The critical size bony defect in a small animal for bone healing studies (I): Comparative anatomical study on rats' femur / Der kritische Knochendefekt am Kleintier zur Untersuchung der Knochenheilung: Vergleichende Anatomie am Rattenfemur

2005 ◽  
Vol 50 (4) ◽  
pp. 107-110 ◽  
Author(s):  
M Jäger ◽  
M Sager ◽  
S Lensing-Höhn ◽  
R Krauspe
Keyword(s):  
Bone Healing ◽  
Critical Size ◽  
Small Animal ◽  
Anatomical Study ◽  
Bony Defect ◽  
Vergleichende Anatomie

scholarly journals 3D-Bioprinting Strategies Based on In Situ Bone-Healing Mechanism for Vascularized Bone Tissue Engineering

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 287
Author(s):  
Ye Lin Park ◽  
Kiwon Park ◽  
Jae Min Cha
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Bone Healing ◽  
Critical Size ◽  
Current Knowledge ◽  
3D Bioprinting ◽  
The Past ◽  
Regeneration Processes

Over the past decades, a number of bone tissue engineering (BTE) approaches have been developed to address substantial challenges in the management of critical size bone defects. Although the majority of BTE strategies developed in the laboratory have been limited due to lack of clinical relevance in translation, primary prerequisites for the construction of vascularized functional bone grafts have gained confidence owing to the accumulated knowledge of the osteogenic, osteoinductive, and osteoconductive properties of mesenchymal stem cells and bone-relevant biomaterials that reflect bone-healing mechanisms. In this review, we summarize the current knowledge of bone-healing mechanisms focusing on the details that should be embodied in the development of vascularized BTE, and discuss promising strategies based on 3D-bioprinting technologies that efficiently coalesce the abovementioned main features in bone-healing systems, which comprehensively interact during the bone regeneration processes.

scholarly journals Leucocyte- and Platelet-Rich Fibrin Block: Its Use for the Treatment of a Large Cyst with Implant-Based Rehabilitation

Medicina ◽  
2021 ◽  
Vol 57 (2) ◽  
pp. 180 ◽  
Author(s):  
Rodolfo Mauceri ◽  
Denise Murgia ◽  
Orazio Cicero ◽  
Luigi Paternò ◽  
Luca Fiorillo ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Bone Defect ◽  
Bone Healing ◽  
Bone Substitute ◽  
Alveolar Bone ◽  
Critical Size ◽  
Large Bone ◽  
Alveolar Bone Defect ◽  
Positive Results ◽  
Autologous Platelet

The management of critical-size bone defects is still demanding. Recently, autologous platelet concentrates in combination with bone substitute have been applied and reported in a few studies. Our aim is to report the healing of a critical-size alveolar bone defect treated with a new bone regeneration technique by means of L-PRF and L-PRF blocks. A 45-year-old woman presented a large cystic lesion; the extraction of three teeth, a cyst removal procedure, and bone regeneration procedures with L-PRF and L-PRF blocks were planned. The L-PRF block was prepared by mixing a bone substitute with a piece of L-PRF membrane and liquid fibrinogen. Additionally, after bone healing an implant-based rehabilitation was optimally performed. On the basis of the positive results, in terms of bone healing and tissue regeneration in a large bone defect, the application of L-PRF and L-PRF blocks, in agreement with the scarce literature, is suggested as a feasible procedure in selected cases.

scholarly journals Improved healing of critical-size femoral defect in osteoporosis rat models using 3D elastin/polycaprolactone/nHA scaffold in combination with mesenchymal stem cells

2021 ◽  
Vol 32 (3) ◽  
Author(s):  
Fatemeh Hejazi ◽  
Vahid Ebrahimi ◽  
Mehrdad Asgary ◽  
Abbas Piryaei ◽  
Mohammad Javad Fridoni ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Bone Healing ◽  
Critical Size ◽  
Therapeutic Potential ◽  
Rna Extraction ◽  
Osteotomy Site ◽  
Cell Groups ◽  
The Right

