الفهرس 
Material and methodsOnly 14 pages are availabe for public view
 |  | from | 115 |  |  |
| | | from | 115 | | |
Abstract
SUMMARY AND CONCLUSION
SUMMARY AND CONCLUSION
A hundrad young albino rats were used in the present study.
They were divided into three groups. The first group included
fourty rats which were subdivided into two subgroups: subgroup
A, included twenty rats from birth to weaning; five animals were
killed at birth, the end of first, second and third weeks. Subgroup
B included twenty rats that were fed an ordinary pellets (cereal
grains) and four animals were killed at the end of fourth, fifth,
sixth, seventh and eighth weeks. The second group included
thirty rats which were fed a hard diet (which prepared in a
mincing machine and dried in a current of warm air). Six animals
were killed at the end fourth, fifth, sixth, seventh and eighth
weeks. The third group included thirty rats, that were fed a soft
diet (milk), six animals were killed at the end of fourth, fifth,
sixth, seventh and eighth weeks. The effect of these differences in
dietary consistency on the growth of the mandibular condyle
were examined histologically. Sections were stained with
hematoxylin and eosin stain for general structure of the tissue,
and with Masson’s trichrome stain for collagen fibres. The
sections were examined by the ordinary light microscope.
Generally, the soft diet rats had smaller condyles, with
decreased thickness of the condylar cartilage. The subchondral
bone trabeculae were decreased in size and number and separated
~91 ;v.
SUMMARY AND CONCLUSION
by large opened marrow spaces and the compact bones were
decreased in thickness as compared to those of the ordinary and
hard diet groups. In addition, the collagen synthesis was retarded
in the soft diet group.
Based on this study, it can be concluded that the growth of
the mandibular condyle in the rat is influenced by the consistency
of the diet. The soft diet diminishes the condylar growth as well
as collagen synthesis. However, the effect of diet consistency on
collagen synthesis and its distribution in different layers of .
condylar cartilage still unclear and need further investigation.