Anterior bone loss after cervical disc replacement: A systematic review

Table 2 Summary of the combined data of anterior bone loss in cervical disc replacement

Implant	Prevalence	Course	Effect	Outcome
Total	41.84% (159/380)	Occur within 3 mo postop; Does not progress after 12 mo postop; Self-healing in several cases	Higher VAS score within 12 mo postop in severe cases; Exposure or subsidence of implants in severe cases	No significant difference compared with patients without bone loss at the last follow-up
Bryan	22.16% (39/176)
Discocerv	47.73% (21/44)
Baguera-C	62.50% (65/104)
Mobi-C	91.89% (34/37)

VAS: Visual analogue score; postop: Postoperatively.