach. Moreover, virtual prenatal daily enamel secretion rates are compared with those calculated from physical thin sections of the same tooth class from the same archaeological skeletal series. Results showed overall good visibility of the enamel microstructures in the virtual sections which are comparable to that of physical ones. The highest spatial resolution SRµCT setting (effective pixel size = 0.9 µm) produced daily secretion rates that matched those calculated from physical sections. Rates obtained using the lowest spatial resolution setup (effective pixel size = 2.0 µm) were higher than those obtained from physical sections. The results demonstrate that virtual histology can be applied to the investigated samples to obtain reliable and quantitative measurements of prenatal daily enamel secretion rates.
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Affiliation(s)
- Alessia Nava
- School of Anthropology and Conservation, University of Kent, Giles Lane, Canterbury CT2 7NZ, United Kingdom
- Department of Maxillo-Facial Sciences, Sapienza University of Rome, Via Caserta 6, Rome 00161, Italy
| | - Patrick Mahoney
- School of Anthropology and Conservation, University of Kent, Giles Lane, Canterbury CT2 7NZ, United Kingdom
| | - Luca Bondioli
- Department of Cultural Heritage, University of Bologna, Via degli Ariani 1, Ravenna 48121, Italy
| | - Alfredo Coppa
- Department of Environmental Biology, Sapienza University of Rome, P. le Aldo Moro 5, Rome 00185, Italy
| | - Emanuela Cristiani
- Department of Maxillo-Facial Sciences, Sapienza University of Rome, Via Caserta 6, Rome 00161, Italy
| | - Luciano Fattore
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome, via Eudossiana 18, Rome 00184, Italy
| | - Gina McFarlane
- School of Anthropology and Conservation, University of Kent, Giles Lane, Canterbury CT2 7NZ, United Kingdom
| | - Diego Dreossi
- Elettra Sincrotrone Trieste SCpA, SS 14 Area Science Park, Basovizza, Trieste 34149 Italy
| | - Lucia Mancini
- Elettra Sincrotrone Trieste SCpA, SS 14 Area Science Park, Basovizza, Trieste 34149 Italy
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5
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Mahoney P, McFarlane G, Smith BH, Miszkiewicz JJ, Cerrito P, Liversidge H, Mancini L, Dreossi D, Veneziano A, Bernardini F, Cristiani E, Behie A, Coppa A, Bondioli L, Frayer DW, Radovčić D, Nava A. Growth of Neanderthal infants from Krapina (120-130 ka), Croatia. Proc Biol Sci 2021; 288:20212079. [PMID: 34814754 PMCID: PMC8611323 DOI: 10.1098/rspb.2021.2079] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/01/2021] [Indexed: 12/14/2022] Open
Abstract
Modern humans have a slow and extended period of childhood growth, but to what extent this ontogenetic pathway was present in Neanderthals is debated. Dental development, linked to the duration of somatic growth across modern primates, is the main source for information about growth and development in a variety of fossil primates, including humans. Studies of Neanderthal permanent teeth report a pace of development either similar to recent humans or relatively accelerated. Neanderthal milk teeth, which form and emerge before permanent teeth, provide an opportunity to determine which pattern was present at birth. Here we present a comparative study of the prenatal and early postnatal growth of five milk teeth from three Neanderthals (120 000-130 000 years ago) using virtual histology. Results reveal regions of their milk teeth formed quickly before birth and over a relatively short period of time after birth. Tooth emergence commenced towards the earliest end of the eruption schedules displayed by extant human children. Advanced dental development is consistent with expectations for Neanderthal infant feeding.
