Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/588017447f8c9d0a098b4644
Revista de Odontologia da UNESP
Original Article

Administração sistêmica de fluoreto de sódio e a morfologia do primeiro molar de rato (Rattus norvegicus albinus, Holtzman) estudo dimensional em duas gerações

Systemic administration of sodium fluoride and the morphology of the rat first molar tooth (Rattus norvegicus albinus, Holtzman). Dimensional study over two generations

Abbud, R.; Moraes, N.; Rocca, R.A.

Downloads: 0
Views: 1059

Resumo

Foram analisadas comparativamente em duas gerações sucessivas a distância mesio-distal, altura das cúspides e a profundidade dos sulcos mesial, central e distal de 112 primeiros molares inferiores de ratos com 25 dias de idade, cujas mães e ninhadas receberam tratamento com água fluoretada contendo 0,8-0,9 ppm (T1 ), 25 ppm (T2), 50 ppm (T3) ou 100 ppm (T4) de flúor durante os períodos de crescimento (25 a 120 dias), acasalamento, prenhez e lactação. Nas condições experimentais estabelecidas e com base na análise estatística foi lícito concluir que: 1) os tratamentos apresentaram diferentes efeitos sobre as medidas estudadas; 2) o tratamento T2 (25ppmF) de modo geral resultou nos mais elevados valores médios e os menores valores médios observados estiveram sistematicamente associados ao tratamento T4 (1000 ppmF); 3) as diferenças entre os tratamentos foram estatisticamente significantes apenas na 2ª geração, em todas as medidas estudadas, exceto para os sulcos central e distal, onde não houve significância estatística entre efeitos de tratamentos; 4) apenas para a distância mesiodistal foi verificada diferença estatisticamente significante entre sexos quanto ao efeito dos tratamentos. O presente trabalho, quanto aos aspectos estudados, abre perspectivas de novas pesquisas no que se refere aos efeitos do flúor sobre a morfologia dentária e sua possível interação com fatores genéticos.

Abstract

The mesio-distal distance, height of cusps and depth of the mesial, central and distal sulci of 112 first lower molar teeth, of 25-day old albino rats, were comparatively analysed. The mothers and nursings were treated with fluorated water in the concentrations of 0.8-0.9 ppmF (T1) 25 ppmF (T2) 50 ppmF (T3) or 100 ppmF (T4), during the growth periods (25 to 120 days), mating, pregnancy and lactation. ln the stablished experimental conditions and based on statislical analysis we concluded that 1) the treatments presented different effects upon the studied measurements; 2) the treatment T2 (25 ppmF) resulted, in general, in the highest average values and the least observed average values were sistematically associated to treatment T4 (100 ppmF); 3) the differences between treatments were statistically significant only on the central and distal sulci, where statistical significance was not observed among treatments; 4) only for the mesio-distal distance statistically significant differences were noted, among sexes, related to the effect of treatments. The present work, in relation to the variables studied, suggests the need of new researches about the effects of fluoride on the dental morphology and its possible interaction wilh genetic factors.

Keywords

Flúor, primeiro molar, genética

References



1. ABBUD, R.; MENDES, A. J. D. &ANDO, T. - Dimensões de primeiros molares permanentes de escolares de regiões com e sem flúor na água de abastecimento. Rev. Fac. Odontol., 17: 189-97, 1979.

2. ALVESALO, L. - The influence of sex-chromossome gene on tooth size in mano A genetic and quantitative study. Am. J. Orthod., 60: 420, 1971.

3. ALVESALO, L. & CHAPELLE, A. DE LA - Tooth size in two males with deletions of the long arm of the Y-chromossome.Ann. hum. Gene!., 45: 49-54,1981.

4. BAALACK, I. B. & FRISK, A. K. - Tand-och tanbagsbreddens beroend av f1uorhalt in dricksvatten. Svensk Tandlak. Tidskr., 62: 259-74,1969.

5. BAILlT, H. L. - Dental variation among populations: anth~opologic view. Dent. Clin. N. Am., 19: 125-39, 1975.

6. BAWDEN, J. W.; CRENSHAW, M. A.; TAKANO, Y. & HAMMARSTRÓM, L. - Enamel organ morphology, function, and transporto J. dento Res., 61: 1552-4, 1982.

