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Clinical improvements seen through 7 years after cervical disc replacement with low-profile device

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CHICAGO — Segmental motion in the cervical spine was maintained through 84 months in patients treated with cervical disc replacement, based on study outcomes presented at the North American Spine Society Annual Meeting, here.

Investigators used the Neck Disability Index, Neck and Arm Pain Numerical Rating Scales, SF-36 and other parameters as outcome measures and compared 211 investigational patients and 182 historical controls who underwent anterior discectomy and fusion (ACDF), according to Matthew F. Gornet, MD, who presented the findings.

“The 7-year results of this study show that patients receiving cervical disc replacement (CDR) maintain motion and quality of life,” Gornet stated in a press release from Medtronic, the manufacturer of the Prestige LP Disc studied. “At 24 months, Prestige LP patients demonstrated statistical superiority in overall success, and we see that trend continue in this 7-year data.”

According to the abstract and press release, patients who underwent CDR in the single-arm study exhibited a statistical improvement in overall success (74.9%) compared to patients in the ACDF group (63.2%).

The groups were statistically similar preoperatively. There were differences in other parameters that reflected on better postoperative motion, such as median return to work (RTW). The RTW was 40 days in the CDR group and 60 days in the ACDF group.

Furthermore, the results showed patients in the CDR group maintained 6.9° mean angular motion at the targeted level at 84-months follow-up.

Gornet and colleagues noted that use of the prosthesis in two-level cases and the impact on outcomes of heterotopic ossification and bridging bone are among the areas of further study. – by Susan M. Rapp

Reference:

Gornet MF, et al. Paper #91. Presented at: North American Spine Society Annual Meeting; Oct. 14-17, 2015; Chicago.

Disclosure: Gornet reports he receives royalties from Pioneer and Medtronic and has stock ownership in Bonovo, Oruoboros, International Spine & Orthopedic Institute, Nocimed and Paradigm Spine.