Detail publikace

Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon

DOSEDĚLOVÁ, H. ŠTĚPÁNKOVÁ, K. ZIKMUND, T. LESOT, H. KAISER, J. NOVOTNÝ, K. ŠTEMBÍREK, J. KNOTEK, Z. ZAHRADNÍČEK, O. BUCHTOVÁ, M.

Originální název

Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Chameleon teeth develop as individual structures at a distance from the developing jaw bone during the prehatching 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 microcomputed 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.

Klíčová slova

acrodont dentition; laser-induced breakdown spectroscopy; micro-computed tomography; reptiles

Autoři

DOSEDĚLOVÁ, H.; ŠTĚPÁNKOVÁ, K.; ZIKMUND, T.; LESOT, H.; KAISER, J.; NOVOTNÝ, K.; ŠTEMBÍREK, J.; KNOTEK, Z.; ZAHRADNÍČEK, O.; BUCHTOVÁ, M.

Vydáno

1. 9. 2016

ISSN

0021-8782

Periodikum

JOURNAL OF ANATOMY

Ročník

229

Číslo

3

Stát

Spojené království Velké Británie a Severního Irska

Strany od

356

Strany do

368

Strany počet

13

BibTex

@article{BUT130583,
  author="Hana {Dosedělová} and Kateřina {Štěpánková} and Tomáš {Zikmund} and Herve {Lesot} and Jozef {Kaiser} and Karel {Novotný} and Jan {Štembírek} and Zdeněk {Knotek} and Oldřich {Zahradníček} and Marcela {Buchtová}",
  title="Age-related changes in the tooth–bone interface area of acrodont dentition in the chameleon",
  journal="JOURNAL OF ANATOMY",
  year="2016",
  volume="229",
  number="3",
  pages="356--368",
  doi="10.1111/joa.12490",
  issn="0021-8782"
}