Origin and Evolution of Cementum as Tooth Attachment Complex

Kozawa, Yukishige; Chisaka, Hideki; Iwasa, Yuka; Yokota, Rumi; Suzuki, Kunihiro; Yamamoto, Hitoshi

doi:10.1016/s1349-0079(05)80005-2

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Kozawa et al 16 report that the dermal skeleton of Odontostraci armoured fish is the origin of teeth. They further report that the denticles or dermal teeth show enamel (or enameloid), dentine and lining supporting bone, which are derived from the mesoderm.…”

Section: E Volution and Fun C Tional S I G Nifi C An Ce Of Cementummentioning

confidence: 99%

“…21 In the upper Jurassic Selnhofen deposits (168-165 Ma), histological analyses on undecalcified sections showed extensive trabeculation of cementum thus controlling tooth attachment in Jurassic mosasaurs ( Figure 4D,E). 22 According to Kozawa et al, 16 aspidin is proposed to be the pre- Complexities of the regenerated thecodont attachment apparatus in the non-human primate Chacma baboon Papio ursinus 60 days after implantation of 250 μg of highly purified naturally derived osteogenic proteins purified from bovine bone matrix extracts greater than 70 000 fold. 14,36 Harvested tissues were embedded in K-Plast resins (Medim, Buseck, Germany) and undecalcified sections cut at 3-6 μm with carbide tungsten knives.…”

Section: E Volution and Fun C Tional S I G Nifi C An Ce Of Cementummentioning

confidence: 99%

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Developmental pathways of periodontal tissue regeneration

Ripamonti

2018

J of Periodontal Research

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Nothing is known on the impact of developmental divergence on periodontal tissue regeneration in vertebrate animals. Molecularly, the induction of tooth morphogenesis is highly conserved deploying across animal phyla a constant and reproducible set of gene pathways, which result in morphogenesis of multiple odontode forms and shapes. Genetic mutations positively affect animal speciation via evolving biting and masticatory forces as well as dietary habits selectively imprinted in animal phyla during evolutionary speciation. The geometry of the attachment apparatus of a tooth is important for the interpretation of the induction of cementogenesis with de novo Sharpey's fibres as in thecodonty, ie, a tripartite attachment of alveolar bone, periodontal ligament and cementum. This review addresses the tooth implantation in different animal clades from the fibrous attachment of the Elasmobranch Carcharinus obscurus dusky shark, reviewing the evolution and functional significance of cementum with functionally inserted Sharpey's fibres. In sharks there is a continuous tooth replacement mechanistically supported by the continuously erupting dental lamina. We show that the arching of the continuously erupting dental lamina, a critical step for the selachians' tooth differentiation, is prominently characterized by transforming growth factor-β (TGF-β ) expression not only within the dental lamina but also in cellular condensations in the mesenchymal tissues of the erupting tooth. Such findings indicate the pleiotropic multifaceted activity of a highly conserved mammalian gene across genera, masterminding tooth morphogenesis in both selachians and mammals as well as periodontal tissue induction in the non-human primate Papio ursinus. In P. ursinus, the induction of cementogenesis entails the expression of TGF-β and osteocalcin with fine-tuning and regulation of bone morphogenetic proteins BMP-2 and BMP-7, and upregulation of TGF-β . TGF-β autoinduction and upregulation during the induction of cementogenesis and osteogenesis in P. ursinus provide novel insights into the induction of cementogenesis. It is hypothesized that the evolutionary expression and upregulation of the TGF-β gene may provide the mechanistic insights into the induction of extensive cementogenesis as seen in stem mammals and the induction of trabecular-like cementum formation in mosasaurs' tooth attachment. Aspidin, the precursor of cementum, was reported to appear 310-330 million years ago (Ma) in Odontostraci armoured fish. Studies showed that the differentiation of cementum with inserted Sharpey's fibres is also present in lower amniotes such as Diatectomorpha or Diadectidae, the first herbivorous tetrapods, 323 Ma. In mosasaurs, 168-165 Ma, there is the induction of extensive trabeculation of cementum though nothing is known on the phylogenetic temporo-spatial evolution of cementum before Diadectidae and stem mammals. The large trabeculations of cementum as seen in the attachment of extinct mosasaurs invocates a pleiotropic capacity of cemental growth pre...

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Section: E Volution and Fun C Tional S I G Nifi C An Ce Of Cementummentioning

confidence: 99%

Section: E Volution and Fun C Tional S I G Nifi C An Ce Of Cementummentioning

confidence: 99%

Developmental pathways of periodontal tissue regeneration

Ripamonti

2018

J of Periodontal Research

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Tooth histology in the cretaceous ichthyosaur Platypterygius australis, and its significance for the conservation and divergence of mineralized tooth tissues in amniotes

Maxwell

Caldwell

Lamoureux

2010

Journal of Morphology

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Ichthyosaurs are an extinct group of secondarily aquatic reptiles that show ligamentous tooth attachment to the jaw in some derived forms. Here, we provide a modern description of tooth histology in ichthyosaurs, using Platypterygius australis, a large ichthyosaur from the Cretaceous of Australia. Our study supports evolutionary conservation of the principal mineralized tooth tissue types in amniotes with ligamentous tooth attachment: enamel, dentine, cellular, and acellular cementum. This is the first time that the latter tissue has been located in ichthyosaurs. Vascularized cementum (osteocementum) is reduced or absent in amniotes in which the teeth are ankylosed to the jaw bone, such as basal ichthyosaurs, and raises questions regarding the function of this tissue and the potential developmental or selective conditions leading to its convergent evolution.

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Histology of tooth attachment tissues and plicidentine inVaranus(Reptilia: Squamata), and a discussion of the evolution of amniote tooth attachment

Maxwell

Lamoureux

Budney

2011

Journal of Morphology

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Few recent studies have examined the histological basis for tooth attachment in squamates. In the past few years, a surge of interest in this topic has led to the intriguing suggestion that the major tissues derived from the tooth germ (enamel, dentine, cementum and alveolar bone), are conservative and are present in all amniotes. In this study, we describe the histology and development of the tooth attachment complex in Varanus rudicollis, the rough-neck monitor. We provide the first published evidence for the role of cementum and alveolar bone in tooth attachment in varanoid lizards. In Varanus, cementum is deposited on the external surface of the tooth root as well as at the base of the tooth, where it plays a role in the attachment of the tooth to the jawbone. Alveolar bone is also involved in tooth ankylosis. Our results support the hypothesis that the major tooth germ tissues are found in all amniotes. We provide insights into the structure and development of plicidentine, defined as infolding of the dentine around the tooth base. This feature is unique to varanoids among extant tetrapods and is the third tissue implicated in tooth attachment in Varanus. Plicidentine develops asymmetrically along the labial-lingual axis of a tooth. Varanus is characterized by the presence of both primary and higher-order lamellae, which anastomose to form a honeycomb-like surface that then interacts with the more basal attachment tissues.

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Origin and Evolution of Cementum as Tooth Attachment Complex

Cited by 6 publications

References 12 publications

Developmental pathways of periodontal tissue regeneration

Developmental pathways of periodontal tissue regeneration

Tooth histology in the cretaceous ichthyosaur Platypterygius australis, and its significance for the conservation and divergence of mineralized tooth tissues in amniotes

Histology of tooth attachment tissues and plicidentine inVaranus(Reptilia: Squamata), and a discussion of the evolution of amniote tooth attachment

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