How 2 lumbar disc replacements compare after 5 years: 5 things to know

Spine

A new study published in Spine examines two year outcomes from the CHARITE and Kineflex-L lumbar artificial disc replacements.

The study included 204 patients who received the Kineflex-L and 190 patients who received CHARITE. The researchers found:

 

1. The average Oswestry Disability Index and Visual Analog Scale scores improved significantly for patients in both groups six weeks after surgery. The improvements remained five years after surgery, with the ODI score at 20 for the two- and five-year follow-ups. Preoperative ODI scores were 60 on average. VAS scores improved by more than 50 percent by six weeks after surgery.

 

2. There was a similar reoperation rate — 11 percent — for both groups.

 

3. The segmental range of motion decreased three months postoperatively and then increased through the 24 month mark. After 24 months, the patients maintained segmental range through at least five years studied.

 

4. Researchers conducted a serum ion analysis in 32 patients who underwent surgery with the Kineflex-L and reported the greatest average value at any follow-up point was less than 20 percent of Medicines and Healthcare Products Regulatory Agency recommended minimum value for monitoring hip replacement patients.

 

5. The researchers concluded there wasn’t significant difference between the two discs five years after surgery.

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