Abstract
The effect of tetracycline hydrochloride (TC) and oxytetracycline (OTC) on rat incisor enamel was compared in studies utilizing microroentgenography and fluorescence microscopy.
Twenty animals received a course of 4 intraperitoneal injections, comprising first 2 low and subsequently 2 high equivalent dosages of the 2 antibiotics (Table 1). The low dosages had little if any effect on the enamel. In contrast, the high dosages of both TC and OTC resulted in developmental disturbances ranging from an incremental band only to one that also included a gross hypoplastic lesion. A comparison between the 2 drugs revealed a much higher incidence of hypoplasias among the defects caused by TC than those due the OTC (Table 2).
Some of the hypoplastic defects exhibited tetracycline fluorescence while others were negative as were the incremental bands and the normal enamel. The labelled lesions included all of those caused by the third and none of those due the fourth injection (Table 2). It is suggested that the fluorescent lesions were labelled by the administration subsequent to the one causing them.
Résumé
L'action du chlorhydrate de tétracycline (TC) et de la oxytétracycline (OTC) sur l'émail de l'incisive du rat est comparée en des études utilisant la microroentgénographie et la microscopie de fluorescence.
Vingt animaux recurent une série de 4 injections intrapéritonéaux, comprenant d'abord 2 dosages faibles et, par la suite, 2 dosages d'équivalence forte des 2 antibiotiques (Tableau 1). Les dosages faibles avaient peu ou prou d'action sur l'émail. Au contraire, les dosages forts du TC et de l'OTC tous les deux aboutirent à troubles évolutifs, ne variant que d'une bande incrémentale jusqu'à une bande que comprenait aussi une grosse lésion hypoplastique. Une comparaison entre les deux medicaments révéla une incidence plus haute de hypoplasies entre les défauts provoqués par le TC que les hypoplasies causées par l'OTC (Tableau 2).
Quelques-uns des défauts hypoplastiques manifestaient la fluorescence de la tétracycline, tandis que d'autres étaient négatifs comme l'étaient les bandes incrémentales et l'émail normal. Les lésions marquées comprenaient toutes celles provoquées par la troisième injection, et aucune d'elles provoquées par la quatrième injection (Tableau 2). Il est évident que les lesions fluorescentes étaient marquées par l'administration de l'injection qui les précède.
Zusammenfassung
Der Einfluß von Tetracyclin Hydrochlorid (TC) und Oxytetracyclin (OTC) auf den Schmelz von Rattenschneidezähnen wurde mit mikro-röntgenologischen und fluorescenz-mikroskopischen Methoden untersucht.
Zwanzig Tiere erhielten zunächst 2 kleinere intraperitoneale Dosen, und danach 2 größere intraperitoneale Dosen der beiden Antibiotica in gleichwertiger Menge (Tabelle 1). Die kleinen Dosen hatten wenig oder keinen Effekt am Zahnschmelz. Die großen Dosen von TC und OTC dagegen verursachten Entwicklungsstörungen, die von Veränderungen an den Wachstumsbändern bis zu hypoplastischen Herden innerhalb dieser Bänder schwankten. Die vergleichende Auswertung der beiden Medikamente zeigte, daß hypoplastische Herde häufiger nach Verabreichung von TC vorkommen, als nach Verabreichung von OTC.
Manche hypoplastische Herde zeigten Tetracyclin-Fluorescenz; andere Herde, sowohl die Wachstumsbänder als auch der normale Schmelz, waren negativ. Herde mit Fluorescenz waren durch die dritte Injektion verursacht, Herde die nach der vierten Injektion auftraten, zeigten keine Fluorescenz (Tabelle 2). Es ist anzunehmen, daß die Fluorescenz dieser Herde zustande kam, nachdem diese Herde durch die vorausgegangene Injektion verursacht worden waren.
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References
Antalovská, Z.: Laws of tetracycline antibiotic deposition in rat incisors. J. dent. Res.45, 1430–1438 (1966).
Bevelander, G., andH. Nakahara: Correlation between tetracycline binding and mineralization in dentin and enamel. Anat. Rec.153, 141–147 (1965).
——: The effect of diverse amounts of tetracycline on fluorescence and coloration of teeth. J. Pediat.68, 114–120 (1966).
—,G. K. Rolle, andS. Q. Cholan: The effect of the administration of tetracycline on the development of teeth. J. dent. Res.40, 1020–1024 (1961).
Boyde, A.: The structure and development of mammalian enamel, p. 94–102. Thesis. Department of Anatomy, The London Hospital Medical College, Turner Street, London, E. l, 1964.
Eger, W. von, H. Kämmerer, andG. Bothmann: Experimentelle Beiträge zur Tetrazyklin-ablagerung in den Zähnen. Dtsch. zahnärztl. Z.20, 828–839 (1965).