7. COOPER, V. K. & LUDWIG, T. G. - Effect of fluoride and of soil trace elements on the morphology of the permanent molars in mano N.Z. dento J., 61: 33-40, 1965.

8. CURY, J. A. - Estudo do metabolismo do flúor em função de sua administração a ratas por pertodos pré-natais sucessivos. Piracicaba, Faculdade de Odontologia - UNICAMP, 1984. (Tese-Livre Docência).

9. DEPARTAMENTO AUTÔNOMO DE ÁGUA E ESGOTO, Araraquara - Relatórios das atividades. Araraquara, 1983-84.

10. EINSPAHR, H. M. & BUGG, C. E. - Esmalte, apatita e cárie: um enfoque cristalográfico. ln: MENAKER, L.Cáries dentárias: bases biológicas. Rio de Janeiro, Guanabara Koogan, 1984. p. 170-84.

11. ERICSSON, Y. - Fluoride excretion in human saliva and milk. Caries Res., 3: 156-66, 1969.

12. FEJERSKOV, O.; THYLSTRUP, A. & LARSEN, M. J. - Rational use of fluoride in caries prevention. A concept based on possible cariostatic mechanisms. Acta odontol. scand., 39: 241-9, 1981.

13. FLEMING, H. S. & GREENFIELD, V. S. - Changes on the teeth and jaws of neonatal webster mice after administration of NaF and CaF2 to the female parent during gestation. J. dento Res., 33: 180-8, 1954.

14. FREYMANN, L. - Étude de la fluorose experimentale chez le rat. Revue Odont-stomatol., 6: 213-20,1977.

15. GARN, S. M.; LEWIS, A. B. & KEREWSKY, R. S. - Sex difference in tooth size. J. dento Res., 43: 306, 1964.

16. GARN, S. M.; LEWIS, A. B. & KEREWSKY, R. S. - X-Iinked inheritance of tooth size. J. dento Res., 44: 439-41, 1965.

17. GARN, S. M.; LEWIS, A. B.; KEREWSKY, R. S. & JEGART, K. - Sex differences in intraindividual tooth size communalities. J. dento Res., 44: 476-9, 1965.

18. GARN, S. M.; LEWIS, A. B. & WALLENGA, A. - Evidence for a secular trend in tooth size over two generations. J. dento Res., 47: 503, 1968.

19. GARN, S. M.; OSBORNE, R. H. &McCABE, K. D. - The effect of prenatal factors on crown dimensions. Am. J. phys. Anthropol., 51: 665- 78, 1979.

20. GOOSE, D. H. &ROBERTS, E. E. - Possible influence of fluoridation on tooth crown size. J. dent Res., 58: 1562-3,1979.

21. GRAHNEN, H.; LYSELL, L.; MYBERG, N. & OLLlNEN, P. - Fluoride, mineralization defects ofthe enamel, and tooth width. Acta paediatr. scand., 63: 188-92, 1974.

22. GRAY, H. S. - A morphological study of the influence of fluoride on rat molar teeth. Arch. oral Biol., 18: 1451-60, 1973.

23. JENKINS, G. N.; VENKATESWARLU, P. & ZIPKIN, I. - Efectos fisiologicos de las pequenãs dosis de fluoruro. ln: ORGANIZAÇÃO MUNDIAL DA SAÚDE. - Fluoruros y salud. Ginebra, 1972. p. 205-19. (Serie de Monografias nº 59).

24. JOANNESSEN, L. B. - Variations in the morphology of mandibular first molars of albino rats. J. dent. Res., 40: 812-8, 1961.

25. KOLLAR, E. J. - Gene-enviroment interactions during tooth development Dent. Clin. North Am., 19: 141-50,1975.

26. KOULOURIDES, T. - Dinâmica de mineralização biol6gica aplicada a cárie. ln: MENAKER, L. - Cáries dentárias: bases biológicas. Rio de Janeiro, Guanabara Koogan, 1984. p. 368-89.

27. KRUGER, B. J. - The effect of "trace elements" on experimental dental caries in the albino rat I. A study of boron, copper, fluorine, manganese and molybdenum. Aust. dento J., 3: 236-47, 1958.

