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  • Interbody fusion implants designed to be implanted within the intervertebral space between adjacent cervical vertebrae for the purpose of facilitating a spinal fusion procedure by maintaining the spacing of and stabilizing vertebrae being fused. These implants typically consist of a metallic (e.g., titanium), polymeric (e.g., polyetheretherketone [PEEK]), and/or ceramic (e.g., silver nitride) structure with a hollow, fenestrated body designed to allow packing of the implant with a bone autograft or bone graft substitute and promote bone ingrowth and incorporation of the implant/graft construct into the adjacent vertebral structures. Cervical interbody spinal fusion implants may be static or expandable. Static devices are supplied in a range of heights, widths, and lordotic angles among which a physician must choose to match a given patient\'s anatomy. Expandable devices provide a mechanism to customize the height, lordotic angle, and/or footprint of the interbody device by modifying the device after it has been placed in the intervertebral space or by assembling the interbody device in situ. Cervical interbody spinal fusion implants may be further classified by the intended surgical approach (e.g., anterior, posterior).
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