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Age-related changes in the tooth-bone interface area of acrodont dentition in the chameleon
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SYSNO ASEP 0468143 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Age-related changes in the tooth-bone interface area of acrodont dentition in the chameleon Tvůrce(i) Dosedělová, Hana (UZFG-Y)
Štěpánková, K. (CZ)
Zikmund, T. (CZ)
Lesot, H. (FR)
Kaiser, J. (CZ)
Novotný, K. (CZ)
Štembírek, Jan (UZFG-Y) ORCID
Knotek, Z. (CZ)
Zahradníček, Oldřich (UEM-P) RID
Buchtová, Marcela (UZFG-Y) RID, ORCIDZdroj.dok. Journal of Anatomy. - : Wiley - ISSN 0021-8782
Roč. 229, č. 3 (2016), s. 356-368Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Chamaeleo-cylyptratus ; tongue projection ; veiled chameleon Vědní obor RIV EA - Morfologické obory a cytologie CEP GB14-37368G GA ČR - Grantová agentura ČR GP14-29273P GA ČR - Grantová agentura ČR Institucionální podpora UZFG-Y - RVO:67985904 ; UEM-P - RVO:68378041 UT WOS 000383724300002 EID SCOPUS 84982933436 DOI 10.1111/joa.12490 Anotace Chameleon teeth develop as individual structures at a distance from the developing jaw bone during the pre-hatching period and also partially during the post-hatching period.However, in the adult, all teeth are fused together and tightly attached to the jaw bone by mineralized attachment tissue to form one functional unit.Tooth to bone as well as tooth to tooth attachments are so firm that if injury to the oral cavity occurs, several neighbouring teeth and pieces of jaw can be broken off. We analysed age-related changes in chameleon acrodont dentition, where ankylosis represents a physiological condition, whereas in mammals, ankylosis only occurs in a pathological context. The changes in hard-tissue morphology and mineral composition leading to this fusion were analysed. For this purpose, the lower jaws of chameleons were investigated using X-ray micro-computed tomography, laser-induced breakdown spectroscopy and microprobe analysis. For a long time, the dental pulp cavity remained connected with neighbouring teeth and also to the underlying bone marrow cavity.Then, a progressive filling of the dental pulp cavity by a mineralized matrix occurred, and a complex network of non-mineralized channels remained. The size of these unmineralized channels progressively decreased until they completely disappeared, and the dental pulp cavity was filled by a mineralized matrix over time.Moreover, the distribution of calcium, phosphorus and magnesium showed distinct patterns in the different regions of the tooth-bone interface, with a significant progression of mineralization in dentin as well as in the supporting bone. In conclusion, tooth-bone fusion in chameleons results from an enhanced production of mineralized tissue during post-hatching development.Uncovering the developmental processes underlying these outcomes and performing comparative studies is necessary to better understand physiological ankylosis; for that purpose, the chameleon can serve as a useful model species. Pracoviště Ústav živočišné fyziologie a genetiky Kontakt Jana Zásmětová, knihovna@iapg.cas.cz, Tel.: 315 639 554 Rok sběru 2017
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