Window, non-window 3D-printed titanium cages had similar outcomes, interbody fusion rates
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Key takeaways:
- Among 61 patients who underwent posterior lumbar interbody fusion, 95.1% achieved fusion.
- A non-window-type 3D-printed porous titanium cage had comparable fusion rates vs. a window-type cage.
Posterior lumbar interbody fusion performed with a non-window-type 3D-printed porous titanium cage had similar clinical outcomes and comparable interbody fusion rates compared with those who received window-type cages, according to results.
Dae-Woong Ham, MD, of the department of orthopedic surgery at Chung-Ang University Hospitals and the college of medicine at Chung-Ang University in Seoul, the Republic of Korea, and colleagues randomly assigned 70 patients undergoing posterior lumbar interbody fusion to receive either a window-type 3D-printed porous titanium (3D-Ti) cage (n = 37) or a non-window-type 3D-Ti cage without a void for bone graft (n = 33). Researchers assessed radiographic outcomes, including fusion rates, subsidence and intra-cage osseointegration patterns.
Overall, 61 patients completed the 12-month follow-up, including 32 patients in the window cage group and 29 patients in the non-window cage group. Results showed a fusion rate of 95.1%.
Ham and colleagues found comparable fusion rates between the non-window cage group and window cage group. They also found no significant difference in the subsidence rate between the two groups. According to results, a higher proportion of patients in the non-window cage group had an intra-cage osseointegration score of 4 vs. patients in the window cage group. Researchers said this difference was significantly different.
Results showed 87.9% of patients who achieved interbody fusion had a trabecular bone remodeling sign. Although a higher rate of patients in the non-window cage group had a trabecular bone remodeling sign, Ham and colleagues said this difference was not significant.
“These results suggest that the potential advantages for 3D-Ti cages could be optimized in the absence of a void for bone graft by providing a larger surface for osseointegration,” Ham and colleagues wrote.
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