Journal of Shandong University (Health Sciences) ›› 2025, Vol. 63 ›› Issue (7): 62-67.doi: 10.6040/j.issn.1671-7554.0.2025.0161

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Mid-term efficacy of double-column mobile bearing unicompartmental knee prosthesis in treating anterior-medial knee osteoarthritis

MIAO Zhuang1, LIU Peilai2   

  1. 1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
    2. Department of Orthopedics, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
  • Published:2025-07-08

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Abstract: Objective To investigate the mid-term efficacy of double-column mobile-bearing unicompartmental knee prosthesis in the treatment of anterior-medial knee osteoarthritis. Methods A prospective single-arm clinical trial was conducted. From December 2018 to June 2019, 30 patients with anterior-medial knee osteoarthritis undergoing unicompartmental knee arthroplasty using double-column mobile-bearing prosthesis were prospectively enrolled at Qilu Hospital of Shandong University. Follow-up assessments were performed preoperatively and at postoperative intervals: 7 days, 6 weeks, 3 months, 6 months, 1 year and 5 years. Evaluations included Hospital for Special Surgery(HSS)functional scores and radiographic outcomes. Results The HSS scores significantly improved from preoperative(68.03±10.34)to 1-year postoperative(90.52±4.57)and 5-year postoperative(92.03±5.45). Statistically significant differences were observed in total scores and each subscale scores between preoperative and both 1-year and 5-year postoperative timepoints(P<0.05), whereas no significant differences existed between 1-year and 5-year scores(P>0.05). Radiographic assessments demonstrated effective correction of knee varus deformity with satisfactory prosthesis alignment. No severe complications occurred, including bearing dislocation or prosthesis loosening. Conclusion Unicompartmental knee arthroplasty with double-column mobile-bearing prosthesis shows favorable mid-term outcomes for anterior-medial knee osteoarthritis, demonstrating reliable prosthesis safety and efficacy.

Key words: Double-column mobile-bearing unicompartmental knee prosthesis, Unicompartmental knee arthroplasty, Anterior-medial knee osteoarthritis, Mid-term efficacy

CLC Number: 

  • R687.4
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