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@article{1374291,
author = {Dosedělová, Hana and Štěpánková, Kateřina and Zikmund, Tomáš and Lesot, Herve and Kaiser, Jozef and Novotný, Karel and Štembírek, Jan and Knotek, Zdeněk and Zahradníček, Oldřich and Buchtová, marcela},
article_number = {3},
doi = {http://dx.doi.org/10.1111/joa.12490},
keywords = {acrodont dentition; laser-induced breakdown spectroscopy; micro-computed tomography; reptiles},
language = {eng},
issn = {0021-8782},
journal = {Journal of Anatomy},
title = {Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon},
url = {http://onlinelibrary.wiley.com/doi/10.1111/joa.12490/pdf},
volume = {229},
year = {2016}
}
TY - JOUR
ID - 1374291
AU - Dosedělová, Hana - Štěpánková, Kateřina - Zikmund, Tomáš - Lesot, Herve - Kaiser, Jozef - Novotný, Karel - Štembírek, Jan - Knotek, Zdeněk - Zahradníček, Oldřich - Buchtová, marcela
PY - 2016
TI - Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon
JF - Journal of Anatomy
VL - 229
IS - 3
SP - 356-368
EP - 356-368
PB - John Wiley & Sons
SN - 00218782
KW - acrodont dentition
KW - laser-induced breakdown spectroscopy
KW - micro-computed tomography
KW - reptiles
UR - http://onlinelibrary.wiley.com/doi/10.1111/joa.12490/pdf
N2 - 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.
ER -
DOSEDĚLOVÁ, Hana, Kateřina ŠTĚPÁNKOVÁ, Tomáš ZIKMUND, Herve LESOT, Jozef KAISER, Karel NOVOTNÝ, Jan ŠTEMBÍREK, Zdeněk KNOTEK, Oldřich ZAHRADNÍČEK a marcela BUCHTOVÁ. Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon. \textit{Journal of Anatomy}. John Wiley \&{} Sons, 2016, roč.~229, č.~3, s.~356-368. ISSN~0021-8782. Dostupné z: https://dx.doi.org/10.1111/joa.12490.
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