
3D-Printed Porous Titanium versus Polyetheretherketone Cages in Lumbar Interbody Fusion: A Prospective, Multicenter, Randomized Controlled Trial with Bone Mineral Density Stratification

Optimizing Postoperative Sagittal Alignment: The Effect of Pedicle Screw Fixation in 540° Combined Surgery for Degenerative Cervical Disease
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