Comments on 'Dental lessons from past to present: Ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks' by A. Lübke, J. Enax, K. Loza, O. Prymak, P. Gaengler, H.-O. Fabritius, D. Raabe and M. Epple, RSC Adv., 2015, 5, 61612
| Autor: | M. D. Marin-Monfort, H. Botella, E. Manzanares, M. de Renzi |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
010506 paleontology Enamel paint General Chemical Engineering Fluorapatite Zoology General Chemistry High fluoride 01 natural sciences 03 medical and health sciences chemistry.chemical_compound stomatognathic diseases 030104 developmental biology Tooth mineralization medicine.anatomical_structure chemistry stomatognathic system visual_art Ultrastructure visual_art.visual_art_medium Dentin medicine Primary Tooth Fluoride 0105 earth and related environmental sciences |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | The paper mentioned in the title suggests that several groups of extinct vertebrates used fluoroapatite as a tooth mineral in dentine and enamel when alive; its authors posit that this tooth mineralization drastically changed in all these lineages at some point during their evolution, leading to the use of hydroxyapatite as an alternative primary tooth mineral, because of hitherto unconsidered environmental changes. These conclusions are based on their finding high fluoride levels (i.e. fluoroapatite) in the dentine of fossilised shark teeth as well as in both the dentine and enamel of plesiosaurs, mosasaurs, and dinosaurs, which is in sharp contrast to recent teeth (which contain almost no fluoride in the dentin or enamel; i.e. hydroxyapatite). However, in our opinion, the authors have either obviated or underestimated a process well known to palaeontologists and archaeologists: the fluorine content of fossil teeth and bones increases with age during the course of fossilization because of the diagenetic passage of hydroxyapatite to more stable fluoroapatite. Thus, the aim of this letter is to show that the high fluoride contents found in the questioned paper are due to the diagenetic alteration of fossils, with the goal of avoiding future confusion. This work has been founded by the Spanish Government. Ministerio de Economía y Competitividad. Research Project CGL2014-52662-P. |
| Databáze: | OpenAIRE |
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