03046cam a2200349 a 4500 EG-GiCUC 20250223032053.0 181001s2018 ua dho f m 000 0 eng d EG-GiCUC eng EG-GiCUC eng Deposite Ph.D Cai01.24.03.Ph.D.2018.Ah.S Ahmed Elprince Mohamed Ragab Study of the effect of low level laser therapy on bone repair in rats / Ahmed Elprince Mohamed Ragab ; Supervised Yousry Mahmoud Mostafa , Nashwa Taher Abdelaziz , Ahmed Hassan Hussein دراسة تأثير الليزر المنخفض الشدة على إلتئام العظام فى الفئران Cairo : Ahmed Elprince Mohamed Ragab , 2018 101 P. : charts , facsimiles , photographs ; 25cm Thesis (Ph.D.) - Cairo University - National Institute of Laser Enhanced Science - Department of Laser Applications on in Medical and Biological Objective: This study was conducted to determine the effect of low level laser therapy (LLLT) on bone repair in rats. Materials and methods: Seventy two rats were assigned randomly into three groups, group (A) consisted of twenty four rats whose bone fracture didn{u2019}t receive laser therapy, group (B) consisted of twenty four rats whose bone fracture received He-Ne laser (632.8 nm) and group (C) consisted of twenty four rats whose bone fracture received Ga-As laser (905 nm). Each group was subdivided into three subgroups according to their sacrificing day on 15th, 30th and 45th post-operative days. Assessment of bone fracture healing was done through radiological analysis and histopathological analysis. Results: The results of this study revealed that group (C) showed more complete bone regeneration on 15th and 30th post-operative days when compared with groups (A&B) according to the radiological findings. According to the histopathological analysis, on 15th and 30th postoperative days, there was no statistically significant difference between groups (A&B) (p > 0.05) in newly formed blood vessels, fibroblasts, osteiod and bone formation scores. While, there was a significant difference between groups (A&C) and (B&C) (p value < 0.05) in favor of group (C). Conclusion: Ga-As laser showed a bio-stimulating effect on the rate of bone repair by stimulating the modulation of the initial inflammatory response and anticipating the resolution to normal condition at the earlier periods. Both He-Ne and Ga-As lasers were not different from the control group on 45th postoperative day Issued also as CD Bone repair Low level laser therapy Low level laser therapy (LLLT) Ahmed Hassan Hussein , Supervisor Nashwa Taher Abdelaziz , Supervisor Yousry Mahmoud Mostafa , Supervisor http://172.23.153.220/th.pdf Nazla Revisor Shimaa Cataloger ddc TH 67762 67762 ddc 0 CUCL cl210 2024-02-11 Cai01.24.03.Ph.D.2018.Ah.S 01010110075981000 2023-09-22 00:00:00 TH ddc 0 CUCL cl2u8 2024-02-11 Cai01.24.03.Ph.D.2018.Ah.S 01020110075981000 2023-09-22 00:00:00 75981.CD CD