Indications ? Intervertebral disc prolapse • Disc luxation or herniation ? Mechanical instability ? Calcification of the posterior structures ? Osteochondrosis ? Spinal canal stenosis Specific Advantages • Sharp titanium markers Easy identification and positioning ? Toothed.superior and inferior surfaces Assuring a secure seating of the implant ? Fenestrated implant Allowing good bony in-growth ? Oblong form Assuring an economic and efficient technique