Abstract
The distribution of tetracycline and simultaneously injected45CaCl2 has been studied in the developing teeth of rats by means of fluorescence microscopy and autoradiography. Both substances accumulated in the developing enamel, but there were great differences in their distributions. The distribution of45Ca supports the theory of two stages in the mineralization and tetracycline seemed mainly to be associated with the primary stage.
Shortly after injection, both tetracycline and45Ca accumulated in a superficial zone in newly-deposited enamel matrix. In addition,45Ca was taken up throughout the wole thickness of other areas of the enamel with no corresponding accumulation of tetracycline. This uptake of45Ca was localized occlusally of the superficial zone. Between these two areas there was a superficial zone of increased fluorescence and autoradiographic blackening.
The distribution of45Ca in the enamel remained unchanged during the four days of investigation. The distribution of tetracycline, however, was markedly changed with time. One day after injection there was a considerable increase in fluorescence in the whole thickness of the enamel. It then gradually decreased, and the extinction seemed to start at the tips of the cusps and proceed cervically. After four days fluorescence could be seen mainly in the cervical parts of the enamel.
Résumé
La répartition de la tétracycline et du45CaCl2, injectés simultanément, a été étudiée dans les dents de rats en voie de développement, à l'aide de la microscopie à fluorescence et de l'autoradiographie. Ces deux substances s'accumulent dans l'émail, mais il existe une grande différence de distribution. La répartition du45Ca confirme la théorie des deux étapes de minéralisation et la tétracycline paraît surtout associée avec la première phase.
Peu de temps après l'injection, la tétracycline et le45Ca accumulent dans une zone superficielle de matrice d'émail, venant d'être formée. De plus le45Ca est déposé dans toute l'épaisseur de certaines parties de l'émail: il n'en est pas de même pour la tétracycline. Cette accumulation de45Ca est située de côté occlusal de la zone superficielle. Entre ces deux régions, on note une zone superficielle de fluorescence augmentée et de noircissement autoradiographique.
La répartition du45Ca reste identique pendant les quatre jours d'étude. Cependant la distribution de la tétracycline est nettement modifiée. Un jour après l'injection, il y a une augmentation nette de la fluorescence dans toute l'épaisseur de l'émail. Puis elle décroit graduellement, et cette diminution débute au sommet des cuspides, puis progresse du côté cervical. Après quatre jours, la fluorescence s'observe principalement dans les régions cervicales de l'émail.
Zusammenfassung
Mittels Fluoreszenzmikroskopie und Autoradiographie wurde die Verteilung von Tetracyclin und gleichzeitig injiziertem Ca45Cl4 bei im Wachstum stehenden Rattenzähnen studiert. Beide Substanzen sammelten sich im gebildeten Zahnschmelz an, zeigten aber große Unterschiede in ihrer Verteilung. Die Verteilung von Ca45 ist im Einklang mit der Theorie von zwei Mineralisationsstufen; Tetracyclin scheint größtenteils mit der ersten Stufe verbunden zu sein
Kurz nach der Injektion waren beide, Tetracyclin und Ca45 in einer oberflächlichen Zone der frischgebildeten Schmelzmatrix angereichert. Außerdem wurde Ca45 durch die ganze Dicke der anderen Schmelzschichten aufgenommen, ohne entsprechende Tetracyclinanreicherung. Diese Ca45-Aufnahme wurde an den Okklusionsstellen der oberflächlichen Zone lokalisiert. Zwischen beiden Flächen entstand eine oberflächliche Zone mit erhöhter Fluoreszenz und autoradiographischer Schwärzung.
Die Ca45-Verteilung im übrigen Zahnschmelz blieb während der 4tägigen Untersuchungszeit unverändert. Dagegen war die Tetracyclin verteilung zeitlich merklich verändert. Ein Tag nach der Injektion entstand eine starke Fluoreszenzzunahme in der ganzen Schmelzschicht. Danach nahm sie graduell ab. Das Verschwinden scheint an den Spitzen der Zhanhöcker zu beginnen und gegen den Zahnhals fortzuschreiten. Nach 4 Tagen wurde die Fluoreszenz vorwiegend im Schmelz der Zahnhalspartie sichtbar.
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References
André, T.: Studies on the distribution of tritium-labelled dihydrostreptomycin and tetracycline in the body. Acta radiol. Suppl.142, 1–89 (1956).
Antalowská, Z.: Laws of tetracycline antibiotic deposition in rat incisor. J. dent. Res.45, 1430–1438 (1966).
Appelgren, L.-E., Y. Ericsson, andS. Ullberg: A comparison of the distribution of radioactive fluorine and calcium by use of double-isotope autoradiography. Acta physiol. scand.53, 339–347 (1961).
Bélanger, L. F.: The mineralization of rat enamel in the light of Ca45 autoradiography and microincineration. J. dent. Res.36, 595–601 (1957).
Bevelander, G.: The effect of tetracycline on mineralization and growth. Adv. oral Biol.1, 205–223 (1965).
—, andH. Nakahara: Correlation between tetracycline binding and mineralization in dentin and enamel. Anat. Rec.153, 141–147 (1965).
—,G. K. Rolle, andS. G. Cohlan: The effect of the administration of tetracycline on the development of teeth. J. dent. Res.40, 1020–1024 (1961).
Blomqvist, L., andÅ. Hanngren: Fluorescence technique applied to whole body sections for distribution studies of tetracyclines. Biochem. Pharmacol.15, 215–219 (1966).
Blomqvist, L., Å. Hanngren: Comparison of the autoradiographic distribution of radiocalcium and the fluorographic distribution of demethylchlortetracycline in whole body sections of tumor-bearing mice. Acta med. scand. (in press) (1967).