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Affiliation(s)
- Patrick Mahoney
- Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Gina McFarlane
- Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - B. Holly Smith
- Center for the Advanced Study of Human Paleobiology, The George Washington University, Washington, DC, USA
- Museum of Anthropological Archaeology. The University of Michigan, Ann Arbor, MI, USA
| | - Justyna J. Miszkiewicz
- School of Archaeology and Anthropology, Australian National University, Canberra, ACT 2601, Australia
- School of Social Science, The University of Queensland, St Lucia 4072, Australia
| | - Paola Cerrito
- Department of Anthropology, New York University, New York, NY, USA
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, NY, USA
| | - Helen Liversidge
- Institute of Dentistry, Queen Mary, University of London, Turner Street, London
| | - Lucia Mancini
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, 34149, Italy
| | - Diego Dreossi
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, 34149, Italy
| | - Alessio Veneziano
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, 34149, Italy
- Department of Archaeology, University of Cambridge, Cambridge, UK
| | - Federico Bernardini
- Department of Humanistic Studies, Università Ca’ Foscari Venezia, Italy
- Multidisciplinary Laboratory, Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | - Emanuela Cristiani
- Diet and ANcient TEchnology Laboratory, Department of Maxillo-Facial Sciences, Sapienza University of Rome, Rome, 00185, Italy
| | - Alison Behie
- School of Archaeology and Anthropology, Australian National University, Canberra, ACT 2601, Australia
| | - Alfredo Coppa
- Dipartimento di Biologia Ambientale, Università di Roma ‘La Sapienza’, Rome, 00185, Italy
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
| | - Luca Bondioli
- Servizio di Bioarcheologia, Museo delle Civiltà, Rome, 00144, Italy
- Dipartimento di Beni Culturali, Università di Padova, Padua, 35139, Italy
- Dipartimento di Beni Culturali, Università di Bologna, Ravenna, 48100, Italy
| | - David W. Frayer
- Department of Anthropology, University of Kansas, 622 Fraser Hall, Lawrence, KS, USA
| | - Davorka Radovčić
- Department of Geology and Paleontology, Croatian Natural History Museum, Zagreb, Croatia
| | - Alessia Nava
- Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
- Diet and ANcient TEchnology Laboratory, Department of Maxillo-Facial Sciences, Sapienza University of Rome, Rome, 00185, Italy
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6
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McFarlane G, Loch C, Guatelli-Steinberg D, Bayle P, Le Luyer M, Sabel N, Nava A, Floyd B, Skinner M, White S, Pitfield R, Mahoney P. Enamel daily secretion rates of deciduous molars from a global sample of children. Arch Oral Biol 2021; 132:105290. [PMID: 34695672 DOI: 10.1016/j.archoralbio.2021.105290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To investigate and describe the variation in enamel daily secretion rates (DSRs) of naturally exfoliated deciduous molars (n = 345) from five modern-day populations (Aotearoa New Zealand, Britain, Canada, France, and Sweden). DESIGN Each tooth was thin sectioned and examined using a high-powered Olympus BX51 microscope and DP25 digital microscope camera. Mean DSRs were recorded for the inner, mid, and outer regions of cuspal and lateral enamel, excluding enamel nearest the enamel-dentin junction and at the outermost crown surface. RESULTS Mean DSRs did not vary significantly between populations, or by sex. Cuspal enamel grew slightly faster than lateral enamel (mean difference 0.16 µm per day; p < 0.001). The trajectory of DSRs remained relatively constant from inner to outer cuspal enamel and increased slightly in lateral enamel (p = 0.003). CONCLUSIONS The DSRs of deciduous molars from modern-day children are remarkably consistent when compared among populations. While growth rates are faster in cuspal than lateral enamel, the trajectory of enamel formation changes only slightly from inner to outer regions. The trajectory of DSRs for deciduous molars differs to that of permanent molar enamel, which typically display a steep increase in matrix deposition from inner to outer enamel.
