Clinical observation of heterotopic ossification after Discover cervical disc replacement
Chinese Journal of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (3) : 336-340.
Clinical observation of heterotopic ossification after Discover cervical disc replacement
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.
Cervical spondylosis / Artificial intervertebral disc / Heterotopic ossification
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