• 1. Department of Orthopaedics, Huaihe Hospital, Henan University, Kaifeng Henan, 475000, P. R. China;
  • 2. Henan University of Science and Technology, Luoyang Henan, 471000, P. R. China;
  • 3. Nanoengineering Technology Center of Henan University, Kaifeng Henan, 475004, P. R. China;
MA Jingyi, Email: mjy@henu.edu.cn
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Objective The antifriction and antiwear effects of gelatin nanoparticles (GLN-NP) on artificial joint materials in bionic joint lubricant were investigated to provide a theoretical basis for the development of new bionic joint lubricant. Methods GLN-NP was prepared by cross-linking collagen acid (type A) gelatin with glutaraldehyde by acetone method, and the particle size and stability of GLN-NP were characterized. The biomimetic joint lubricants with different concentrations were prepared by mixing 5, 15, and 30 mg/mL GLN-NP with 15 and 30 mg/mL hyaluronic acid (HA), respectively. The friction reduction and antiwear effects of the biomimetic joint lubricants on zirconia ceramics were investigated on a tribometer. The cytotoxicity of each component of bionic joint lubricant on RAW264.7 mouse macrophages was evaluated by MTT assay. Results The particle size of GLN-NP was about 139 nm, and the particle size distribution index was 0.17, showing a single peak, indicating that the particle size of GLN-NP was uniform. In complete culture medium, pH7.4 PBS, and deionized water at simulated body temperature, the particle size of GLN-NP did not change more than 10 nm with time, indicating that GLN-NP had good dispersion stability and did not aggregate. Compared with 15 mg/mL HA, 30 mg/mL HA, and normal saline, the friction coefficient, wear scar depth, width, and wear volume were significantly reduced by adding different concentrations of GLN-NP (P<0.05); there was no significant difference between different concentrations of GLN-NP (P>0.05). Biocompatibility test showed that the cell survival rate of GLN-NP, HA, and HA+GLN-NP solution decreased slightly with the increase of concentration, but the cell survival rate was more than 90%, and there was no significant difference between groups (P>0.05). Conclusion The bionic joint fluid containing GLN-NP has good antifriction and antiwear effect. Among them, GLN-NP saline solution without HA has the best antifriction and antiwear effect.

Citation: LI Weihua, LIANG Fengguang, DONG Shiyu, LÜ Weizhen, LIU Yantao, WANG Xiao, MA Jingyi. Antifriction and anti-wear performances of bionic lubricating fluid containing gelatin nanoparticles for artificial joint materials. Chinese Journal of Reparative and Reconstructive Surgery, 2023, 37(2): 196-201. doi: 10.7507/1002-1892.202209035 Copy

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