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Affiliation(s)
- Gina McFarlane
- Human Osteology Lab, School of Anthropology and Conservation, University of Kent, Canterbury, UK.
| | - Carolina Loch
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | | | | | - Mona Le Luyer
- Univ. Bordeaux, CNRS, MC, UMR 5199 PACEA, Pessac, France
| | - Nina Sabel
- Department of Pedodontics, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Alessia Nava
- Human Osteology Lab, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Bruce Floyd
- School of Social Sciences, University of Auckland, New Zealand
| | - Mark Skinner
- Department of Archaeology, Simon Fraser University, Burnaby, Canada
| | - Sophie White
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Rosie Pitfield
- Human Osteology Lab, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Patrick Mahoney
- Human Osteology Lab, School of Anthropology and Conservation, University of Kent, Canterbury, UK
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Abstract
The early onset of weaning in modern humans has been linked to the high nutritional demand of brain development that is intimately connected with infant physiology and growth rate. In Neanderthals, ontogenetic patterns in early life are still debated, with some studies suggesting an accelerated development and others indicating only subtle differences vs. modern humans. Here we report the onset of weaning and rates of enamel growth using an unprecedented sample set of three late (∼70 to 50 ka) Neanderthals and one Upper Paleolithic modern human from northeastern Italy via spatially resolved chemical/isotopic analyses and histomorphometry of deciduous teeth. Our results reveal that the modern human nursing strategy, with onset of weaning at 5 to 6 mo, was present among these Neanderthals. This evidence, combined with dental development akin to modern humans, highlights their similar metabolic constraints during early life and excludes late weaning as a factor contributing to Neanderthals' demise.
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8
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Kierdorf H, Witzel C, Bocaege E, Richter T, Kierdorf U. Assessment of physiological disturbances during pre- and early postnatal development based on microscopic analysis of human deciduous teeth from the Late Epipaleolithic site of Shubayqa 1 (Jordan). AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 174:20-34. [PMID: 33017861 DOI: 10.1002/ajpa.24156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 09/12/2020] [Accepted: 09/19/2020] [Indexed: 01/27/2023]
Abstract
OBJECTIVES To study pre- and early postnatal tooth formation and to analyze the effects of physiological disturbances on enamel and dentin formation in deciduous teeth of infants from the Late Epipaleolithic (Natufian) site Shubayqa 1. MATERIALS AND METHODS Ten deciduous teeth from six infants (ages at death between 21 and 239 days) were analyzed by light and scanning electron microscopy. RESULTS Marked prism cross-striations and an abnormal wavy course of the prisms were recorded in pre- and postnatal enamel of all analyzed teeth. Single or multiple accentuated incremental lines were observed in prenatal enamel of nine teeth and in postnatal enamel of eight teeth. Accentuated Andresen lines and broader zones exhibiting an enhanced calcospheritic pattern were recorded in the pre- and postnatally formed dentin of nine teeth. DISCUSSION The structural abnormalities in the pre- and postnatally formed enamel of the infants are considered indicative of chronic stress that negatively affected the activity of secretory ameloblasts. The structural aberrations in pre- and postnatal dentin denote that odontoblasts were also affected by this stress. The presence of single or multiple accentuated incremental lines in pre- and postnatal enamel is interpreted as reflecting (short-term) impacts of higher intensity superimposed on the chronic stress. Our findings suggest compromised maternal health affecting the late fetus and compromised health in newborns. Although limited by the small number of analyzed individuals, the present study contributes to the knowledge of maternal and early infant health conditions in Late Epipaleolithic populations.
