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Cell therapy stimulates bone neoformation in calvaria defects in rats subjected to local irradiation

Animal Models and Experimental Medicine 2019年第3期2卷 169-177页

作者： Ana Luisa Riul Sorio Paula Katherine Vargas‐Sanchez Roger Rodrigo Fernandes Dimitrius Leonardo Pitol Luiz Gustavo de Sousa Adriano Luiz Balthazar Bianchini Geraldo Batista de Melo sel.a siessere Karina Fittipaldi Bombonato‐Prado Department of Basic and Oral Biology School of Dentistry of Ribeirao PretoUniversity of Sao PauloRibeirao PretoSPBrazil Department of Radiotherapy Triangulo Mineiro Federal UniversityUberabaMinas GeraisBrazil Biomedical Sciences Institute Federal University of UberlandiaUberlandiaMinas GeraisBrazil

Background:The purpose of the study was to analyze the effect of cell therapy on the repair process in calvaria defects in rats subjected to ***:Bone marrow mesenchymal cells were characterized for osteoblastic *** of male Wistar rats were irradiated(20 Gy)and,after 4 weeks,osteoblastic cells were placed in surgically created defects in irradiated(IRC)and control animals(CC),paired with untreated irradiated(IR)and control(C)*** 30 days,histological and microtomographic evaluation was performed to establish significant(P<0.05)differences among the ***:Higher alkaline phosphatase detection and activity,along with an increase in mineralized nodules,in the IRC,C and CC groups compared to the IR group,confirmed an osteoblastic *** showed impaired bone neoformation following irradiation,affecting bone marrow *** therapy in the IRC group improved bone neoformation compared to the IR *** revealed increased bone volume,bone surface and trabecular number in IRC group compared to the IR ***:Cell therapy may improve bone neoformation in defects created after irradiation.

关键词： calvaria cell therapy irradiation osteoblasts rats

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Low-level laser therapy enhances the number of osteocytes in calvaria bone defects of ovariectomized rats

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Animal Models and Experimental Medicine 2019年第1期2卷 51-57页

作者： Priscilla Hakime Scalize Luiz Gustavo de Sousa Lígia Maria Napolitano Goncalves Dimitrius Leonardo Pitol Marcelo Palinkas Antonio Augusto Coppi Mariah Acioli Righeti Vitória Ricardo Karina Fittipaldi Bombonato-Prado Simone Cecílio Hallak Regalo sel.a siessere Department of Morphology Physiology and Basic PathologySchool of Dentistry of Ribeirao PretoUSP-University of Sao Paulo Faculty of Health and Medical Sciences School of Veterinary MedicineUniversity of Surrey

Background : Osteoporosis can make bone repair difficult. Low-level laser therapy( LLLT) has been shown to be a promising tool for bone neoformation. This study aimed to analyze the effect of LLLT on calvaria bone defects of ovariectomized rats using stereology. Methods : Fifty-four Wistar rats were subjected to bilateral ovariectomy, and bone defects were created in calvaria after 150 days. The animals were divided into nine groups(n = ?6 per group), and 24 hours after the bone defects were created they received three, six or 12 sessions of LLLT at 0, 20 or 30 J/cm 2, using a 780-nm low-intensity GaAlAs laser. One-way ANOVA followed by Tukey ' s post hoc test was used for data processing. A difference of P < 0.05 was considered statistically significant. The parameters evaluated were osteocyte density( Nv_(ost)), total osteocyte number( Nto ost), trabecular surface density( Sv_t), and trabecular surface area( Sa_t). Results : Data obtained showed that Nto ost, Sv t, and Sa t in group G2 rats were significantly different from G1(0 J/cm^2)( P < 0.05). Compared to group G4, G5 presented higher values for the parameters Sv t and Sa t, and G6 presented significantly higher values for almost all the analyzed parameters( Nv _(ost), Nto_(ost), Sv_t, and Sa t)( P < 0.05). Compared to group G7, G8 showed a higher value only for the parameter Sa t, and G9 showed significantly higher values for parameters Nv ost, Nto ost, Sv_t, and Sa_t. Conclusion : We conclude that LLLT stimulated bone neoformation and contributed to an increase in the total number of osteocytes, especially with a laser energy density of 30 J/cm^2 given for six and 12 sessions.

关键词： bone low-level laser therapy osteocytes osteoporosis

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Lower limb balance,ankle dorsiflexion,orofacial tissue pressure,and occlusal force of rugby players

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Sports Medicine and Health Science 2024年第2期6卷 173-178页

作者： Rafael R.Machado Marcelo Palinkas Paulo B.de Vasconcelos Sara Gollino Veridiana W.Arnoni Marcos Vinicios R.Prandi Isabela H.Regalo sel.a siessere Simone C.H.Regalo School of Dentistry of Ribeirao Preto University of Sao PauloBrazil National Institute for Translational Medicine(INCT-TM) Ribeirao PretoBrazil

This cross-sectional study examined the lower limb balance,ankle dorsiflexion,orofacial tissue pressure,and occlusal strength of rugby ***-six participants were divided into groups:rugby players(n=13)and healthy sedentary adults(n=13).Participants underwent an analysis of lower limb balance using a composite score(Y-Balance Test).Ankle dorsiflexion was measured using the Lunge *** Iowa Oral Performance Instrument was employed to measure orofacial tissue *** force was measured with a dynamometer,and T-Scan assessed occlusal contact *** were analyzed using the t-test(p<0.05)and ANCOVA with age and weight as covariates,where it is possible to verify that these factors did not influence the results *** differences were observed in the balance of the right(p=0.07)and left(p=0.02)lower limbs,where rugby players had lower composite *** were significant differences in the right(p=0.005)and left(p=0.004)lunges,with rugby players showing lower values,as well as lower tongue pressure(p=0.01)and higher lip pressure(p=0.03),with significant differences to sedentary *** was no significant difference in molar bite force and distribution occlusal contacts between *** seems to reduce lower limb displacement,cause ankle hypomobility,lead to changes in orofacial tissues,particularly the tongue and *** study is significant for identifying significant differences between rugby players and sedentary individuals,providing new insights into the impact of rugby on health and performance,which can benefit sports training and injury prevention.

关键词： Rugby Y-balance test Lunge test Orofacial tissues Occlusal force

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