ISSN:
1600-0765
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
Cementogenesis of the molars with aging was studied using senescence accelerated mouse (SAM) which included SAMP2/Iw and SAMP8//Iw as prone strains, and SAMRl/Iw as a resistant strain. Morphometric analysis was done for the cementum thickness at 2, 6, 12 and 16 months of age on 4 parts of the mice, i.e. at the mesial (M), the distal (D), the apical (A) and the furcational (F) cementum of the maxillary first molar. SAMRl/Iw was also studied at 20 months of age. Mean cementum thickness was statistically analyzed for age and strain differences. Mean thicknesses of the M and the D cementum in SAMP2/Iw and in SAMP8//Iw were usually higher than those in SAMRl/Iw. Furthermore, there were significant differences between SAMP2/Iw and SAMRl/Iw, and between SAMP8//Iw and SAMRl/Iw, both at 12 and 16 months of age. There was no difference in mean thickness in the F cementum in either strain and at any age. In the A cementum, SAMP2/Iw displayed significantly thicker cementum than SAMRl/Iw at 6, 12 and 16 months of age. The degree of molar eruption was thought to be more accelerated in SAMP2/Iw than in SAMRl/Iw. However, the thickness of the A cementum was not different for SAMP8//Iw and SAMRl/Iw in any age group. In this study, 2 conclusions were drawn as follows: first, that SAMP2/Iw and SAMP8//Iw exhibited more accelerated cementogenesis than SAMRl/Iw in the M and the D cementum. Secondly, several factors such as intrinsic factors, occlusal forces and degree of attrition affected the cementogenesis of the M and the D, the F and the A cementum, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1600-0765.1996.tb01411.x
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