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Affiliation(s)
- Horst Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | - Carsten Witzel
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | - Emmy Bocaege
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Tobias Richter
- Department of Cross-cultural and Regional Studies, University of Copenhagen, Copenhagen, Denmark
| | - Uwe Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
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9
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de Andrade Dantas EL, de Figueiredo JT, Macedo-Ribeiro N, Oliezer RS, Gerlach RF, de Sousa FB. Variation in mineral, organic, and water volumes at the neonatal line and in pre- and postnatal enamel. Arch Oral Biol 2020; 118:104850. [PMID: 32736142 DOI: 10.1016/j.archoralbio.2020.104850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/30/2020] [Accepted: 07/19/2020] [Indexed: 11/29/2022]
Abstract
OBJETIVES The neonatal line (NNL) in enamel is hypomineralized, but quantitative data on the enamel component volumes of the NNL are lacking. This study aimed at quantifying the variation in the mineral, organic, and water volumes at the NNL and in pre- and postnatal enamel. MATERIALS AND METHODS In buccal enamel longitudinal ground sections of exfoliated primary incisors (upper and lower; n = 17), the enamel component volumes were quantified at five histological sites (located at 40 μm intervals along a transversal line): the NNL, two sites in prenatal enamel, and two sites in postnatal enamel. Mineral volume was quantified using microradiography, and non-mineral volumes were quantified using polarizing microscopy. RESULTS Differences in component volumes between the NNL and pre- and postnatal enamel had high effect sizes (Hedge's G ranging from 0.89, for the water volume, to 1.88, for the mineral volume; power > 90 %). The distance from the NNL correlated with the normalized component volume: r = 0.459, 95 % CI = 0.274/0.612 (mineral); r = -0.504; 95 % CI= -0.328/-0.647 (organic), and r = -0.294; 95 % CI= -0.087/-0.476 (water). Approaching the NNL from postnatal enamel, the percentage differences in component volumes were: -1.93 to -3.22 % for the mineral volume, +21.26 to +35.42 % for the organic volume, and +3.86 to +6.03 % for the water volume. Towards postnatal enamel, the percentage differences had the opposite trend. CONCLUSIONS The enamel NNL is slightly hypomineralized with an increased organic volume one order of magnitude higher than the percentage differences in both mineral and water volumes.
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Affiliation(s)
- Eugênia Lívia de Andrade Dantas
- Graduate Program in Dentistry, Health Sciences Center, Federal University of Paraiba, Cidade Universitária, 58051-900, João Pessoa, Paraiba, Brazil
| | - Jonas Tostes de Figueiredo
- Department of Basic and Oral Biology, Faculty of Dentistry of Ribeirao Preto, University of São Paulo (FORP/USP), Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Natália Macedo-Ribeiro
- Department of Basic and Oral Biology, Faculty of Dentistry of Ribeirao Preto, University of São Paulo (FORP/USP), Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Renê Seabra Oliezer
- Department of Basic and Oral Biology, Faculty of Dentistry of Ribeirao Preto, University of São Paulo (FORP/USP), Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Raquel Fernanda Gerlach
- Department of Basic and Oral Biology, Faculty of Dentistry of Ribeirao Preto, University of São Paulo (FORP/USP), Ribeirão Preto, 14040-904, São Paulo, Brazil
| | - Frederico Barbosa de Sousa
- Graduate Program in Dentistry, Health Sciences Center, Federal University of Paraiba, Cidade Universitária, 58051-900, João Pessoa, Paraiba, Brazil; Department of Morphology, Health Science Center, Federal University of Paraiba, Cidade Universitária, 58051-900, João Pessoa, Paraiba, Brazil.
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10
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Dean MC, Humphrey L, Groom A, Hassett B. Variation in the timing of enamel formation in modern human deciduous canines. Arch Oral Biol 2020; 114:104719. [DOI: 10.1016/j.archoralbio.2020.104719] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/07/2020] [Accepted: 04/05/2020] [Indexed: 01/17/2023]
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11
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Hassett BR, Dean MC, Ring S, Atkinson C, Ness AR, Humphrey L. Effects of maternal, gestational, and perinatal variables on neonatal line width observed in a modern UK birth cohort. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 172:314-332. [DOI: 10.1002/ajpa.24042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 02/06/2020] [Accepted: 02/26/2020] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Susan Ring
- Bristol Medical School, University of Bristol Bristol UK
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Aris C, Mahoney P, O'Hara MC, Deter C. Enamel thickness and growth rates in modern human permanent first molars over a 2000 year period in Britain. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 173:141-157. [PMID: 32078160 DOI: 10.1002/ajpa.24026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 11/25/2019] [Accepted: 02/04/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVES This study explores variation and trends in first molar enamel thickness and daily enamel secretion rates over a 2000 year period in Britain. METHODS Permanent first molars (n = 89) from the Roman, Anglo-Saxon, and Medieval periods, as well as modern-day Britain, were analyzed using standard histological methods. Relative enamel thickness (RET) and linear measurements of cuspal and lateral thickness were calculated for mesial cusps. Daily secretion rates (DSRs) were calculated for inner, mid, and outer enamel regions in both cuspal and lateral enamel. Significant differences and trends were identified between samples using nonparametric statistical tests. RESULTS Enamel thickness differed between some populations, but no temporal trends were identified. Early Anglo-Saxon molars had significantly thinner RET than both Late Anglo-Saxon (p < .00) and Medieval (p < .00) molars. Lateral enamel from the Roman molars was significantly thinner than the modern-day sample (p = .04). In contrast, a significant slowing trend in DSRs was observed across the more ancient to modern-day samples in every measured region except the mid-lateral enamel region. DISCUSSION This study presents the first evidence for a gradual slowing in the daily rate that enamel is secreted in molars over the past 2000 years in Britain. However, this trend was not matched by consistent or significant positive or negative shifts in enamel thickness. These findings suggest that modern human molars of similar enamel thickness, from different modern and ancient populations, formed at different rates.
