scholarly journals Infection and tissue engineering in segmental bone defects—a mini review

2011 ◽  
Vol 22 (5) ◽  
pp. 721-725 ◽  
Author(s):  
Manitha B Nair ◽  
James D Kretlow ◽  
Antonios G Mikos ◽  
F Kurtis Kasper
Keyword(s):  
Tissue Engineering ◽  
Bone Defects ◽  
Segmental Bone ◽  
Segmental Bone Defects

scholarly journals Surface mineralized biphasic calcium phosphate ceramics loaded with urine-derived stem cells are effective in bone regeneration

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Fei Xing ◽  
Lang Li ◽  
Jiachen Sun ◽  
Guoming Liu ◽  
Xin Duan ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Stem Cells ◽  
Calcium Phosphate ◽  
Bone Tissue ◽  
Biphasic Calcium Phosphate ◽  
Bone Defects ◽  
Biological Characteristics ◽  
Segmental Bone ◽  
Segmental Bone Defects

Abstract Background Segmental bone defects caused by trauma, tumors, or infection are a serious challenge for orthopedists in the world. Recent developments in tissue engineering have provided a new treatment for segmental bone defects. Urine-derived stem cells (USCs) can be obtained noninvasively and might be a new kind of seed cells used in bone tissue regeneration. Therefore, the first aim of the present study was to investigate the biological characteristics of USCs. The second aim of the present study was to study the osteogenic effect of surface mineralized biphasic calcium phosphate ceramics (BCPs) loaded with USCs in vitro and in vivo. Methods We isolated USCs from the urine of healthy adult donors and evaluated the biological characteristics of USCs in vitro. We mineralized the surface of BCPs by simulated body fluid (SBF). Cell adhesion and proliferation of USCs on the surface mineralized BCPs were evaluated. Osteogenic proteins and genes of USCs on the surface mineralized BCPs were texted by enzyme-linked immunosorbent assay (ELISA) and real-time polymerase chain reaction (RT-PCR) assay. Critical-sized segmental bone defects model in New Zealand white rabbits were established and randomly divided into 4 groups (surface mineralized BCPs loaded with USCs, BCPs loaded with USCs, surface mineralized BCPs, and BCPs) based on the implant they received. The therapeutic efficacy of the scaffolds in a large bone defect at post-implantation was evaluated by imaging and histological examination. Results USCs isolated in our study expressed stem cell-specific phenotypes and had a stable proliferative capacity and multipotential differentiation capability. Surface mineralized BCPs promoted osteogenic proteins and genes expression of USCs without affecting the proliferation of USCs. After 10 weeks, the amount of new bone formation was the highest in the group of surface mineralized BCPs loaded with USCs. Conclusion USCs, from non-invasive sources, have good application prospects in the field of bone tissue engineering. Surface mineralized BCPs can significantly enhance osteogenic potential of USCs without changing biological characteristics of BCPs. Surface mineralized BCPs loaded with USCs are effective in repairing of critical-sized segmental bone defects in rabbits.

The Treatment Efficacy of Bone Tissue Engineering Strategy for Repairing Segmental Bone Defects Under Osteoporotic Conditions

2015 ◽  
Vol 21 (17-18) ◽  
pp. 2346-2355 ◽  
Author(s):  
Zhen Xing Wang ◽  
Cheng Chen ◽  
Quan Zhou ◽  
Xian Song Wang ◽  
Guangdong Zhou ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Treatment Efficacy ◽  
Bone Defects ◽  
Engineering Strategy ◽  
Segmental Bone ◽  
Segmental Bone Defects

Characterization of Tissue-Engineered Human Periosteum and Allograft Bone Constructs: The Potential of Periosteum in Bone Regenerative Medicine

2020 ◽  
Vol 209 (2–3) ◽  
pp. 128-143
Author(s):  
Qing Yu ◽  
Robin DiFeo Jacquet ◽  
William J. Landis
Keyword(s):  
Gene Expression ◽  
Tissue Engineering ◽  
Regenerative Medicine ◽  
Bone Formation ◽  
Bone Defects ◽  
Delayed Union ◽  
Non Union ◽  
Segmental Bone ◽  
First Time ◽  
Segmental Bone Defects

