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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] [MESH Headings] [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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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] [MESH Headings] [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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Mahoney P, McFarlane G, Loch C, White S, Floyd B, Dunn EC, Pitfield R, Nava A, Guatelli-Steinberg D. Dental biorhythm is associated with adolescent weight gain. COMMUNICATIONS MEDICINE 2022; 2:99. [PMID: 36016726 PMCID: PMC9395425 DOI: 10.1038/s43856-022-00164-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 07/26/2022] [Indexed: 12/02/2022] Open
Abstract
Background Evidence of a long-period biological rhythm present in mammalian hard tissue relates to species average body mass. Studies have just begun to investigate the role of this biorhythm in human physiology. Methods The biorhythm is calculated from naturally exfoliated primary molars for 61 adolescents. We determine if the timing relates to longitudinal measures of their weight, height, lower leg length and body mass collected over 14 months between September 2019 to October 2020. We use univariate and multivariate statistical analyses to isolate and identify relationships with the biorhythm. Results Participants with a faster biorhythm typically weigh less each month and gain significantly less weight and mass over 14-months, relative to those with a slower biorhythm. The biorhythm relates to sex differences in weight gain. Conclusions We identify a previously unknown factor that associates with the rapid change in body size that accompanies human adolescence. Our findings provide a basis from which to explore novel relationships between the biorhythm and weight-related health risks.
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Affiliation(s)
- Patrick Mahoney
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Gina McFarlane
- 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
| | - Sophie White
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Bruce Floyd
- School of Social Sciences, University of Auckland, Auckland, New Zealand
| | - Erin C. Dunn
- Department of Psychiatry, Harvard Medical School and the Massachusetts General Hospital, Boston, MA USA
| | - Rosie Pitfield
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Alessia Nava
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Debbie Guatelli-Steinberg
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
- Department of Anthropology, The Ohio State University, Columbus, OH USA
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