The Distribution and Biogenic Origins of Zinc in the Mineralised Tooth Tissues of Modern and Fossil Hominoids: Implications for Life History, Diet and Taphonomy

Teeth begin to grow in the jaws before birth and continue to appear in an overlapping sequence until each is complete in length. Subsequently, the central pulp (nerve) chamber of each tooth slowly fills in with dentine and the root of the tooth continues to accumulate thin layers of cementum until the individual dies. Each of the tooth tissues, the hard enamel cap, the dentine core of the tooth and the root cementum grow incrementally and incorporate small quantities of blood-born trace elements ingested from our diet into their structure. A chronological record of zinc incorporation exists in each tooth tissue and can be visualised in thin sections, or slices, of teeth using a beam of synchrotron light. Zinc markings in teeth are especially useful and occur at birth in enamel and dentine and annually in the cementum layers. This work shows that zinc is consistently concentrated within surface enamel and in the dentine surrounding the central pulp chamber. Knowing where to sample Zn in modern and fossil teeth enables us to reconstruct a chronology of growth and to determine something about diet in the past from the remnants of different Zn isotopes contained in different foodstuffs.

Mots clés

trace elements neonatal line enamel SXRF enamel thickness mineralisation process

Domaines

Anthropologie biologique Archéologie et Préhistoire

Fichier principal

biology-12-01455.pdf (11.52 Mo)

Dean_et_al_2023_Biology_Appendix SA.pdf (4.77 Mo)

Dean_et_al_2023_Biology_Appendix SB.pdf (2.5 Mo)

Dean_et_al_Zn_SOM-Table-S1_2023-07-26.xlsx (654.23 Ko)

Figure-S1_Cuspal_stacked_chart.pdf (127.46 Ko)

Figure-S2_Midlateral_stacked_chart.pdf (124.16 Ko)

Figure-S3_Cervical_stacked_chart.pdf (123.04 Ko)

Figure-S4_Cuspal_stacked_chart_Zn_enathick.pdf (122.61 Ko)

Figure-S5_Midlateral_stacked_chart_Zn_enathick.pdf (123.06 Ko)

Figure-S6_Cervical_stacked_chart_Zn_enathick.pdf (124.94 Ko)

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https://hal.science/hal-04298680

Soumis le : lundi 27 novembre 2023-11:46:01

Dernière modification le : mardi 23 janvier 2024-11:16:03

Dates et versions

hal-04298680 , version 1 (27-11-2023)

Identifiants

HAL Id : hal-04298680 , version 1
DOI : 10.3390/biology12121455

Citer

M Christopher Dean, Jan Garrevoet, Stijn J M van Malderen, Frédéric Santos, Marta Mirazón Lahr, et al.. The Distribution and Biogenic Origins of Zinc in the Mineralised Tooth Tissues of Modern and Fossil Hominoids: Implications for Life History, Diet and Taphonomy. Biology, 2023, Evolutionary Insights into Life History, 12 (12), pp.1455. ⟨10.3390/biology12121455⟩. ⟨hal-04298680⟩

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