Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral Biology

The present study was conducted to compare between the amount of produced damage from diode laser incisions with different wavelengths and/or powers on the collateral tissue in the buccal mucosa of white rabbits. Fourty five adult rabbits (each 2000 grams wt.) were utilized for the study and were equally sorted into 9 groups.Group I (control group with no intervention) represented the normal healthy rabbits. Then 1 cm incision was performed in the buccal mucosa of rabbits using diode laser in all experimental groups as follows: Group II: 980 nm with power1.5 watts, Group III: 980 nm with power 2.5 watts, Group IV: 810 nm with power 1.5 watts, Group V: 810 nm with power 2.5 watts, Group VI: 980 nm with power 1.5 watts, Group VII: 980 nm with power 2.5 watts, Group VIII: 810 nm with power 1.5 watts, Group IX: 810 nm with power 2.5 watts. Histological assessment of the buccal mucosa specimens in vicinity of the incisions was performed immediately and after 3days post incision. The histological results included carbonization,cytoplasmic vacuolization, inflammatory cell infiltration and collagen hyalinization in epithelium and lamina propria. Conclusion: Marked histopathological changes were observed among both wavelengths upon application of different powers. 810 nm wavelength produced lesser inflammatory changes when compared to 980 that were only significant with powers; 1.5 watts at day zero and 2.5 watts at day 3

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