DOSEDĚLOVÁ, Hana, Kateřina ŠTĚPÁNKOVÁ, Tomáš ZIKMUND, Herve LESOT, Jozef KAISER, Karel NOVOTNÝ, Jan ŠTEMBÍREK, Zdeněk KNOTEK, Oldřich ZAHRADNÍČEK and marcela BUCHTOVÁ. Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon. Journal of Anatomy. John Wiley & Sons, vol. 229, No 3, p. 356-368. ISSN 0021-8782. doi:10.1111/joa.12490. 2016.
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Basic information
Original name Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon
Authors DOSEDĚLOVÁ, Hana (203 Czech Republic), Kateřina ŠTĚPÁNKOVÁ (203 Czech Republic, belonging to the institution), Tomáš ZIKMUND (203 Czech Republic), Herve LESOT (250 France), Jozef KAISER (203 Czech Republic), Karel NOVOTNÝ (203 Czech Republic, belonging to the institution), Jan ŠTEMBÍREK (203 Czech Republic), Zdeněk KNOTEK (203 Czech Republic), Oldřich ZAHRADNÍČEK (203 Czech Republic) and marcela BUCHTOVÁ (203 Czech Republic, guarantor, belonging to the institution).
Edition Journal of Anatomy, John Wiley & Sons, 2016, 0021-8782.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10406 Analytical chemistry
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 2.182
RIV identification code RIV/00216224:14310/16:00093776
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1111/joa.12490
UT WoS 000383724300002
Keywords in English acrodont dentition; laser-induced breakdown spectroscopy; micro-computed tomography; reptiles
Tags AKR, rivok
Changed by Changed by: Ing. Andrea Mikešková, učo 137293. Changed: 29/3/2017 19:07.
Abstract
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.
Links
LQ1601, research and development projectName: CEITEC 2020 (Acronym: CEITEC2020)
Investor: Ministry of Education, Youth and Sports of the CR
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