Brázda, O., J. Kolc, andV. Zástava: Deposition of tetracycline in hard dental tissues. Antibiotics-advances in research, production and clinical use. Proc. Congr. on antibiotics, Prague 1964. (M. Herold andZ. Gabriel, eds.), p. 397–400. London: Butterworths & Co. 1966.
Crabb, H. S. M., andA. I. Darling: The pattern of progressive mineralization in human dental enamal. International series of monographs on oral biology, vol. 2. London: Pergamon Press 1962.
Davies, P. A., Little, K., andW. Aherne: Tetracyclines and yellow teeth. Lancet1962 I, 743.
Eger, W., H. Kämmerer u.G. Bothmann: Experimentelle Beiträge zur Tetrazyklinablagerung in den Zähnen. Dtsch. zahnärztl. Z.20, 828–839 (1965).
Frost, H. M., andA. R. Villaneuva: Tetracycline staining of newly forming bone and mineralizing cartilagein vivo. Stain Technol.35, 135–138 (1960).
Greulich, F. C., andH. C. Slavkin: Amino acid utilization in the synthesis of enamel and dentin matrices as visualized by autoradiography. In: The use of radioautography in investigating protein synthesis. (C. P. Leblond andK. B. Warren, eds.), p. 199–214. London: Academic Press 1965.
Hamp, S.-E.: The tetracyclines and their effect on teeth. Odont. T.75, 33–49 (1967).
Harcourt, J. K.: Tetracyclines and tooth structure in man. J. dent. Res.42, 5 (1963).
—,N. W. Johnson, andE. Storey: In vivo incorporation of tetracycline in the teeth of man. Arch. oral Biol.7, 431–437 (1962).
Harris, W. H., R. H. Jackson, andJ. Jowsey: The in vivo distribution of tetracycline in canine bone. J. Bone Jt. Surg.44 (A), 1308–1320 (1962).
Hwang, W. S. S., E. A. Tonna, andE. P. Cronkite: An autoradiographic study of the mouse incisor using tritiated histidine. Arch. oral Biol.8, 377–385 (1963).
Johnson, N. W.: The distribution and stability of tetracyclines in dental tissues. Antibiotics-advances in research, production and clinical use. Proc. Congr. on antibiotics, Prague 1964. (M. Herold andZ. Gabriel, eds.), p. 378–391. London: Butterworths & Co. 1966.
Kvaal, K.: Tetracyclinenes bivirkninger på tenner og knokler hos barn. T. norske Lægeforen.85, 181–184 (1965).
Likins, R. C., andG. A. Pakis: Bone growth and uptake of radiocalcium in tetracyclinetreated rats. Nature (Lond.)203, 1069–1070 (1964).
Marsland, E. A.: A histological communication of amelogenesis in rats, part II. Maturation. Brit. dent. J.92, 109–119 (1962).
Milch, R. A., J. E. Tobie, andR. A. Robinson: A microscopic study of tetracycline localization in skeletal neoplasms. J. Histochem. Cytochem.9, 261–270 (1961).
Nylén, M. U., K. Å. Omnell, andC. G. Löfgren: Fine structure of tetracycline-induced hypoplastic and hypomineralized defects in rat incisor enamel. J. dent. Res.43, 850 (1964).
Orban, B., H. Sicher, andJ. P. Weinmann: Amelogenesis. J. Amer. Coll. Dent.10, 13–22 (1943).
Owen, L. N.: The effects of administering tetracyclines to young dogs with particular reference to localization of the drugs in the teeth. Arch. oral Biol.8, 715–727 (1963).
Sternberg, J.: Effect of tetracyclines on the turnover of calcium-45 in young rats. Int. J. appl. Radiat.17, 497–512 (1966).
Storey, E.: Tetracycline antibiotics and their effects on calcified and noncalcified tissues. Austr. Ann. Med.12, 325–332 (1963).
Ullberg, S.: Studies on the distribution and fate of S35-labelled benzyl-penicillin in the body. Acta radiol. Suppl. 118 (1954).
Ullberg, S.: Autoradiographic studies on the distribution of labelled drugs in the body. 2nd U.N. Int. Conf. Peaceful Uses of Atomic Energy, vol. 24, p. 248–254. Isotopes in Biochemistry and Physiology, Part 1, 1958.
Wallman, I. S., andH. B. Hilton: Teeth pigmented by tetracycline. Lancet1962I, 827–829.
Weyman, J., andJ. R. Porteous: Discoloration of teeth possibly due to administration of tetracyclines. Brit. dent. J.113, 51–54 (1962).
——: Tetracycline discoloration and bands in human teeth. Brit. dent. J.115, 499–502 (1963).
Witkop, C. J., andR. O. Wolf: Hypoplasia and intrinsic staining of enamel following tetracycline therapy. J. Amer. med. Ass.185, 1008–1011 (1963).
Young, R. W., andR. C. Greulich: Distinctive autoradiographic patterns of glycine incorporation in rat enamel and dentine matrices. Arch. oral Biol.8, 509–521 (1963).
Zegarelli, E. V., C. R. Denning, A. H. Kutscher, F. Touti, andP. A. Dr Sant'Agnese: Discoloration of the teeth in patients with cystic fibrosis of the pancreas. N.Y. St. dent. J.27, 237–238 (1961).
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Hammarström, L. Different localization of tetracycline and simultaneously injected radiocalcium in developing enamel. Calc. Tis Res. 1, 229–242 (1967). https://doi.org/10.1007/BF02008094
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DOI: https://doi.org/10.1007/BF02008094