The rationale for motion preservation by disc replacement with MCD Device after anterior cervical discectomy is to diminish long-term morbidity secondary to adjacent segment degeneration. This procedure can be readily applied in patients presenting with neurologic deficit. radiculopathy or myelopathy because the approach and anterior spinal cord decompression are identical for anterior cervical disc replacement and traditional Smith-Robinson cervical decompression. In addition, the application of more complex spinal osteotomies, revision of pseudarthroses and deformity correction are much more applicable to the cervical arthroplasty procedures.

MCD Device is an attractive alternate to arthrodesis for management of disc degeneration and herniation in the cervical spine. The advantages of this system include preservation of normal motion and biomechanics in the previous cervical spine and reduction of adjacent-segment
degeneration. Other potential advantages include faster return to normal activity and elimination of the need for bone graft and associated donor site morbidity.

The physical structure of the device consists Titanium Alloy interior and superior pieces, introducing the mobility with Titanium Nitride (TiN) coated part included to interior piece.