Caracterización de incisivos bovinos permanentes

Abstract

ABSTRACT: The objective of this work was to characterize central permanent incisors from two groups of cattle defined according to breed and environment. Eight teeth from Patagonian native cattle raised in the province of Buenos Aires (GCP) and seven from indicus cross (GCI) native of the province of Santa Fe were used, on which measurement variables were: dentin hardness (DH) on three depths (D1), (D2) and (D3), average hardness of enamel (AEH), average dentin hardness (ADH), tooth width  (TW), central enamel thickness (CET) and enamel roughness (ER). To evaluate DH ANOVA and random regression were used through mixed models. Linear correlation analysis, principal components analysis and the classification trees technique were used for the study of associations and groupings among variables. DH increased with depth and was higher in GCP. Differences between groups were not found on CET and TW. ER resulted to be lower in GCP, where it was associated in a positive way with CET and MDH, unlike GCI in which negative correlations of MDH were found with CET and ADH. ER was the variable with higher discrimination power between groups. DD  increases with depth. GCP proved to have higher DH and lower ER. Groups manifested different associations among variables and ER was the one that best discriminated them. This raises the need to advance the study of genetic determinism of evaluated characteristics.

Keywords:

dentina

dientes

dureza

esmalte

dentin

teeth

hardness

enamel

References

Balzarini, M.G; González, L.; Tablada, M.; et al. INFOSTAT: Manual del Usuario. Córdoba, Argentina: Editorial Brujas, 2008.

Bavera, G.A. Cronometría dentaria. Cursos de Producción Bovina de Carne FAV UNRC, 2008. Disponible en:
http: //www.produccionanimal.com.ar/ información_tecnica/ dentición_y_protesis Accesado en 30/10/2011.

Castanho, G.M.; Marques-Martins, M.; BarbosaMarques, J.; et al. Micromorphological and hardness analyses of human and bovine sclerotic dentin: a comparative study. Braz Oral Res, v.25, n.3, p.274-9, 2011.

Fernández, E.N.; Abbiati, N.N.; Cabrera, J.; Martínez, R.D. Microdureza del esmalte dental en incisivos centrales permanentes de dos genotipos bovinos. Rev. MVZ Córdoba, v.16, n.1, p. 2310-2316, 2011.

Fuentes-Fuentes, Ma .V. Propiedades mecánicas de la dentina humana. Avances en Odontoestomatología, v.20, N.2, p. 79-83, 2004.

Getty, R.; Grossman, J.D.; Sisson, S. Anatomía de los animales domésticos. Tomo I. 5ª edición. Barcelona, España: Ediciones Masson, 2001. 1416p.

Gómez de Ferraris, M.E.; Campos-Muñoz, A. Histología, Embriología e Ingeniería Tisular Bucodental. 3ª edición. Madrid: Editorial Médica Panamericana, 2009. 454p.

Hinojosa-Rivera, M.; Reyes-Melo M.E. La rugosidad de las superficies: topometría. Revista Ingenierías, v.IV, n.11, p.27-33, 2001.

Martínez, R.D.; Fernández, E.N.; Abbiati, N.N. Factores que influyen en el desgaste dental de los bovinos. Actualización. Revista Veterinaria Argentina, v.XXVIII, n.277, 2011. Disponible en: http://www.veterinariargentina.com/ revista/2011/05/factores-que-influyen-en-eldesgaste-dental-de-los-bovinos-actualizacion Accesado en: 11/11/2011.

Mas-López, A.C. Efecto erosivo valorado a través de la microdureza superficial del esmalte dentario producido por tres bebidas industrializadas de alto consumo en la ciudad de Lima. Estudio in Vitro. Perú: Universidad Nacional Mayor de San Marcos, 2002. 137p. Tesis (Doctorado en Odontología).

Pashley, D.H.; Okabe, A.; Parham, P. The relationship between dentin microhardness and tubule density. Endod. Dent. Traumatol., v.1, n.5, p.176-9, 1985.

Peña, D. Análisis de datos multivariantes. 1ra Edición. Madrid: Editorial McGraw-Hill, 2002. 539p.

Puentes, H.G.; Rincón, L.P. Caracterización química y mecánica parcial de dientes incisivos de bovino como posible modelo de estudio de materiales dentales. Rev. Fed. Odont. Colombiana, n.20, p.9-19, 2004.

Sabatoski, M.A; Maruo, I.T.; Camargo, E.S.; et al. Influence of natural bovine enamel roughness on bond strength after etching. The Angle Orthodontist, v.80, n.3, p.562-9, 2010.

SAS Institute Inc. SAS OnlineDoc® 9.2. Cary. NC: SAS Institute Inc., 2009.

Tulloh, N.M. A study of the incisor teeth of beef cattle. Australian Journal of Agricultural Research, v.13, n.2, p.350-361, 1962.