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Affiliation(s)
- Christopher Aris
- Human Osteology Lab, Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Patrick Mahoney
- Human Osteology Lab, Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Mackie C O'Hara
- Department of Anthropology, The Ohio State University, Columbus, Ohio
| | - Chris Deter
- Human Osteology Lab, Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
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Maximum length of deciduous dentition as an indicator of age during the first year of life: Methodological validation in a contemporary osteological collection. Forensic Sci Int 2019; 303:109928. [PMID: 31493659 DOI: 10.1016/j.forsciint.2019.109928] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 08/07/2019] [Accepted: 08/09/2019] [Indexed: 11/23/2022]
Abstract
Out of all the available methods for estimating age at death from immature human skeletal remains, those based on odontometric variables of deciduous dentition have proved to be one of the most accurate. The development of odontometric methods has been improved through the creation of documented human osteological collections, allowing their validation in different populations. The present study aims to test the regression equations for age estimation proposed by Liversidge et al. 1993, Irurita Olivares et al. 2014, and Cardoso et al. 2019, on the basis of the maximum length of deciduous teeth in an Argentinian sample of 35 infants of known age at death. The results showed that the absolute mean difference between estimated and chronological age was 5.76±6.33 weeks for Liversidge's method, 5.71±6.41 weeks for Irurita Olivares's method, and 6.79±5.80 for Cardoso's method. It was also found that, for Liversidge's method, the canines provided the most accurate and the least biased estimations. For Irurita Olivares's method, mandibular anterior teeth were the most accurate, while the first mandibular molars offered the least biased estimations. For Cardoso's method, the canines presented the most accurate estimations, while the lateral incisors the least biased ones. Finally, 95% confidence intervals of estimated ages were calculated for each method, finding that Irurita Olivares's method provided the most reliable age estimations when using mandibular central incisors and mandibular first molars.
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14
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Dean MC, Spiers KM, Garrevoet J, Le Cabec A. Synchrotron X-ray fluorescence mapping of Ca, Sr and Zn at the neonatal line in human deciduous teeth reflects changing perinatal physiology. Arch Oral Biol 2019; 104:90-102. [PMID: 31176148 DOI: 10.1016/j.archoralbio.2019.05.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/06/2019] [Accepted: 05/21/2019] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Our first objective was to review the evidence describing the appearance and microstructure of the neonatal line in human deciduous teeth and to link this with known changes in neonatal physiology occurring at and around birth. A second objective was to explore ways to improve identification of the neonatal line by mapping the pre- and postnatal distribution of Ca, Sr and Zn in deciduous cuspal enamel and superimposing these maps onto transmitted light micrographs that included a clear true section of the neonatal line. MATERIALS AND METHODS We used synchrotron X-ray fluorescence to map elemental distributions in pre- and postnatal enamel and dentine. Two deciduous canines and 5 deciduous molars were scanned with an X-ray beam monochromatised to 17.0 keV at either 10.0, 2.5 or 1.0 μm resolution and 10 ms integration time. RESULTS Calcium maps distinguished enamel and dentine but did not clearly demarcate tissues formed pre- or postnatally. Strontium maps reflected presumed pre- and postnatal maternal serum levels and what are likely to be diet-dependent regions of Sr enrichment or depletion. Prenatal Zn maps, particularly for dentine, mirror elevated levels in the fetus and in colostrum during the first few days of life. CONCLUSIONS The neonatal line, enamel dentine junction and surface enamel were all Zn-rich. Within the neonatal line Zn may be associated with increased crystallinity but also with caries resistance, both of which have been reported previously. Elemental mapping may improve the identification of ambiguous NNLs and so be useful in forensic and archaeological studies.
