Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (13): 2011-2016.doi: 10.3969/j.issn.2095-4344.2015.13.009

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Short-term follow-up of total knee arthroplasty with LPS-Flex Mobile Bearing System knee prosthesis: range of motion of knee joint and function evaluation

Wu Guang-peng1, Xu Yao-zeng2, Zhu Yong-sheng1, Zhu Feng2, Shao Hong-guo1, Li Rong-qun2, Zhou Jun2   

  1. 1Medical School, Soochow University, Suzhou 215006, Jiangsu Province, China; 2Department of Orthopedics, First Affiliated Hospital, Soochow University, Suzhou 215006, Jiangsu Province, China
  • Received:2015-02-18 Online:2015-03-26 Published:2015-03-26
  • Contact: Xu Yao-zeng, M.D., Chief physician, Department of Orthopedics, First Affiliated Hospital, Soochow University, Suzhou 215006, Jiangsu Province, China
  • About author:Wu Guang-peng, Studying for master’s degree, Attending physician, Medical School, Soochow University, Suzhou 215006, Jiangsu Province, China

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Abstract:

BACKGROUND: Total knee arthroplasty has matured in clinical treatment. LPS-Flex Mobile Bearing System (Zimmer, USA) artificial knee prosthesis is the high-flexion rotating platform type knee prosthesis. The time of its clinical application in China is short, so its advantages have not been reported.
OBJECTIVE: To investigate the preliminary clinical outcome of the total knee arthroplasty with LPS-Flex Mobile Bearing system artificial knee prosthesis (Zimmer, USA), and to assess the biocompatibility of artificial prosthesis and host using range of motion of knee and function after replacement.
METHODS: We retrospectively analyzed 37 patients (42 knees) undergoing total knee arthroplasty using Zimmer LPS-Flex Mobile Bearing prostheses (high-flexion rotating platform type knee prosthesis) in The First Hospital Affiliated to Soochow University from February 2012 to March 2014, including 9 males (10 knees) and 28 females 
(32 knees), aged 47-78 years, averagely 63.7 years. Bone cement fixation was used, and the patella was not treated with replacement. Postoperative complications were observed. Ranges of motion of knee joint preoperatively and postoperatively were compared. The recovery of knee joint function was evaluated using Hospital for Special Surgery Knee Score.
RESULTS AND CONCLUSION: A total of 34 cases (38 knees) were followed up for 6-28 months. Range of motion of knee joint improved from 88.5° before operation to 124.2° after operation on average. Hospital for Special Surgery Knee Score improved from 52.5 before replacement to 91.1 after replacement, showing significant differences (P < 0.01). Therapeutic effects were assessed according to Hospital for Special Surgery Knee Score: excellent in 20 cases, good in 16 cases, average in 2 cases, with an excellent and good rate of 95%. The incidence of various complications was low. These data suggested that short-period clinical outcomes of high-flexion rotating platform type knee prosthesis replacement are satisfactory. This prosthesis has advantages in its design, which is more close to the physical structure of knee joint, but its long-period outcomes deserve further investigations.


中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程


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Key words: Arthroplasty, Replacement, Knee, Prosthesis Implantation, Follow-Up Studies

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