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 3, 6 or 12 sessions of LLLT at 0, 20 or 30 J/cm, 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 < 0.05 was considered statistically significant. The parameters evaluated were osteocyte density ( ), total osteocyte number ( ), trabecular surface density ( ), and trabecular surface area ( ).
Results: Data obtained showed that , , and in group G2 rats were significantly different from G1 (0 J/cm) ( < 0.05). Compared to group G4, G5 presented higher values for the parameters and , and G6 presented significantly higher values for almost all the analyzed parameters ( , , , and ) ( < 0.05). Compared to group G7, G8 showed a higher value only for the parameter , and G9 showed significantly higher values for parameters , , , and .
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 given for 6 and 12 sessions.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431244 | PMC |
| http://dx.doi.org/10.1002/ame2.12056 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Different Internal Fixation Methods for Sanders Type II and III Calcaneal Fractures: A 5-Year Retrospective Study and Finite Element Analysis.
Orthop Surg
January 2025
Orthopedics Department, Gongli Hospital of Shanghai Pudong New Area, Shanghai, China.
Objective: Soft tissue defects and postoperative wound healing complications related to calcaneus fractures may result in significant morbidity. The aim of this study was to investigate whether percutaneous minimally invasive screw internal fixation (PMISIF) can change this situation in the treatment of calcaneal fractures, and aimed to explore the mechanical effects of different internal fixation methods on Sanders type III calcaneal fractures through finite element analysis.
Methods: This retrospective analysis focused on 83 patients with Sanders II and III calcaneal fractures from March 2017 to March 2022.
[Clinical characteristics and prognosis of acute erythroleukemia in children].
Zhongguo Dang Dai Er Ke Za Zhi
January 2025
Department of Children's Hematology and Oncology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
Objectives: To investigate the clinical characteristics and prognosis of acute erythroleukemia (AEL) in children.
Methods: A retrospective analysis was conducted on the clinical data, treatment, and prognosis of 8 children with AEL treated at the First Affiliated Hospital of Zhengzhou University from January 2013 to December 2023.
Results: Among the 7 patients with complete bone marrow morphological analysis, 4 exhibited trilineage dysplasia, with a 100% incidence of erythroid dysplasia (7/7), a 71% incidence of myeloid dysplasia (5/7), and a 57% incidence of megakaryocytic dysplasia (4/7).
Influences of multi-pass friction stir alloying on characterization of AZ91D alloy-based dual reinforcement bio-ceramic nano-composites.
J Appl Biomater Funct Mater
January 2025
MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Shandong University, Jinan, China.
In current study, microstructural, mechanical and corrosion behaviour were investigated with incorporation of dual reinforced AZ91D surface composites. This research was carried out for enhancement of the bio-degradability in biological environment. The surface composites were successfully fabricated by friction stir processing method with a rotation speed of 800 rpm, travel speed of 80 mm/min and 2.
View Article and Find Full Text PDFEvaluation of plasma cell sorting methods in multiple myeloma patients: flow cytometry versus magnetic beads.
Cancer Cell Int
January 2025
Department of Laboratory Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea.
Background: The prognosis of a plasma cell neoplasm (PCN) varies depending on the presence of genetic abnormalities. However, detecting sensitive genetic mutations poses challenges due to the heterogeneous nature of the cell population in bone marrow aspiration. The established gold standard for cell sorting is fluorescence-activated cell sorting (FACS), which is associated with lengthy processing times, substantial cell quantities, and expensive equipment.
View Article and Find Full Text PDFIntroduction: With the increased use of CTs in cases with trimalleolar ankle fractures, bone fragments between the posterior malleolus and the rest of the articular surface tibial plafond surface - described as intercalary fragments (ICFs) - can be recognized. The aim of this study was to determine the ICF size threshold for a significant change in the pressure distribution at the ankle joint, having a considerable impact on the remaining cartilage of the joint.
Design And Methods: Eight human cadaveric lower legs were used, and a posterior malleolus Bartonicek II fracture was created with sequential 2mm, 4mm, 6mm and 8mm ICFs.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!