AbstractOsteoporosis is a common bone disease that results in elevated risk of fracture, and delayed bone healing and impaired bone regeneration are implicated by this disease. In this study, Elastin/Polycaprolactone/nHA nanofibrous scaffold in combination with mesenchymal stem cells were used to regenerate bone defects. Cytotoxicity, cytocompatibility and cellular morphology were evaluated in vitro and observations revealed that an appropriate environment for cellular attachment, growth, migration, and proliferation is provided by this scaffold. At 3 months following ovariectomy (OVX), the rats were used as animal models with an induced critical size defect in the femur to evaluate the therapeutic potential of osteogenic differentiation of bone marrow mesenchymal stem cells (BM-MSCs) seeded on 3 dimension (3D) scaffolds. In this experimental study, 24 female Wistar rats were equally divided into three groups: Control, scaffold (non-seeded BM-MSC), and scaffold + cell (seeded BM-MSC) groups. 30 days after surgery, the right femur was removed, and underwent a stereological analysis and RNA extraction in order to examine the expression of Bmp-2 and Vegf genes. The results showed a significant increase in stereological parameters and expression of Bmp-2 and Vegf in scaffold and scaffold + cell groups compared to the control rats. The present study suggests that the use of the 3D Elastin/Polycaprolactone (PCL)/Nano hydroxyapatite (nHA) scaffold in combination with MSCs may improve the fracture regeneration and accelerates bone healing at the osteotomy site in rats.

Influence of the proportion of particulate autogenous bone graft/platelet-rich plasma on bone healing in critical-size defects

Bone ◽  
2009 ◽  
Vol 45 (2) ◽  
pp. 339-345 ◽  
Author(s):  
Maria Nagata ◽  
Michel Messora ◽  
Roberta Okamoto ◽  
Natália Campos ◽  
Natália Pola ◽  
...  
Keyword(s):  
Bone Graft ◽  
Bone Healing ◽  
Critical Size ◽  
Platelet Rich Plasma ◽  
Autogenous Bone Graft ◽  
Autogenous Bone ◽  
Critical Size Defects

Retracted: Influence of Biphasic β-TCP with and without the use of collagen membranes on bone healing of surgically critical size defects. A radiological, histological, and histomorphometric study

2013 ◽  
Vol 25 (11) ◽  
pp. 1228-1238 ◽  
Author(s):  
Jose L. Calvo-Guirado ◽  
Maria P. Ramírez-Fernández ◽  
Rafael A. Delgado-Ruíz ◽  
Jose E. Maté-Sánchez ◽  
Pablo Velasquez ◽  
...  
Keyword(s):  
Bone Healing ◽  
Critical Size ◽  
Histomorphometric Study ◽  
Critical Size Defects ◽  
Collagen Membranes

scholarly journals First Human Leucocyte Antigen (HLA) Response and Safety Evaluation of Fibrous Demineralized Bone Matrix in a Critical Size Femoral Defect Model of the Sprague-Dawley Rat

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3120
Author(s):  
Nicolas Söhling ◽  
Maximilian Leiblein ◽  
Alexander Schaible ◽  
Maren Janko ◽  
Joachim Schwäble ◽  
...  
Keyword(s):  
Bone Healing ◽  
Critical Size ◽  
Demineralized Bone Matrix ◽  
High Surface ◽  
Bone Matrix ◽  
Volume Ratio ◽  
Bone Allograft ◽  
Control Group ◽  
Sprague Dawley ◽  
Demineralized Bone

Treatment of large bone defects is one of the great challenges in contemporary orthopedic and traumatic surgery. Grafts are necessary to support bone healing. A well-established allograft is demineralized bone matrix (DBM) prepared from donated human bone tissue. In this study, a fibrous demineralized bone matrix (f-DBM) with a high surface-to-volume ratio has been analyzed for toxicity and immunogenicity. f-DBM was transplanted to a 5-mm, plate-stabilized, femoral critical-size-bone-defect in Sprague-Dawley (SD)-rats. Healthy animals were used as controls. After two months histology, hematological analyses, immunogenicity as well as serum biochemistry were performed. Evaluation of free radical release and hematological and biochemical analyses showed no significant differences between the control group and recipients of f-DBM. Histologically, there was no evidence of damage to liver and kidney and good bone healing was observed in the f-DBM group. Reactivity against human HLA class I and class II antigens was detected with mostly low fluorescence values both in the serum of untreated and treated animals, reflecting rather a background reaction. Taken together, these results provide evidence for no systemic toxicity and the first proof of no basic immunogenic reaction to bone allograft and no sensitization of the recipient.

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