Chinese Journal Of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (3): 336-340.doi: 10.13418/j.issn.1001-165x.2015.03.022

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Clinical observation of heterotopic ossification after Discover cervical disc replacement

LIANG Ying-jie 1,2,  ZHANG Guang-ming 2,   WEN Shi-feng 2,   GUO Dong-ming 2,   XU Zhong-he 2,  LIU En-zhi 2,  ZHONG Run-quan 2,  XIAO Wen-de 2,  YIN Qing-shui 1,3   

  1. 1.Southern Medical University, Guangzhou 510515, China;  2.Department of Spine Surgery, Guangzhou First People's Hospital,Guangzhou 510180, China;  3. Department of Orthopadedics,Guangzhou General Hospital of PLA, Guangzhou 510010, China
  • Received:2015-01-10 Online:2015-05-25 Published:2015-07-24

Abstract:

  Objective    To analyze the cause of heterotopic ossification of Discover artificial cervical disc replacement in the treatment of cervical vertebra disease and to explore preventive countermeasures.   Methods   We retrospectively reviewed radiographic and clinical outcomes in 23 patients who received the Discover cervical disc prosthesis. Static and dynamic X ray was taken for measurement of the range of motion. Replacement segment was assessed for heterotopic ossifications   at the latest follow-up  according to McAfee classification method.    Results    23 patients were followed up for 27~36 months. In the last follow-up, the average sagittal range of motion was 5.5°±2.2°,and the average coronal range of motion was 3.4°±1.2° and 3.6°±0.8°. A total of 5 patientsdemonstrated the prosthesis replacement segmental heterotopic ossification at the last follow-up, the incidence being 21.7%.  Conclusions  heterotopic ossification can occur after DISCOVER artificial cervical disc replacement in the treatment of cervical spondylosis; the incidence is consistent with the literature report; the surgeon should try consciously to prevent the occurrence of heterotopic ossification in order to avoid the loss of the mobility of the replacement segment.

Key words: Cervical spondylosis, Artificial intervertebral disc, Heterotopic ossification