Delayed-union or non-union between a host bone and a graft is problematic in clinical treatment of segmental bone defects in orthopedic cases. Based on a preliminary study of human periosteum allografts from this laboratory, the present work has extensively investigated the use of human cadaveric tissue-engineered periosteum-allograft constructs as an approach to healing such serious orthopedic surgical situations. In this current report, human cadaveric periosteum-wrapped bone allografts and counterpart controls without periosteum were implanted subcutaneously in athymic mice (<i>nu/nu</i>) for 10, 20, and, for the first time, 40 weeks. Specimens were then harvested and assessed by histological and gene expression analyses. Compared to controls, the presence of new bone formation and resorption in periosteum-allograft constructs was indicated in both histology and gene expression results over 40 weeks of implantation. Of several genes also examined for the first time, <i>RANKL</i> and <i>SOST</i> expression levels increased in a statistically significant manner, data suggesting that bone formation and the presence of increasing numbers of osteocytes in bone matrices had increased with time. The tissue-engineering strategy described in this study provides a possible means of improving delayed-union or non-union at the healing sites of segmental bone defects or bone fractures. The potential of periosteum and its resident cells could thereby be utilized effectively in tissue-engineering methods and tissue regenerative medicine.

scholarly journals Robotic in situ 3D bio-printing technology for repairing large segmental bone defects

2020 ◽  
Author(s):  
Lan Li ◽  
Jianping Shi ◽  
Kaiwei Ma ◽  
Jing Jin ◽  
Peng Wang ◽  
...  
Keyword(s):  
Bone Defects ◽  
Printing Technology ◽  
Segmental Bone ◽  
Segmental Bone Defects

Experimental study on repair of large segmental bone defects of goat femur by nano calcium-deficient hydroxyapatite-multi (amino acid) copolymer membrane tubes

2021 ◽  
pp. 088532822110002
Author(s):  
Yan Xiong ◽  
Hong Duan ◽  
Bin Zhang ◽  
Cheng Ren ◽  
Zeping Yu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Bone Defects ◽  
Torsional Stiffness ◽  
Control Group ◽  
Allogenic Bone ◽  
Acid Copolymer ◽  
Membrane Tube ◽  
Segmental Bone ◽  
Experimental Group ◽  
Segmental Bone Defects

Objective The purpose of this study was to observe feasibility of nano calcium-deficient hydroxyapatite-multi (amino acid) copolymer (n-CDHA-MAC) membrane tubes in repairing goat femurs’ large defects. Methods Twelve goats were divided into two groups, whose femurs were created 30 mm segmental bone defects and then implants were performed. In experimental group, the bone defect of right femur was reconstructed by n-CDHA-MAC membrane tube, while left side was reconstructed by allogenic bone tube in control group. Every three goats were sacrificed at 4, 8, 16, 24 weeks after operation respectively. General observation, X-ray analysis, histology, Scanning electron microscope (SEM) examination and protein level comparison of BMP-2 were conducted to evaluate the effects of repairing segmental bone defects. Results All goats recovered well from anesthesia and surgical interventions. The radiographic evaluations showed that periosteal reaction outside of the membrane tubes and allogenic bone tubes were observed 4 weeks after surgery. At 16 weeks, callus was continuously increased in experimental group, which was more obvious than control group. At 24 weeks, callus outside of the membrane tubes connected together. Histologic evaluation showed fibro-cartilage callus was evolved into bony callus in experimental group, which was more obvious than control group at 8 and 16 weeks. The protein expression level of BMP-2 increased at 4, 8 weeks and peaked at 16 weeks in experimental groups. There were statistical differences at 8 and 16 weeks ( P < 0.05). At each time point in 8, 16, 24 weeks after surgery, the bending stiffness, torsional stiffness and compressive strength of the two groups were similar, and there was no significant difference ( P > 0.05). Conclusions This novel surface degradation n-CDHA-MAC membrane tube has good ability to maintain enough membrane space, which can provide long-term and stable biomechanical support for large bone defects and integrate well with the surrounding bone.

scholarly journals Regenerating Critical Size Rat Segmental Bone Defects with a Self‐Healing Hybrid Nanocomposite Hydrogel: Effect of Bone Condition and BMP‐2 Incorporation

2021 ◽  
pp. 2100088
Author(s):  
Claire I. A. Houdt ◽  
Marianne K. E. Koolen ◽  
Paula M. Lopez‐Perez ◽  
Dietmar J. O. Ulrich ◽  
John A. Jansen ◽  
...  
Keyword(s):  
Critical Size ◽  
Bone Defects ◽  
Self Healing ◽  
Nanocomposite Hydrogel ◽  
Hybrid Nanocomposite ◽  
Segmental Bone ◽  
Bone Condition ◽  
Segmental Bone Defects
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