Hakala, P. E., andP. Mäkelä: Tetracycline and prematures. A follow-up study. Suom. Hammaslääk. Toim.59, 284–293 (1963).
Hammarström, L.: Different localization of tetracycline and simultaneously injected radiocalcium in developing enamel. Calc. Tiss. Res.1, 229–242 (1967).
Hamp, S.-E.: The tetracyclines and their effect on teeth. A clinical study. Odont. T.75, 33–48 (1967).
Harcourt, J. K.: Tetracyclines and tooth structure in man. J. dent. Res.42, 5 (1963).
Ibsen, K. R., M. R. Urist andR. F. Sognnaes: Differences among tetracyclines with respect to the staining of teeth. J. Pediat.67, 459–462 (1965).
Kienitz, M.: Tetracycline in Knochen und Zähnen. Dtsch. med. Wschr.90, 1298–1302 (1965).
Kline, A. H., R. J. Blattner, andM. Lunin: Transplacental effect of tetracyclines on teeth. J. Amer. med. Ass.188, 178–180 (1964).
Kowalewska, B., W. Szotowa, andM. Winiarska-Majczyno: Tetracyclines and the teeth. Lancet1966 II, 387.
Lojodice, G., R. Vento, N. A. Cinque, andG. Gilli: Effects of administration of tetracycline on dental and skeletal development in the child. Minerva pediat.17, 1358–1365 (1965).
Lunin, M., andA. H. Kline: The effect of tetracyclines on the teeth of children. Program and abstracts of papers fromIadr's 44th general meeting 1966, abstract No. 468.
Miani, A., andR. Brusati: Studies on histogenetic processes of dental tissues with the method of tetracycline marking in rodents and carnivors. III. Repercussions of tetracycline treatment on enamel increase ofCavia cobaya. Boll. Soc. ital. Biol. sper.39, 1211–1213 (1963).
Nylen, 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).
Omnell, K.-Å, C.-G. Löfgren, andM. U. Nylen: The effect of intraperitoneal injections of tetracycline hydrochloride and oxytetracycline on the enamel of rat incisors. Program and abstracts of papers fromIadr's 44th general meeting 1966, abstract No. 464.
Owen, L. N.: The effect of administering tetracyclines to young dogs with particular reference to localization of the drugs in the teeth. Arch. oral Biol.8, 715–728 (1963).
Saxén, L.: Effect of tetracycline on osteogenesisin vitro. J. exp. Zool.162, 269–294 (1966a).
—: Drug-induced teratogenesisin vitro: Inhibition of calcification by different tetracyclines. Science153, 1384–1386 (1966b).
Storey, E.: Experimental tetracycline administration. J. dent. Res.42, 5 (1963a).
—: Tetracycline antibiotics and their effects on calcified and noncalcified tissues. Aust. Ann. Med.12, 325–332 (1963b).
Suga, S., andM. Katagiri: Mineralization pattern of the hypomineralized rat enamel, induced by NaF and SrCl2 injection. J. dent. Res.46, 134–135 (1967).
—, andY. Murayama: Microradiographical,45Ca autoradiographical and tetracycline labelling studies on the enamel mineralization of guinea pigs molar. Odontology. J. Nippon Dent. Coll.53, 154–162 (1965).
Thanik, D. D., andK. A. McMurphy: Comparison of four tetracycline drugs at four different dose levels and their effect on animal and bone growth. Program and abstracts of papers fromIadr's 44th general meeting 1966, abstract No. 466.
Wallman, I. S., andH. B. Hilton: Teeth pigmented by tetracycline. Lancet1962aI, 827–829.
Wallman, I. S., andH. B. Hilton: Prematurity, tetracycline, and oxytetracycline in tooth development. Lancet1962b II, 720–721.
Weber, D., andJ. A. Yaeger: A microradiographic interpretation of abnormal enamel formation induced by subcutaneous sodium fluoride. J. dent. Res.43, 50–56 (1964).
Weyman, J.: The clinical appearances of tetracycline staining of the teeth. Brit. dent. J.118, 289–291 (1965).
Witkop, C. J., andR. O. Wolf: Hypoplasia and intrinsic staining of enamel following tetracycline therapy. J. Amer. med. Ass.185, 1008–1011 (1963).
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This work was supported by the Swedish Medical Research Council, Project No. 12X-169.
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Löfgren, C.G., Omnell, K.Å. & Nylen, M.U. Effect of intraperitoneal injections of tetracycline hydrochloride and oxytetracycline on forming enamel of rat incisors. Calc. Tis Res. 2, 145–156 (1968). https://doi.org/10.1007/BF02279203
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DOI: https://doi.org/10.1007/BF02279203