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Chinese Journal of Joint Surgery(Electronic Edition) ›› 2021, Vol. 15 ›› Issue (05): 596-600. doi: 10.3877/cma.j.issn.1674-134X.2021.05.011

• Review • Previous Articles     Next Articles

Research progress on pain mechanism of knee osteoarthritis

Jianxiong Li1, Cheng Zhang1, Pengfei Xin1, Ziqi Li2, Zhikun Zhuang3, Wei He4, Qiushi Wei2,()   

  1. 1. Traumatology & Orthopedics Institute of Guangzhou University of Chinese Medicine, Guangzhou 510378, China; First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
    2. Traumatology & Orthopedics Institute of Guangzhou University of Chinese Medicine, Guangzhou 510378, China; Department of Joint Diseases, The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510378, China
    3. First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; Department of Orthopedics, Quanzhou Orthopedic Traumatological Hospital, Fujian Traditional Chinese Medicine University, Quanzhou 362000, China
    4. Traumatology & Orthopedics Institute of Guangzhou University of Chinese Medicine, Guangzhou 510378, China
  • Received:2021-03-14 Online:2021-10-01 Published:2021-12-06
  • Contact: Qiushi Wei

Abstract:

Knee osteoarthritis is a chronic, degenerative disease involving all structures in the joint. Pain, limitation of movement and joint deformity are the main symptoms of knee osteoarthritis. At present, the specific mechanism of knee osteoarthritis pain had not been fully elucidated, resulting in the treatment of knee osteoarthritis is not satisfactory. Pain is one of the main reasons for patients to receive joint replacement surgery. Based on the review of the literature, it is concluded that the pathological changes of articular cartilage, subchondral bone, synovium and infrapatellar fat pad of the knee joint may lead to the production of inflammatory mediators and other molecules, which may cause inflammatory reaction in the articulation and stimulate the sensory nerve. The pathological changes may also change the mechanical stress in the joint, which can stimulate the sensory nerve to cause pain. The changes of nerve function may exist in the whole course of knee osteoarthritis. Long-term stimulation of the sensory nerve changes the neurological function, resulting in synergistic effects such as improving pain sensitivity and magnifying the pain area.

Key words: Osteoarthritis, knee, Pain, Cartilage, articular, Hyperalgesia

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