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Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound

  • Authors:
    • Leyi Huang
    • Youzhi Cai
    • Honghua Hu
    • Peng Guo
    • Zengfeng Xin
  • View Affiliations / Copyright

    Affiliations: Department of Orthopedic Surgery, The Fourth Affiliated Hospital, Medical College of Zhejiang University, Yiwu, Zhejiang 322000, P.R. China, Department of Orthopedic Surgery, The First Affiliated Hospital, Medical College of Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China, Department of Orthopedic Surgery, The Eastern Hospital of The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China, Department of Orthopedic Surgery, The Second Affiliated Hospital, Medical College of Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
    Copyright: © Huang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 525-530
    |
    Published online on: June 8, 2017
       https://doi.org/10.3892/etm.2017.4565
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Abstract

Poly-L-lactic acid (PLLA) nanofibrous membranes are widely utilized for tissue regeneration. Low intensity pulsed ultrasound (LIPUS) has been considered as a feasible modality for bone union. The aim of the present study was to investigate the potential synergistic effect of LIPUS and PLLA electrospun nanofibrous membranes on large cortical bone defects in rabbits in vivo. The bilateral rabbit tibia defect model was constructed using 18 adult NZ rabbits and the defect sites were treated with the nanofibrous membranes combined with LIPUS or nanofibrous membranes alone. A total of 3 to 6 weeks after surgery, bone defect healing was evaluated radiologically and histologically. Radiographs demonstrated that nascent bone formation in the central part of the defect regions was only observed in the nanofibrous membrane plus LIPUS group, whereas the bone defects were not fully healed in the group treated with nanofibrous membrane alone. Histology analysis of the LIPUS‑treated group indicated that bone formation was thicker and more mature in the center of the defect site of the nanofibrous membrane plus LIPUS group. However, no differences were detected in the spatial and temporal pattern of the newly formed bone. Furthermore, the bone scores in the nanofibrous membrane plus LIPUS group were significantly greater than the scores exhibited in the nanofibrous membrane group at 3 and 6 weeks after surgery, respectively (P<0.01). In conclusion, the PLLA electrospun nanofibrous membrane combined with LIPUS indicated the capacity to improve the formation of nascent bone in rabbits with tibia defects. Further studies are required to fully elucidate the cell ingrowth depths inside nanofibrous membranes with scanning electron microscopy and the molecular effects of LIPUS on integrin and fibronectin.
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Copy and paste a formatted citation
Spandidos Publications style
Huang L, Cai Y, Hu H, Guo P and Xin Z: Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound. Exp Ther Med 14: 525-530, 2017.
APA
Huang, L., Cai, Y., Hu, H., Guo, P., & Xin, Z. (2017). Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound. Experimental and Therapeutic Medicine, 14, 525-530. https://doi.org/10.3892/etm.2017.4565
MLA
Huang, L., Cai, Y., Hu, H., Guo, P., Xin, Z."Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound". Experimental and Therapeutic Medicine 14.1 (2017): 525-530.
Chicago
Huang, L., Cai, Y., Hu, H., Guo, P., Xin, Z."Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound". Experimental and Therapeutic Medicine 14, no. 1 (2017): 525-530. https://doi.org/10.3892/etm.2017.4565
Copy and paste a formatted citation
x
Spandidos Publications style
Huang L, Cai Y, Hu H, Guo P and Xin Z: Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound. Exp Ther Med 14: 525-530, 2017.
APA
Huang, L., Cai, Y., Hu, H., Guo, P., & Xin, Z. (2017). Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound. Experimental and Therapeutic Medicine, 14, 525-530. https://doi.org/10.3892/etm.2017.4565
MLA
Huang, L., Cai, Y., Hu, H., Guo, P., Xin, Z."Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound". Experimental and Therapeutic Medicine 14.1 (2017): 525-530.
Chicago
Huang, L., Cai, Y., Hu, H., Guo, P., Xin, Z."Enhanced regeneration of large cortical bone defects with electrospun nanofibrous membranes and low‑intensity pulsed ultrasound". Experimental and Therapeutic Medicine 14, no. 1 (2017): 525-530. https://doi.org/10.3892/etm.2017.4565
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