• 1. Department of Trauma Orthopedics, Binzhou Medical University Hospital, Binzhou Shandong, 256603, P.R.China;
  • 2. Department of Spine and Joint, the People’s Hospital of Wushan County, Wushan Chongqing, 100191, P.R.China;
  • 3. Department of Orthopedic Surgery, the University of Kansas School of Medicine-Wichita, Kansas, 67260, USA;
YANG Shangyou, Email: shang-you.yang@wichita.edu; YANG Shuye, Email: tiger19810909@sina.com
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Objective To explore the feasibility of establishment of a artificial joint aseptic loosening mouse model by cobalt-chromium particles stimulation.Methods Twenty-four 8-week-old male severe combined immunodeficient (SCID) mice were divided into experimental group (n=12) and control group (n=12). The titanium nail was inserted into the tibial medullary cavity of mouse in the two groups to simulate artificial joint prosthesis replacement. And the cobalt-chromium particles were injected into the tibial medullary cavity of mouse in experimental group. The survival of the mouse was observed after operation; the position of the titanium nail and the bone mineral density of proximal femur were observed by X-ray film, CT, and Micro-CT bone scanning; and the degree of dissolution of the bone tissue around the tibia was detected by biomechanical test and histological staining.Results Two mice in experimental group died, and the rest of the mice survived until the experiment was completed. Postoperative imaging examination showed that there was no obvious displacement of titanium nails in control group, and there were new callus around the titanium nails. In experimental group, there was obvious osteolysis around the titanium nails. The bone mineral density of the proximal tibia was 91.25%±0.67%, and the maximum shear force at the tibial nail-bone interface was (5.93±0.85) N in experimental group, which were significantly lower than those in control group [102.07%±1.87% and (16.76±3.09) N] (t=5.462, P=0.041; t=3.760, P=0.046). Histological observation showed that a large number of inflammatory cells could be seen around the titanium nails in experimental group, while there was no inflammatory cells, and obvious bone tissue formation was observed in control group.Conclusion The artificial joint aseptic loosening mouse model can be successfully established by cobalt-chromium particles stimulation.

Citation: JIANG Shengyuan, LI Dan, JIANG Jianhao, YANG Shangyou, YANG Shuye. Establishment of artificial joint aseptic loosening mouse model by cobalt-chromium particles stimulation. Chinese Journal of Reparative and Reconstructive Surgery, 2020, 34(5): 615-620. doi: 10.7507/1002-1892.201909023 Copy

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