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Affiliation(s)
- M Christopher Dean
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK; Department of Earth Sciences, Centre for Human Evolution Research, Natural History Museum, Cromwell Road, London SW7 5BD, UK.
| | - Kathryn M Spiers
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Jan Garrevoet
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Adeline Le Cabec
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, D-04103 Leipzig, Germany
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Nava A, Coppa A, Coppola D, Mancini L, Dreossi D, Zanini F, Bernardini F, Tuniz C, Bondioli L. Virtual histological assessment of the prenatal life history and age at death of the Upper Paleolithic fetus from Ostuni (Italy). Sci Rep 2017; 7:9427. [PMID: 28842603 PMCID: PMC5572742 DOI: 10.1038/s41598-017-09773-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/31/2017] [Indexed: 01/08/2023] Open
Abstract
The fetal remains from the Ostuni 1 burial (Italy, ca 27 ka) represent a unique opportunity to explore the prenatal biological parameters, and to reconstruct the possible patho-biography, of a fetus (and its mother) in an Upper Paleolithic context. Phase-contrast synchrotron X-ray microtomography imaging of two deciduous tooth crowns and microfocus CT measurements of the right hemimandible of the Ostuni 1b fetus were performed at the SYRMEP beamline and at the TomoLab station of the Elettra - Sincrotrone laboratory (Trieste, Italy) in order to refine age at death and to report the enamel developmental history and dental tissue volumes for this fetal individual. The virtual histology allowed to estimate the age at death of the fetus at 31–33 gestational weeks. Three severe physiological stress episodes were also identified in the prenatal enamel. These stress episodes occurred during the last two months and half of pregnancy and may relate to the death of both individuals. Compared with modern prenatal standards, Os1b’s skeletal development was advanced. This cautions against the use of modern skeletal and dental references for archaeological finds and emphasizes the need for more studies on prenatal archaeological skeletal samples.
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Affiliation(s)
- Alessia Nava
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Rome, Italy. .,Servizio di Bioarcheologia, Museo delle Civiltà, Rome, Italy.
| | - Alfredo Coppa
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Rome, Italy
| | - Donato Coppola
- Università degli Studi di Bari "Aldo Moro", Bari, Italy.,Museo di Civiltà Preclassiche della Murgia Meridionale, Ostuni, Italy
| | - Lucia Mancini
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy
| | - Diego Dreossi
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy
| | - Franco Zanini
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy
| | - Federico Bernardini
- Centro Fermi, Museo Storico della Fisica e Centro di Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Roma, Italy.,Multidisciplinary Laboratory, The "Abdus Salam" International Centre for Theoretical Physics, Strada Costiera 11, 34014, Trieste, Italy
| | - Claudio Tuniz
- Centro Fermi, Museo Storico della Fisica e Centro di Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Roma, Italy.,Multidisciplinary Laboratory, The "Abdus Salam" International Centre for Theoretical Physics, Strada Costiera 11, 34014, Trieste, Italy.,Centre for Archaeological Science, University of Wollongong, Northfields Ave, Wollongong, NSW 2522, Australia
| | - Luca Bondioli
- Servizio di Bioarcheologia, Museo delle Civiltà, Rome, Italy
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