The study examined 888 patients who underwent anterior cervical discectomy and fusion for degenerative disc disease, with 108 who developed adjacent segment disease that required a second cervical fusion. The researchers found that 27 of those patients developed recurrent ASD that required a third fusion.
ASD occurred 47±44.9 months after the first fusion procedure. Among the patients who received a second fusion with the anterior approach, 23 developed recurrent ASD while only four of 31 patients who underwent the second fusion posteriorly developed recurrent ASD.
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