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International journal of odontostomatology

versión On-line ISSN 0718-381X

Resumen

ORTIZ SALAZAR, Mario Alejandro  y  SALAZAR MONSALVE, Liliana. Histological Features of Dental Pulp in 4 and 12 Week-old Mice. Int. J. Odontostomat. [online]. 2014, vol.8, n.2, pp.159-164. ISSN 0718-381X.  http://dx.doi.org/10.4067/S0718-381X2014000200002.

Under physiological conditions, the dentinopulpar complex is not associated with remodeling and resorption. Histological findings show that the pulp as a connective tissue, has special features that bear on its ability to adapt. The purpose of this study was to evaluate the histological features of the dental pulp of mice of albino Swiss strain of 4 and 12 weeks-old. Eight hemimandibles of Swiss albino mice of 4 and 12 weeks-old were used. Hemimandibles were fixed in 4% paraformaldehyde, decalcified with EDTA 5% for 10 days at 4°C and included in Paraplast®; 5 mm sections were obtained and stained with H&E, Masson's trichromic and silver impregnation. The histological characteristics of the pulp revealed two main areas in both age groups: the peripheral zone of the pulp formed by a set of cells compatible with odontoblastos and a poor-cell zone, and a central zone rich in pulp fibroblasts and blood vessels. Differences between age groups were seen in the expression of fibrillar collagen matrix. We found similarities in the presence of reticular fibers between the groups. The pulp of Swiss albino mice showed a division into two well-defined zones: central and peripheral. The greatest difference by age was in the amount of collagen.

Palabras clave : dental pulp; odontoblasts; collagen.

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