Ultrastructure of Human Junctional Epithelial Cells Subjected to Different Magnitudes of intrusive orthodontic Forces
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2017, Vol 16, Issue 12
Abstract
Background: The present work aims to observe the structural characteristics and cellular features of Junctional Epithelium (JE) subjected to light and heavy intrusive orthodontic forces. Materials And Methods: Twenty vital maxillary first premolars from orthodontic extraction cases were allocated in three groups. Control group: premolars were not subjected to any force. Group I: light intrusive force was applied. Group II: heavy intrusive force was applied. Extraction was done after 7 and 14of force application. Transmission electron microscope (TEM)was used to examine JE cells. Results: Control, TEM revealed common cellular features regarding JE cells. Evidence of cellular alterations of JE could be detected in both experimental groups after 7 days as they expressed varies degrees of nuclear alterations, chromatin condensation, cytoplasmic organelles affection and loss of cellular junctions. Moreover, no serious deteriorations were reported in all groups such as, nuclear pleomorphism or apoptotic figures. Adaptative figures were recorded in all experimental groups with variable degrees. The basal junctional epithelial cells exhibited more enhancements in ultrastructural criteria than the superfacial cells. Conclusions: Human JE was a unique tissue. It is characterized by low cellular differentiation but quit adaptability even after exposure to different magnitudes of Intrusive orthodontic forces.
Authors and Affiliations
Heba A Adawy, Tarek H Marei
Keywords
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- EP ID EP251496
- DOI 10.9790/0853-1612103440
- Views 96
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