28. KRUGER, B. J. - Influence of boron, fluorine, and molybdenum on the morphology of the rat molar. J. dento Res., 41: 215,1962.

29. KRUGER, B. J. - Trace elements and dental morphology. Brisbane, University of Oueensland Press, 1962. (University of Oueensland Papers, 1,6). Apud: SIMPSON, W. J. & CASTALDI, C. R. - ref. 45.

30. KRUGER, B. J. - Pre-eruptive and post-eruptive effect of fluoride on rat molars. Aust. dento J., 9: 90-3, 1964.

31. LOVIUS, B. B. & GOOSE, D. H. - The effect of fluoridation of water on tooth morphology. Br. dent. J., 127: 322-4, 1969.

32. MOLLER, I. J. - Dental f1uorose og caries. Copenhagen, Rhodos, 1965. p. 239-55.

33. NIKIFORUK, G. - Understanding dental caries etiology and mechanisms: basic and clinical aspects. Basel, Karger, 1985. v.1., p. 83-107.

34. NIKIFORUK, G. - Understanding dental caries prevention: basic and clinical aspects. Basel, Karger, 1985. v.2, p. 45-62.

35. PAYNTER, K. J. & GRAINGER, R. M. - The relation of nutrition to the morphology and size of rat molar teeth. J. Cano Dent. Assoe., 22: 519-31, 1956.

36. PAYNTER, K. J. & GRAINGER, R. M. - Influence of nutrition and genetics on morphology and caries susceptibility. J. Am. Med. Assoe., 177: 306-9, 1961.

37. PAYNTER, K. J. & HUNT, A. M. - Morphogenesis of the rat first molar. Arch. oral Biol., 9: 611-26, 1964.

38. PAYNTER, K. J. & JOHNSTON, M. C. - Tooth formation, morphology, and eruption.ln: HARRIS, R. S. -Art and science of dental caries research. New York, Academic Press, 1968. p. 5-12.

39. SCHOUR, I. & MASSLER, M. - The teeth. ln: FARRIS, G.1. & GRIFFITH Jr., J. a., ed. - The rat in laboratory investigation. 2 ed. New York, Hafner, 1963. p. 104-65.

40. SHARMA, K.; CORRUCCINI, R. S. & HENDERSON, A. M. - Genetic variance in dental dimensions of Punjabi twins. J. dento Res., 64: 1389-91, 1985.

41. SIMPSON, W. J. & CASTALDI, C. R. - A study of crown morphology of newly-erupted first permanent molars in Wetaskiwin, Alberta (optimum fluoride) and Canrose, Alberta (Iow fluoride). Odont. Revy, 20: 1-14, 1969.

42. TOWNSEND, G. C. & BROWN, T. - Inheritance of tooth size in Australian aboriginals. Am. J. Phys. Anthrop., 48: 305-14, 1978.

43. UNIVERSITY OF TORONTO. DIVISION OF DENTAL RESEARCH - A study of the relation of fluoride morphology in humans. J. Ontario Dent. Assoe., 31: 268, 1954.

44. VONO, B. G. - Efeito do ítrio e do flúor na prevenção da cárie dentária em ratos. Bauru, Faculdade de Odontologia - USP, 1977. (Tese - Livre Docência).

45. WALLENIUS, B. - The mesiodistal width of the tooth in relation to the content of fluorine in drinking water. Odont. Revy, 10: 76-83, 1959.

46. WEATHERELL, J. A.; DEUTSCH, O.; ROBINSON, C. & HALLSWORTH, A. S. -Assimilation offluoride by enamel throughout the Iife of the tooth. Caries Res., 11 (suppl. 1): 85-115, 1977.

47. WEFEL, J. S. - Mechanisms of action of fluorides. ln: STEWART, R. E. et alii - Pediatric dentistry: scientific and clinical practice. St. Louis, Mosby, 1982. p. 772-9.

48. WHITFORD, G. M. - Fluorides: metacolism, mechanisms of action and safety. Dental Hyg., 57: 16-29, 1983.
588017447f8c9d0a098b4644 rou Articles
Links & Downloads

Rev. odontol. UNESP

Share this page
Page Sections