Effects of repeated + Gz forces on masticatory muscles / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 327-329, 2002.
Article
in English
| WPRIM
| ID: wpr-347385
ABSTRACT
<p><b>OBJECTIVE</b>To study the effects of repeated + Gz forces on masticatory muscles.</p><p><b>METHODS</b>48 male Wistar rats were randomly divided into 4 groups. Group A was normally fed. Group B was only fixed with rat-kept devices for 5 minutes. Group C was borne + 1 Gz for 5 minutes. Group D was repeatedly exposed + 10 Gz (each for 30 s, onset rate about 0.5 G/s, 5 times/d with + 1 Gz 1 minute intervals, 4 d/wk, 3 weeks in total). The histological changes of the masseter, temporal and lateral pterygoid muscles were observed.</p><p><b>RESULTS</b>No abnormal changes were observed in Group A, B and C. But pathological changes could be found in group D. The wrench and deformation of muscular fibers, the dissolution of partial myofibril, the swelling of mitochondria, the reduce of hepatin from the masseter and lateral pterygoid muscles could be found.</p><p><b>CONCLUSIONS</b>Repeated + Gz stresses could induce the damage of masticatory muscles in different degrees.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Pterygoid Muscles
/
Temporal Muscle
/
Time Factors
/
Microscopy, Electron
/
Rats, Wistar
/
Hypergravity
/
Masseter Muscle
/
Masticatory Muscles
Limits:
Animals
Language:
English
Journal:
Chinese Journal of Stomatology
Year:
2002
Type:
Article
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