Chinese Journal of Tissue Engineering Research ›› 2020, Vol. 24 ›› Issue (36): 5785-5792.doi: 10.3969/j.issn.2095-4344.2930

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Mobile bearing and fixed bearing unicompartmental knee arthroplasty for medial knee osteoarthritis

Liu Shaohua1,2, Zhou Guanming1,2, Chen Xicong1,2, Xiao Keming1,2, Cai Jian1,2, Zeng Huiliang1,2   

  1. 1Foshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Chinese Medicine, Foshan 528000, Guangdong Province, China; 2Department of Arthrosis, Foshan Hospital of Traditional Chinese Medicine, Foshan 528000, Guangdong Province, China
  • Received:2020-02-29 Revised:2020-03-10 Accepted:2020-04-11 Online:2020-12-28 Published:2020-10-27
  • Contact: Zhou Guanming, Chief physician, Associate professor, Foshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Chinese Medicine, Foshan 528000, Guangdong Province, China; Department of Arthrosis, Foshan Hospital of Traditional Chinese Medicine, Foshan 528000, Guangdong Province, China
  • About author:Liu Shaohua Doctoral candidate, Attending physician, Foshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Chinese Medicine, Foshan 528000, Guangdong Province, China; Department of Arthrosis, Foshan Hospital of Traditional Chinese Medicine, Foshan 528000, Guangdong Province, China
  • Supported by:
    the Scientific Research Project of Guangdong Traditional Chinese Medicine Bureau, No. 20192095; the Research on Medical Science and Technology in Guangdong Province, No. 20161181228306

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Abstract:

BACKGROUND: Unicompartmental knee arthroplasty prostheses are mainly divided into two different types: mobile bearing and fixed bearing. Due to the different design concepts and surgical methods of the two platform prostheses, there are still some differences and controversies regarding the choice of two different platform prostheses.

OBJECTIVE: To compare the clinical effects of mobile bearing and fixed bearing unicompartmental knee arthroplasty in the treatment of medial interventricular osteoarthritis of knee joint.

METHODS: From February 2014 to February 2015, 154 patients who were diagnosed with osteoarthritis of the medial compartment of the knee joint and underwent unicompartmental knee arthroplasty at the Foshan Hospital of Traditional Chinese Medicine were selected. Among them, there were 54 male and 100 female patients, aged 56-81 years old. Among them, 100 patients received unicompartmental knee arthroplasty with mobile bearing (mobile bearing group) and 54 patients received unicompartmental knee arthroplasty with fixed bearing (fixed bearing group). The complications were recorded. After the operation, the visual analogue scale score, knee motion range, knee function and clinical KSS score were followed up. The X-ray films (tibiofemoral angle, hip knee ankle angle, tibial posterior angle) were reexamined to evaluate the force line correction of the lower limbs. The research meets the ethical requirements of Foshan Hospital of Traditional Chinese Medicine (fsz20130642).

RESULTS AND CONCLUSION: (1) 154 patients were followed up for 60-72 months postoperatively. (2) The visual analogue scale score, knee motion range, knee function and clinical KSS score in the last follow-up of the two groups were significantly improved (P < 0.05), and there was no significant difference between the two groups (P > 0.05). (3) The tibiofemoral angle, hip knee ankle angle and tibial caster angle in the last follow-up of the two groups were significantly improved (P < 0.05). The corrected values of tibiofemoral angle and hip knee ankle angle in the mobile bearing group were higher than those in the fixed bearing group (P < 0.05). There was no significant difference in the corrected values of tibial caster angle between the two groups (P > 0.05). There was no significant difference in the distribution of Kennedy and white in the mechanical axis of the lower limbs between the two groups (P > 0.05). (4) In the mobile bearing group, there were one case of prosthesis loosening and two cases of pad dislocation. (5) The results showed that there was no significant difference in the mid-term follow-up clinical results between the two kinds of platform single condylar replacement prosthesis in the treatment of medial compartment osteoarthritis of the knee, but the angle of force line correction of the lower extremity was larger in the mobile bearing unicompartmental knee arthroplasty than in the fixed bearing, which was more advantageous in the restoration of the anatomical axis of the lower extremity. The incidence of complications after the two kinds of unicompartmental knee arthroplasty was low. The incidence of complications was higher in the mobile bearing than that of fixed bearing during the mid-term follow-up. The main complications in the middle stage of mobile bearing were prosthesis loosening and pad dislocation.

Key words: bone, prosthesis, knee, fixed bearing, moving bearing, unicompartmental knee arthpoplasty, arthritis

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